Shaking causes small bubbles, which helps the soda's carbon dioxide escape faster. The gas will gradually escape from the liquid as bubbles once the can is opened, and the soda will become "flat." The dissolved gas takes a long time to escape if the liquid is treated gently.
At constant temperature, the behavior of a real gas more closely approximates that of an ideal gas as its volume increases due to which of the following?
At Constant temperature, the behavior of a Ideal gas more closely approximates that of an ideal gas as its volume increases due to the average distance between the molecule becomes greater.
According to the Molecular Theory of gases, at constant temperature the behavior of a sample of a real gas more closely approximates that of an ideal gas as its volume is increased because the average distance between molecules becomes greater. The temperature did not change, so the average kinetic energy and average molecular speed did not change. The molecule size does not change either, so the molecule could not have expanded. The distance between the molecules increases causing a decrease in intermolecular forces, thus reducing the interaction between the molecules.
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In conclusion, write down at least two pieces of evidence showing that Earth’s atmospheres or oceans have changed over time. Provide reasoning for each piece of evidence.
The evidence that is showing that Earth’s atmospheres or oceans have changed over time.
The planet progressively cooled over a very long period of time, millions of years. Water vapor turned from a gas to a liquid when the temperature fell low enough. The result was clouds. The oceans were created from these clouds, and the oceans absorbed a significant amount of the atmospheric carbon dioxide.How has Earth's atmosphere changed over time?Humans have dramatically changed the composition of the atmosphere and increased the amount of greenhouse gases in the environment since the industrial revolution. Long-term changes in our climate result from these gases' ability to make the atmosphere act more like a greenhouse and store more heat.
By condensation from the solar nebula, Earth was created 4.54 billion years ago, or roughly one-third the age of the universe. The primeval atmosphere was likely produced by volcanic outgassing, and others.
Therefore, Due to plant photosynthesis, the amount of oxygen rose. As ammonia reacted with the newly generated oxygen in the atmosphere to create nitrogen and water vapor, its proportion in the atmosphere fell. As it combined with the freshly created oxygen to create carbon dioxide and water, the amount of methane reduced.
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A molecule with the formula AB2 has a linear molecular geometry. Which of the following could represent the hybridization of the central atom?
In a molecule with the formula AB2, the hybridization of the central atom is typically sp hybridization. This type of hybridization allows for the formation of two single bonds in opposite directions, which gives the molecule its linear molecular geometry.
A molecule with the formula AB2, such as carbon dioxide (CO2), is an example of a linear molecular geometry. In this type of molecule, the central atom is bonded to two other atoms, forming a straight line. The hybridization of the central atom, which is the process of mixing different types of atomic orbitals to form new hybrid orbitals, is determined by the number and types of bonds formed with the atoms around it.
In a molecule with the formula AB2, the hybridization of the central atom is typically sp hybridization. This is because there are two single bonds formed with two different atoms, which would require the combination of one s orbital and one p orbital. The s orbital is used to form the sigma bond between the central atom and the two other atoms, while the p orbital is used to form the two pi bonds.
The sp hybridization of the central atom also allows the molecule to have a linear molecular geometry. This is because the two single bonds formed by the sp hybrid orbitals are in opposite directions and create a straight line, giving the molecule its linear shape.
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Assign the oxidation state for nitrogen in each of the following. a. Li3N f. NO2 b. NH3 g. NO22 c. N2H4 h. NO32 d. NO i. N2 e. NO
Answer:
Here are the oxidation states for nitrogen in each of the compounds you listed:
a. Li3N - Nitrogen has an oxidation state of +3 in Li3N.
b. NH3 - Nitrogen has an oxidation state of -3 in NH3.
c. N2H4 - Nitrogen has an oxidation state of +1 in N2H4.
d. NO - Nitrogen has an oxidation state of +2 in NO.
e. NO - Nitrogen has an oxidation state of +2 in NO.
f. NO2 - Nitrogen has an oxidation state of +4 in NO2.
g. NO2 - Nitrogen has an oxidation state of +4 in NO2.
h. NO3 - Nitrogen has an oxidation state of +5 in NO3.
i. N2 - Nitrogen has an oxidation state of 0 in N2.
The oxidation state of an element is a measure of the degree of oxidation or reduction that has occurred in a compound. It is determined by the number of electrons that an element has gained or lost in forming a chemical bond.
Using the energy stated in the text for the process in equation (5.28), calculate the unified atomic mass unit (symbols: Da or u) of 13N.
The energy is -3.00 MeV and the reaction is p + 13C ----> 13N +n. Thank you
To calculate the unified atomic mass unit (u) of 13N using the energy of the reaction given in equation (5.28), you can use the following equation:
u = energy / c^2
where energy is the energy of the reaction in joules, c is the speed of light in meters per second, and u is the unified atomic mass unit in kilograms.
First, you need to convert the energy of the reaction from MeV (Mega electron volts) to joules. You can do this using the conversion factor of 1 MeV = 1.602 x 10^-13 joules. Plugging in the values for the energy of the reaction (-3.00 MeV) and the conversion factor, you get:
Energy in joules = -3.00 MeV * 1.602 x 10^-13 joules/MeV = -4.806 x 10^-13 joules
Next, you need to convert the speed of light from meters per second to joules per second. You can do this using the conversion factor of 1 m/s = 1 j/s. Plugging in the value for the speed of light (299,792,458 m/s) and the conversion factor, you get:
c = 299,792,458 m/s * 1 j/s = 299,792,458 j/s
Now you can plug in the values for energy and c into the equation above to calculate the unified atomic mass unit of 13N:
u = (-4.806 x 10^-13 joules) / (299,792,458 j/s)^2 = 1.50 x 10^-27 kilograms
This is the unified atomic mass unit of 13N in kilograms. You can convert this value to atomic mass units (amu) by dividing it by 1.660 x 10^-27 kilograms/amu:
u in amu = 1.50 x 10^-27 kilograms / (1.660 x 10^-27 kilograms/amu) = 0.906 amu
Therefore, the unified atomic mass unit (u) of 13N is approximately 0.906 amu.
Starting with appropriate unlabeled organic compounds, show syntheses of each of the following:
Draw the reagents needed to produce C6H5—C≡C—T.
In first reaction alkyne is treated with base to remove proton later alkyne anion react with T20 to form tritium isotope labelled product.
What is reagent?
Reagent is a substance used to bring about a chemical reaction, or added to test if a reaction occurs. In a chemical reaction, one or more reactants are combined to form one or more products. A reagent is typically used to start, speed up, or determine the progress of a reaction. Common reagents include acids, bases, oxidizers, reducing agents, and salts. Reagents can also be used in qualitative or quantitative analysis to detect, measure, or separate chemicals in a sample.
For structure refer attached file
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After being treated with a base in the initial reaction to remove the proton, the alkyne anion then reacts with T20 to produce a product labeled with the tritium isotope.
A reagent in a chemical process is what?
In the field of chemical research, a "substance or compound that is given to a system in order to bring about a chemical reaction or is added to check whether a reaction is occurring or not" is referred to as a reagent. A similar response is utilized to validate the discovery of the presence of another drug.
A catalyst can speed up a certain chemical reaction, whereas a reagent is a material or mixture used in chemical analysis or other reactions.
See attached file for response.
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put the enzymes of the first half of the citric acid cycle in order from left to right. rank the items from first to last. to rank items as equivalent, overlap them.
succinate dehydrogenase, malate dehydrogenase, fumarase, and succinyl CoA synthetase. As a cofactor, it uses NAD+ or NADP+ to catalyze the interconversion of malate and oxaloacetate.
What function does malate dehydrogenase have in the gluconeogenic process?The process of creating glucose from smaller molecules, known as gluconeogenesis, also involves malate dehydrogenase. Oxaloacetate, a citric cycle intermediate, is created in the mitochondria by the action of pyruvate carboxylase on pyruvate.
What role does malate play?In addition to being a TCA cycle intermediary, malate is a key component of mitochondrial energy homeostasis and the source of carbon skeletons transferred from mitochondria to promote amino acid production.
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Cr2O3 + 2Al→ 2Cr + Al2O3
(a)Calculate the mass of aluminium need to react with I tonne of chromium (III) oxide.
(b) Calculate the mass of chromium produced from I tonne of chromium (III) oxide.
To solve this problem, we need to use the balanced chemical equation given in the question to determine the relative amounts of the reactants and products. The balanced chemical equation is:Cr2O3 + 2Al → 2Cr + Al2O3We are given that the starting amount is 1 tonne of chromium (III) oxide (Cr2O3), and we want to calculate the mass of aluminium needed to react with this amount. From the balanced equation, we can see that for every 1 mole of Cr2O3 that reacts, 2 moles of Al are needed.1 tonne is equal to 1000 kg, and the molar mass of Cr2O3 is 151.99 g/mol, so 1 tonne of Cr2O3 is equal to 1000 / 151.99 = 6.58 moles of Cr2O3. Since 2 moles of Al are needed for every 1 mole of Cr2O3, 6.58 moles of Al are needed to react with 1 tonne of Cr2O3.The molar mass of Al is 26.98 g/mol, so 6.58 moles of Al is equal to 6.58 x 26.98 = 179 kg of Al. Therefore, the mass of aluminium needed to react with 1 tonne of chromium (III) oxide is 179 kg.To calculate the mass of chromium produced, we can use the same method. From the balanced equation, we can see that for every 1 mole of Cr2O3 that reacts, 2 moles of Cr are produced. Since 1 tonne of Cr2O3 is equal to 6.58 moles, 6.58 x 2 = 13.16 moles of Cr are produced.The molar mass of Cr is 52 g/mol, so 13.16 moles of Cr is equal to 13.16 x 52 = 687 kg of Cr. Therefore, the mass of chromium produced from 1 tonne of chromium (III) oxide is 687 kg.
The balanced chemical equation provided in the question must be used to calculate the proportions of the reactants and products in order to answer this issue. Al2O3 + Cr2O3 = Cr2O3 + Al2O3 is the balanced chemical equation.
Given a starting amount of 1 tonne of chromium (III) oxide (Cr2O3) and need to determine how much aluminum is required for the reaction to occur.
We can see from the balanced equation that 2 moles of Al are required for every 1 mole of Cr2O3 that reacts. Given that 1 tonne is equivalent to 1000 kg and that Cr2O3 has a molar mass of 151.99 g/mol, 1 tonne of Cr2O3 is equal to 6.58 moles of Cr2O3.
In order for 1 tonne of Cr2O3 to react with 6.58 moles of Al, 2 moles of Al must be added for every mole of Cr2O3.6.58 moles of Al are equivalent to 6.58 x 26.98, or 179 kg, of Al since the molar mass of aluminum is 26.98 g/mol.
As a result, 179 kg of aluminum is required to react with 1 tonne of chromium (III) oxide.
We may apply the same procedure to determine the mass of chromium produced. The balanced equation shows that 2 moles of Cr are created for every mole of Cr2O3 that reacts.
Because 1 tonne of Cr2O3 is equivalent to 6.58 moles, the amount of Cr produced is 6.58 x 2 = 13.16 moles.
13.16 moles of Cr are equal to 13.16 x 52 = 687 kg of Cr since the molar mass of Cr is 52 g/mol. Consequently, 687 kg of chromium is created from 1 tonne of chromium (III) oxide.
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What is the volume of a 1.25 M solution
if it contains 42 grams of sodium
hydroxide.
Volume NaOH = [?] mL
Answer:
You could calculate the answer given the formula
M = mol/L
you can get mol using g/MolarMass
=> 42g/22.99g/mol = 1.82688125mol
1.25M = 1.82688125mol/V
=> apply simple algebra
V = 1.4615 L
=> Notice that the answer requires the unit to be ml
V = 1.4615L * 1000ml/L = 1461.5ml
=> Notice that the given grams have 2 sig figs
V = 1500 ml
which of the following molecules has a central atom with sp3 hybridization? x. becl42- y. sf4 z. bro3-
Only BeCl4^2- has a central atom with sp3 hybridization. The other molecules, SF4 and BrO3-, do not have a central atom with sp3 hybridization.
When it comes to identifying which of the following molecules has a central atom with sp3 hybridization, the answer is X. BeCl4^2-. This molecule has a central atom of beryllium, which has an electron configuration of [He] 2s^2 2p^1. In order to form a stable structure, the beryllium atom must use sp3 hybridization, which is a combination of one s orbital and three p orbitals. This hybridization allows the beryllium atom to form four single covalent bonds with the four chlorine atoms, resulting in a tetrahedral shape.
The other molecules, Y. SF4 and Z. BrO3-, have central atoms of sulfur and bromine, respectively. Both of these atoms have an electron configuration of [Ne] 3s^2 3p^4. This allows them to form a stable structure without needing to use sp3 hybridization. Instead, sulfur forms a seesaw shape using sp3d2 hybridization, while bromine forms a trigonal bipyramidal shape using sp3d2 hybridization.
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Another sample of eggshell reacts completely with 4.0 mL of an HCl(aq) solution of unknown concentration. If the reaction produced 0.095 atm of gas, the concentration of the HCl(aq) solution was at least (A) 0.0020 M (B) 0.050 M (C) 0.50 M (D) 1.0M
The concentration of the HCl (aq) solution was at least 1.0 M.
What is concentration?The abundance of a constituent divided by the sum of the mixture's volumes is the definition of concentration in chemistry. There are several different categories of mathematical description: mass concentration, molar concentration, number concentration, and volume concentration
P = 0.095atm(corresponds to 0.20g of CaCO3
so,moles of CaCO3 =0.20g/100gmol⁻¹=0.002moles
moles of HCl =(molesₓCaCO3ₓ2)=0.002ₓ2
M=0.004/4ₓ100
Concentration of HCl=1M
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How do i know how many valence electrons a metal has?
Answer:
Valence electrons are the outermost electrons of an atom, and the number of valence electrons in a metal can be determined by looking at the element's position on the periodic table. Generally, the columns on the periodic table are arranged in order of increasing valence electrons, except for the transition metals. The element's oxidation state can determine the valence electrons for transition metals.
Explanation:
which electrode is the anode, and which is the cathode? what are the signs of the electrodes? do electrons flow from the aluminum electrode to the nickel electrode, or from the nickel to the aluminum? in which directions do the cations and anions migrate through the solution? match the words in the left column to the appropriate blanks in the sentences on the right. resethelp alal nini blank electrode is the anode.target 1 of 8 blank electrode is the cathode.target 2 of 8 blank electrode is negative.target 3 of 8 blank electrode is positive.target 4 of 8 electrons flow from the blank electrode to the blank electrode.target 5 of 8target 6 of 8 anions migrate to the blank electrode.target 7 of 8 cations migrate to the blank electrode.target 8 of 8
Here, cathode seems to be the positive electrode and anode is the negative electrode. Positive (+) is the anode and negative (-) is the cathode. Thus, electrons go from the aluminosilicate and niobium
What does an electrode mean in electrical terms?A conductor used to establish contact with the a nonmetallic component of a circuit is known as an electrode. Electrodes are frequently employed in electrochemical cells, semiconductors including diodes, and medical equipment. The electrode is where the transport of electrons takes place.
What is the name of the two electrodes?Electrodes are divided into two categories, cathode and anode, depending on the sort of reaction that takes place in an electrochemical cell. Positive and negative charges, respectively, are present at the cathode and anode.
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Which of the following electron transitions in a hydrogen atom emits radiation of the shortest wavelength?
A. n = 4 to n = 1
B. n = 2 to n = 8
C. n = 5 to n = 4
D. n = 2 to n = 1
E. n = 4 to n = 2
F. n = 1 to n = 5
The electron transition from n = 4 to n = 1 emits radiation of the shortest wavelength in a hydrogen atom.
How transition from n = 4 to n = 1 emits radiation of the shortest wavelength?Energy is either released or absorbed as an electron moves from one shell to another. The formula for calculating the wavelength produced by electron transfer is as follows:
1/λ = R ([tex]\frac{1}{n_{1} ^{2} } - \frac{1}{n_{2} ^{2} }[/tex])
where,
λ = wavelength of the photon (wavenumber = 1/wavelength)
R = Rydberg's constant (1.0973731568539(55) x 107 m-1)
[tex]n_{1}[/tex] and [tex]n_{2}[/tex] are integers where [tex]n_{2}[/tex] > [tex]n_{1}[/tex]
Therefore, on putting the respective values of [tex]n_{1}[/tex] and [tex]n_{2}[/tex], we can find out that the transition of electron from n = 4 to n = 1 radiates the shortest wavelength in a hydrogen atom.
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provide the missing reagents and aromatic compounds in the reaction scheme. show formal charges if applicable. the nitro group can be found in the groups menu. note that this question provides no targeted feedback.
One of the most widely used explosophores—functional groups that give a compound its explosive properties—in the world is the nitro group. Also strongly electron-withdrawing is the nitro group. This property allows for the possibility of acidic C-H bonds that are alpha to the nitro group (nearby).
How can you recognize a nitro group?The silver-mirror appearance that develops at the end of the reaction serves as a marker for the Nitro group. Tollen's reagent is used to heat hydroxylamine even more. Heating causes hydroxylamine to oxidize into the appropriate nitroso compound and reduce Tollen's reagent to metallic silver.
A nitro functional group has what name?The prefix "nitro" is added to the name of the matching alkane or arene to create the name of any nitro compound.
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question:-
What type of group is nitro group?
Magnesium parts are typically attached using
Magnesium parts are typically attached using mechanical fasteners.
What are mechanical fasteners?A tool used to mechanically attach (or fasten) two or more things together is known as a mechanical fastener. Although there are many distinct kinds of mechanical fasteners, they can generally be split into two groups: permanent and non-permanent fastening.
There are many different kinds of mechanical fasteners, such as screws, nails, nuts, bolts, washers, anchors, and rivets.
Since World War II, magnesium sheet has been utilized in the transportation sector as a structural material.
For the purpose of attaching magnesium components to various metal substrates, upset protrusion joining was created. Cast and wrought alloys are the two primary divisions of magnesium alloys. Cast alloys made of magnesium are the most common use. Many industries use parts and components made of magnesium and magnesium alloys.
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Select the correct answer.
Why is it important for scientists to keep testing a hypothesis even after they’ve found it to be true?
A.
Repeated tests help determine whether the hypothesis is always true in different circumstances.
B.
Experiments are rarely accurate, so it’s important to keep testing a hypothesis.
C.
Scientists can learn experimental procedures through repeated testing of a hypothesis.
D.
Repeatedly testing a hypothesis qualifies it to be accepted as a theory.
Answer:
B. Experiments are rarely accurate, so it’s important to keep testing a hypothesis.
Explanation:
Now you shine light with a continuous energy distribution and you observe absorption lines at the following photon energies: 1eV, 3eV, 4eV, and 7eV. Using the information from the two experiments described, select the energies that correspond to all the energy levels of this atom. Hint: Similar to potential energy, the absolute values of the energy levels are arbitrary to a constant, but the difference in energies between levels is not. Follow the convention that the ground state energy (the lowest energy state) is the negative of the ionization energy and base your other answers around this. O eV -1 eV ✓-2 eV -3 eV -4 eV ✓-5 eV ✓-6 eV -7 eV -8 eV ✓-9 eV -10 eV -11 eV | -12 eV Now you turn off the light and run a beam of electrons through the gas. The kinetic energy of the electrons is 3.5 eV. Collisions of the electrons in the beam with the atoms in the gas exite the atoms to states above the ground state. Select all the possible energies of the emitted photons from this gas. 1 eV 2 eV 3 eV 4 eV 5 eV 6 eV 7 eV 8 eV 9 eV 10 eV
Answer:
help what is this im so sorry u have to do this
Explanation:
omg
An atomic nucleus, atom, or molecule's ground state is its lowest energy state. Excited states are referred to as higher energy states. Any particle property that has been quantized falls under the ground state.
What is Ground state energy?Atomic ground states and Ground states of vibration, Rotational ground conditions of atoms and molecules, as well as their excited states, are significant.
Most molecules are in their electron and vibrational ground states at ambient temperature; they must be heated to enter excited states.
Since a molecule requires less energy to enter a rotational excited state than an electron or vibrational excited state, the majority of molecules are in an excited rotational state at room temperature.
Therefore, An atomic nucleus, atom, or molecule's ground state is its lowest energy state. Excited states are referred to as higher energy states. Any particle property that has been quantized falls under the ground state.
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The distance from the sun to jupiter is 778,000 000km. How long does it take for light from the sun to jupiter?
Answer:
Jupiter is 5.2 astronomical units from the Sun, at a distance of 484 million miles (778 million kilometres) on average. The distance between the Sun and Earth is one astronomical unit, or AU. Sunlight travels from the Sun to Jupiter at this distance in 43 minutes.
Explanation:
Astronomical unit (AU, or au), a measurement of length that is equivalent to 149,597,870.7 km of the mean or average distance between Earth and the Sun (92,955,807.3 miles).
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2.6×10³Seconds is the time taken by the light to cover the distance from sun to Jupiter.
Time= distance ÷speed
Time=?
Distance= 778,000 000 kilometre
Speed of light is= 3×10⁸
Converting the 778,000 000 kilometre into metre
Since we know that 1 kilometre = 1000 meter
So we will multiply 1000 to the given value 778,000 000 kilometre
So the answered will be,
= 778,000 000,000 meter
Now we can write this value as,
= 778 × 10⁹ meter
Also, = 7.78 × 10¹¹ meter
Now we are putting the values into the above formula that is,
Time= 7.78 × 10¹¹ ÷ 3×10⁸
Time= 2.6 × 10³ Seconds
Jupiter: Jupiter is the fifth planet from the Sun and is the biggest planet in the Solar System. It is a gas giant with a mass just below one thousandth that of the Sun but greater than 2.5 times that of all the other planets combined in the Solar System.
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which of the following should give a positive result on the benedict's test for reducing sugars? there are 3 correct answers.
Using Benedict's solution, lowering sugars such as glucose, fructose, and maltose produce favorable effects.
What is Benedict's sugar test's positive outcome?A brick-red precipitate that forms as a result of Benedict's reagent's interactions with reducing sugars is a sign that the test is successful.
Is Benedict's test for protein positive?Indophenol Test in Vitamin C and the Benedict Test of Reducing and Non-Reducing Sugars.An illustration of the protein biuret test.Positive evidence that proteins is present is a color change from blue to purple.
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place the following steps for balancing a redox reaction that occurs in acidic solution in the correct order. start with the first step at the top of the list.
Divide the imbalanced response into two equal halves. - maintain atomic equilibrium for each half-reaction. To balance oxygen, add H2O to each half-reaction that requires it, and to balance hydrogen, add H+ as necessary.
Which redox reaction is it?Redox reactions are oxidation-reduction chemical processes in which the oxidation states of the reactants change. Redox is a shortened version of reduction-oxidation. Two distinct techniques may be used to summarize all redox reactions.
Why not offer two examples of redox?Redox reactions are those in which one chemical is reduced and another is oxidized. Here, oxygen is being introduced, which causes C to oxidize into CO, and oxygen is being withdrawn, which causes ZnO to decrease to Zn. It is a redox reaction as a result.
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The corrosion (rusting) of iron is represented as follows: 3 O2 (g) + 4 Fe (s) —> 2 Fe,O3 (s).
What volume (in liters) of Oxygen gas would be required to produce 32.0 g of Fe2O3?
Answer:
0.068 liters of Oxygen gas would be required to produce 32.0 g of Fe2O3.Explanation:
To calculate the volume of Oxygen gas that would be required to produce a given amount of Fe2O3, we need to use the balanced chemical equation for the corrosion (rusting) of iron. The equation is:
3 O2 (g) + 4 Fe (s) —> 2 Fe,O3 (s)
This equation tells us that for every 3 molecules of Oxygen gas that react with 4 molecules of Iron, 2 molecules of Iron (III) oxide (Fe2O3) are produced. Since the atomic weight of Oxygen is 16.0 g/mol and the atomic weight of Iron is 56.0 g/mol, the molar ratio of Oxygen to Iron in the equation is 3/16 = 0.1875.
We can use this molar ratio to calculate the volume of Oxygen gas that would be required to produce a given amount of Fe2O3. To do this, we first need to convert the mass of Fe2O3 to moles. Since the atomic weight of Fe2O3 is 159.7 g/mol, 32.0 g of Fe2O3 is equivalent to 32.0 / 159.7 = 0.201 moles of Fe2O3.
We can then use the molar ratio of Oxygen to Iron to calculate the number of moles of Oxygen gas that would be required to produce 0.201 moles of Fe2O3. Since the molar ratio of Oxygen to Iron is 0.1875, 0.201 moles of Fe2O3 would require 0.201 * 0.1875 = 0.0376 moles of Oxygen gas.
Finally, we can use the molar volume of a gas at standard temperature and pressure (STP) to convert the number of moles of Oxygen gas to volume. At STP, one mole of a gas occupies a volume of 22.4 liters, so 0.0376 moles of Oxygen gas would occupy a volume of 0.0376 * 22.4 = 0
Geh lang
Consider the following exothermic reaction (with an enthalpy change of -514kJ) at equilibrium:
2 CO2 (g) <-----> 2 CO (g) + O2 (g)
Le Chatelier's principle states that the equilibrium partial pressure of CO(g) can be maximized by carrying out the reaction .
(a) at high temperature and high pressure
(b) at high temperature and low pressure
(c) at low temperature and low pressure
(d) at low temperature and high pressure
(e) none of the choices given here
The equilibrium partial pressure of CO(g) can be maximized by carrying out the reaction at low temperature and low pressure.
What does Le Chatelier's principle state?According to Le Chatelier's principle, when a dynamic equilibrium is disturbed by an external element, the equilibrium will move in a way that may counteract the effect of the external factor in order to maintain the equilibrium.
The given reaction is-
2CO₂(g) ⇄ 2CO(g) + O₂(g) (ΔH = -514 kJ)
Now, how does change in pressure and temperature affects the reaction-
Change in pressure:
The equilibrium will move toward the side where there are less moles of gas from the reaction as pressure rises. Additionally, when pressure drops, the equilibrium will move in favor of the side where there are more gas molecules involved in the process.
2.0 moles of gases are on the reactants side (on the left) and 3.0 moles are on the products side (on the right).
Therefore, lowering the pressure will cause the reaction to move to the side where there are more gas molecules (right side, products) and the equilibrium partial pressure of CO(g) can be maximized at low pressure.
Change in temperature:
The sign of H indicates that the reaction is exothermic (negative).
The concentration of the products side will decrease as the temperature drops, so the reaction will be moved to the right to counteract the temperature drop so that the equilibrium partial pressure of CO (g) can be maximized at low temperatures.
Hence the correct answer is low temperature and low pressure.
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Complete the paragraph to describe precipitation reactions.
Chemical precipitation occurs when a product is
and precipitates out of a solution. By comparison, precipitation reactions require the reactants to be
in the solvent.
Chemical precipitation occurs when a product is insoluble and precipitates out of a solution. By comparison, precipitation reactions require the reactants to be soluble in the solvent.
What is Chemical precipitation ?Chemical precipitation is a type of chemical reaction in which a solid substance is formed from the reaction of two or more dissolved chemicals. In a chemical precipitation reaction, ions from the reactant solutions combine to form a new compound that is insoluble in water, causing it to "precipitate" or settle out of the solution as a solid. Chemical precipitation reactions are often used in the laboratory to purify and isolate compounds, as the solid precipitate can be easily separated from the liquid solution using techniques such as filtration or centrifugation. The formation of a solid precipitate is typically indicated in a chemical equation by the presence of a (s) notation after the product.To learn more about Chemical precipitation refer :
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Answer: 1.) insoluble 2.) soluble
Explanation: EDMENTUM
Name the compound Al2O3.
A) Aluminum oxide
B) Aluminum (II) oxide
C) Dialuminum trioxide
D) Aluminum trioxide
E) Aluminum (I) oxide
Answer:
A
Explanation:
Aluminum has only one oxidation state, +3, so no need to specify its oxidation state (III) in its name. Also, ionic compound--between metals and non-metals--do not need a mono, di, or tri added to the beginning of each element's name.
Question:
Answer the following questions about the element selenium.
a) Samples of natural selenium contain six stable isotopes. In terms of atomic structure, explain what these isotopes have in common and how they differ.
b) Write the complete electron configuration (i.e. 1s2) for a selenium atom in the ground state. Indicate the number of unpaired electrons in the ground-state atom and how it may react in a chemical reaction. Explain your reasoning.
c) In terms of atomic structure, explain why the first ionization energy of selenium is less than that of bromine, and greater than that of tellurium.
d) Selenium reacts with fluorine to form selenium tetrafluoride. Draw the complete Lewis electron-dot structure for SeF4 and sketch the molecular structure. Indicate whether the molecule is polar or nonpolar, and justify your answer.
Selenium is a chemical element with the atomic number 34 and the symbol Se. It is a nonmetal with properties that are intermediate between sulphur and tellurium in the periodic table, as well as similarities to arsenic.
a) The isotopes have the same number (34) of protons, but a different number of neutrons.
b) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^4 is the complete electron configuration for a selenium atom.
c) Se' 1st ionization energy is greater than Te because Se is experiencing less shielding than Te, as a result Se' electrons are more attracted to the nucleus compared to Te.
d) Seesaw shape is the shape of the selenium tetrafluoride and the number of electrons is 34. It is polar due to Asymmetry.
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Write equations to show what happens when, to a buffer solution containing equimolar amounts of PO43 and HPO4, we add
(Use the lowest possible coefficients. Omit states of matter.)
H₂O+
Бон
+
+
Buffer solution containing equimolar amounts of PO₄³⁻ and HPO₄²⁻ then
a) PO₄³⁻ + H3O⁺ = HPO₄²⁻ + H₂O
b) HPO₄²⁻ + OH⁻ = PO₄³⁻ + H₂O
How are equimolar solutions distinguished?A) Add mg to each solution, then watch for gas bubbles to emerge. B) Change the temperature of each solution by adding aqueous sodium hydroxide. C) To determine how bright the light glows, use all solution in an electric circuit containing a battery and a lamp. D) Try the remedies.
What is an example of an equimolar solution?Equimolar remedies Equimolar solution are those in which each mole of a solvent is saturated in the same amount of solvent. As a result, all the colliding characteristics also remains the same in a molar ratio solution since both solvents have the same quantity or number of moles.
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The complete question is-
Write an equation to show what happened when, to a buffer solution containing equimolar amounts of PO₄³⁻ and HPO₄²⁻, we add.
a) H3O⁺
_____ + _____ ----> _____ + _____
b) OH⁻
_____ + _____ ----> _____+ _____
please do the math
given that the measured pH of a 0.10 M NH3(aq) = 11.15 and that of the 0.10 M NaOH(aq)= 12.85
A.) Which solution is more basic, explaining based on pH values?
B.) Considering the strength of each base and the identical solution Molarities, why is one so much more basic than the other ?
a) The more basic solution is NaOH
b) The reason for this is that NaOH is a strong bas and dissociates completely in solution.
What is the pH?We know that the pH has to do with the degree of acidity or alkalinity of the solution. The more the pH of the solution the more basic the solution is. The lesser the pH of the solution, the more acidic the solution is.
Drawing form the explanation above, the solution that is more basic is the sodium hydroxide solution. The sodium hydroxide solution is a strong base so it would ionize completely in solution.
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Ionic bonds are formed between...
answer choices
Non - metals
A metal and a non-metal
Metals
Since non-metals (-ve ion) are "stronger" than metals (+ve ion), they may easily obtain electrons from metals. Ionic bonds are created when these two opposing ions are drawn to one another.
What is referred to as metal?The term "metal" refers to any one of a group of materials with high thermal and electrical conductivities, as well as malleability, ductility, and high light reflection.
What gives it the name "metal"?During the hippy era, when "heavy" indicated serious or profound, the term "metal" is thought to have originated. A few essential elements make up metal music: forceful drumming, extra-low bass notes, and angry or throaty vocals. The guitar riffs and chords are sometimes greatly distorted.
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The energy of a photon of green light is 3.74x10^–19 J and the energy of a photon of infrared radiation is 9.25x10^–20 J. Green light has a ______________ frequency and a ________________ wavelength than infrared radiation.
A. higher, shorter
B. higher, longer
C. lower, shorter
D. lower, longer
Explain your answer.
Green light has a higher frequency and shorter wavelengths than infrared radiation. Option A is correct.
What is the difference between green light and infrared radiation?On the electromagnetic spectrum, green light, which is visible light, has a wavelength that falls between 380 nm and 750 nm, while infrared light, which begins at 700 nm and extends to 1 mm, is just beyond it. Because of this, infrared can only be viewed with specialised tools like security cameras.
Due to their longer wavelengths than visible light, infrared waves can travel across crowded areas of gas and dust in space without being significantly scattered or absorbed. In comparison to infrared photons, visible light has shorter wavelengths and higher frequency.
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