Answer:
A compound is something like atoms coming together as a team, and a mixture is 2 or more substances mixing together.
Explanation:
the property of matter that determines whether or not an electrical current can pass through it
Carbon has a half-life of 5,730 years and you found a fossil with 4 atoms of Carbon and 12 atoms of
Nitrogen, how old would it be?
a. 0 years old
b. 5,730 years old
c. 11,460 years old
d. 17,190 years old
Answer:
D. 17,190 years old
Equation for the incomplete combustion of methanol
Answer:
The basis for incomplete combustion is that instead of carbon dioxide being produced alongside water, carbon monoxide and carbon is produced instead, the carbon being released as soot. That handily sets the products up for the equation.
And combustion is simply a reaction between a fuel, in this case, methanol and oxygen.
The chemical formula for methanol is CH3OH. Simply write the reactants and products as a chemical equation and balance it, and you have the equation.
Explanation:
Which of the following is considered to be matter?
O A. Water
O B. Facts
O C. Energy
D. Theories
bcz the defination of matter is that
anything which occupy space
water can occupy space so it is matterfact :something that you know has happened or is true which doesn't occupy any space so this option is falseenergy : energy is the quantitative property that must be transferred to a body or physical system to perform work on the body, or to heat it. it doesn't occupy any space so this option is falseA theory is a well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses and facts.--it doesn't occupy any space so this option is falseHence , option a is correct
3. Given 20g of Barium Hydroxide, how many grams of
Ammonium Nitrate would it take for all the Barium Hydroxide
to react? Balance the chemical equation first
The number of grams of ammonium nitrate (NH₄NO₃) it would take for all the barium hydroxide to react is 18.7g
First, we will write the balanced chemical equation for the reaction
The balanced chemical equation for the reaction is
Ba(OH)₂ + 2NH₄NO₃ → 2NH₄OH + Ba(NO₃)₂
This means, 1 mole of barium hydroxide is required to react with 2 moles of ammonium nitrate
Now, we will calculate the number of moles of barium hydroxide present.
Mass of barium hydroxide (Ba(OH)₂) = 20 g
Using the formula
[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]
Molar mass of Ba(OH)₂ = 171.34 g/mol
∴ Number of moles of Ba(OH)₂ present =[tex]\frac{20}{171.34}[/tex]
Number of moles of Ba(OH)₂ present = 0.116727 mole
Now,
Since 1 mole of barium hydroxide is required to react with 2 moles of ammonium nitrate
Then,
0.116727 mole of barium hydroxide will react with 2 × 0.116727 mole of ammonium nitrate
2 × 0.116727 = 0.233454 mole
∴ Number of moles of NH₄NO₃ required is 0.233454 mole
Now, for the mass of ammonium nitrate (NH₄NO₃) required
From the formula
Mass = Number of moles × Molar mass
Molar mass of NH₄NO₃ = 80.043 g/mol
∴ Mass of NH₄NO₃ required = 0.233454 × 80.043
Mass of NH₄NO₃ required = 18.68636 g
Mass of NH₄NO₃ required ≅ 18.7g
Hence, the number of grams of ammonium nitrate (NH₄NO₃) it would take for all the barium hydroxide to react is 18.7g
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How many K are in 32 o C?
Answer:
273.15 Kelvins
Explanation:
Hope this helps !!!14. Which has the lowest ionization energy?
A. beryllium (Be) B. strontium (Sr) Calcium (Ca) D. magnesium (Mg)
Answer: B. strontium
Explanation: This is due to electrons being further away from the nucleus in strontium.
Why does adding salt allow ice to freeze milk?
A.It increases the freezing point
B.Salt is colder than point
C.It increases the boiling point
D.It decreases the freezing point
Answer:
It increases the freezing point
Explanation:
The salt lowers the temperature at which water freezes. :)
1. Here is a chemical equation: C2H2 + O2 → CO2 + H2O
• A Balance this chemical equation.
• B State what type of chemical reaction this is.
• C What will happen during this reaction besides just CO2 and H2O being released.
• D Discuss how your balanced chemical equation agrees with the law of conservation of mass.
2. Balance each of the reactions listed below. What type of reactions are they? Single-displacement, double-displacement, synthesis, decomposition, or combustion reaction.
• A Na + Cl2 → NaCl
• B Fe + O2 → FeO
Answer:
1) a) 2 C2H2 + 3O2 --> 2CO2 + 2H2O
b) Combustion Reaction
c) Bonds will be broken on the reactant side which will require energy.
d) It agrees with the law of conservation of mass because there are the same amount of molecules of each element on both sides of the equation, meaning mass was not created nor destroyed.
2) a) 2Na + Cl2 --> 2NaCl
Synthesis
b) 2Fe + O2 --> 2FeO
Synthesis
Hope this helps!
Explanation:
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, the balanced equation is
2 C[tex]_2[/tex]H[tex]_2[/tex]+ 3O[tex]_2[/tex] [tex]\rightarrow[/tex] 2CO[tex]_2[/tex]+ 2H[tex]_2[/tex]O
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
a) 2 C[tex]_2[/tex]H[tex]_2[/tex]+ 3O[tex]_2[/tex] [tex]\rightarrow[/tex] 2CO[tex]_2[/tex]+ 2H[tex]_2[/tex]O is the balanced equation
b)Reaction is a Combustion Reaction
c) energy is required for the breaking of bond.
d) It agrees with the law of conservation of mass as the number of atoms of each element on reactant and product side is same.
Therefore, the balanced equation is
2 C[tex]_2[/tex]H[tex]_2[/tex]+ 3O[tex]_2[/tex] [tex]\rightarrow[/tex] 2CO[tex]_2[/tex]+ 2H[tex]_2[/tex]O
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In general, people of __ heritage will be the last to get
white hair.
Answer:
African?
Explanation:
In one to two sentences, describe an experiment that would show that intramolecular forces (attractions between atoms within molecules) are stronger than intermolecular forces (attractions between molecules).(2 points)
An experiment that would show that intramolecular forces are stronger than intermolecular forces will be heating a block of ice in a sealed container then allowing it to change to steam.
Intramolecular forces are the forces of attraction that hold atoms together within a molecule. Intramolecular forces require a high amount of energy to splits atoms or molecules in a chemical bonding.
Intermolecular forces are weaker forces of attraction that occur between molecules. They require lesser energy to splits molecules compared to intramolecular forces.
An experiment that would show that intramolecular forces are stronger than intermolecular forces will be heating a block of ice in a sealed container then allowing it to change to steam.
In the process, the energy required to change the state from ice to steam water is more than intermolecular forces.
Thus, we can conclude that this experiment shows that the intramolecular forces are stronger than the intermolecular forces.
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Heart, 5 stars, and Brainiest to first right answer!
Which layer of the atmosphere reflects radio waves back to Earth?
A. Mesosphere
B. Stratosphere
C. Thermosphere
D. Troposphere
Answer:
Thermosphere
Explanation:
More specifically the ionosphere, since the ionosphere is the lower part of the thermosphere.
Hope this helps!
A mixture contains 220 mmHg of CO, 350 mmHg of Ne and 840 mmHg of He. What is the total pressure of the mixture
a
1.86 at
b
1.59 atm
c
1.46 atm
d
none of these
Considering the Dalton's partial pressure, the correct answer is option a.: the total pressure of the mixture is 1.86 atm.
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
[tex]P_{T} =P_{1} +P_{2} +...+P_{n}[/tex]
where n is the amount of gases present in the sample.
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case, a mixture contains 220 mmHg of CO, 350 mmHg of Ne and 840 mmHg of He. The total pressure of the mixture can be calculated as:
[tex]P_{T} =P_{CO} +P_{Ne} +P_{He}[/tex]
[tex]P_{T} =220 mmHg +350 mmHg+840 mmHg[/tex]
Solving:
[tex]P_{T}[/tex]= 1410 mmHg
Being 760 mmHg=1 atm, then:
[tex]P_{T}=1410 mmHgx\frac{1 atm}{760 mmHg}[/tex]
Solving:
[tex]P_{T}[/tex]= 1.86 atm
Finally, the correct answer is option a.: the total pressure of the mixture is 1.86 atm.
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brainly.com/question/14239096?referrer=searchResults brainly.com/question/25181467?referrer=searchResults brainly.com/question/14119417How many carbon atoms are in 11.2 ML of C3H6O
1 mL = 0.815 g
11.2 mL = X
X = 11.2 × 0.815
= 9.128 g
mole = 9.128/58
= 0.157 mole
1 mole = 6.02 × 10^23 atoms
0.157 mol = x
X = 0.157/1 × 6.02 × 10^23
= 9.451 × 10^22 atoms of C
please to recheck answers to ensure they are correct
I really hope this helps
_265Hs--->_16O+_9Be=_____?
Answer:
265hs+24.464536b+16o
Explanation:
265hs+16o+9b(2.718282)
=265hs+16o+24.464536b
=265hs+24.464536b+16o
How many moles does 205 g of helium,He, contain ?
Answer:
4.002602
Explanation:
Seems Am Converting Between Grams Helium And Mole.
How do you out pizza the hut?
2. In which state of matter do particles vibrate in place? *
1 point
A. gas
B. solid
C. liquid
solid.................
Answer:
b solid
Explanation:
i know for a fact
In the chemical stockroom, there is a 0.500 L bottle filled with 2.30 M CuSO4 solution. How many moles of CuSO4 are in the bottle?
A. 0.217 moles
B. 4.60 moles
C. 01.15 moles
D. 1.80 moles
The number of moles of the solute in the solution is the product of its volume and molarity. The number of moles of copper sulphate in 0.500 L of 2.30 M solution is 1.15 moles.
What is molarity?Molarity of a solution is the common term used to represent the concentration of a solution. It is the ratio of its number of moles of solute to the volume of solution in liters.
Molarity = no.of moles/volume in L.
Molarity is a temperature dependant quantity.
The given solution has a volume of 0.500 L.
molarity of copper sulphate solution = 2.30 M
Thus, number of moles of copper sulphate solute dissolved in 0.50 L of water is calculated by multiplying the volume with molarity.
No. of. moles of copper sulphate = molarity × volume
= 0.500 L × 2.30 M = 1.15 moles.
Therefore, there will be 1.15 moles of copper sulphate in the solution.
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Sound travels from a phone speaker to the ear of the person listening to the call. Sound waves are modeled by the image below. 1) What do the dots in the image represent? 2) How do sound waves travel through air to a person’s ear?
Answer:
Remember the black and red dots represented in the below animation are not molecules. They are just markers enabling us to visualize the local displacement of air particles and so, the rise and fall of pressure within the wave medium.
The air is made up of many tiny particles. When sound is created, the air particles vibrate and collide with each other, causing the vibrations to pass between air particles. The vibrating particles pass the sound through to a person's ear and vibrate the ear drum. Light travels much faster than sound through air.
Explanation:
Write the IUPAC names for the following compounds.
Will mark BRAINLIEST!!
PLEASE ANSWER I HAVE 5 MINS
Answer:
Explanation:
7A 0.2
7B cork
7C Yes because the lighter it is the more likely it will float
7D Density is one of the fundamental scientific principles of life. It can describe any everyday object. Despite its significance, students often struggle to understand what it really is. Density is a measurement of how much space or volume is packed in an object or substance.
8 property means a characteristic or trait that you can use to describe matter by observation, measurement, or combination.
? Which types of batteries are commonly used in laboratory equipments
Answer:
your question is not very clear but I think the answer is either
Primary (non-rechargeable)
Secondary (rechargeable) or
Lithium-ion battery.
Rechargeable li-ion button cell.
Help asap plzzzzz!!!!!!!!!!!!!
Answer:
Water will generally require more energy for a phase change compared to a similar substance without hydrogen bonds.
Explanation:
How many moles of chlorine could be produced by decomposing 157g NaCl? 2NaCl --> 2Na+Cl2
By decomposing 157g of NaCl, approximately 1.35 moles of chlorine can be produced.
To determine the number of moles of chlorine that could be produced by decomposing 157g of NaCl, we need to use the molar mass of NaCl and apply stoichiometry.
The molar mass of NaCl is the sum of the atomic masses of sodium (Na) and chlorine (Cl), which is approximately 22.99 g/mol + 35.45 g/mol = 58.44 g/mol.
Now, we can calculate the number of moles of NaCl:
Moles of NaCl = Mass of NaCl / Molar mass of NaCl
Moles of NaCl = 157 g / 58.44 g/mol
Moles of NaCl ≈ 2.69 mol
According to the balanced equation 2NaCl → 2Na + Cl₂, we can see that for every 2 moles of NaCl, we produce 1 mole of Cl₂.
Therefore, using the stoichiometric ratio, we can calculate the number of moles of chlorine produced:
Moles of Cl₂ = (Moles of NaCl / 2) × 1
Moles of Cl₂ = 2.69 mol / 2
Moles of Cl₂ ≈ 1.35 mol
Thus, by decomposing 157g of NaCl, approximately 1.35 moles of chlorine can be produced.
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[tex]{ \red {\sf{Define \: Transportational}}}[/tex]
2+x=19
Find x
Easy!!
2+17=19
#hope that helps
Answer:
To find the answer you may
2+17=19
Explanation:
so that is the answer I'm sorry,to not give all the solutions
The store paid 4.50 for a book and sold it for $7.65.what is the profit as a percent of the cost to the store? A. 3. 15% b. 58.8% c. 70% d. 315%
Answer: This would be C.) 70%
Explanation:
What are three Possible overlaps that can occur during bond formation
Answer:
The Sigma (σ) Bond
S-S Overlapping. In this kind of overlapping, one 's' orbital from each participating atom undergoes head-on overlapping along the internuclear axis. ...
S-P Overlapping. ...
P-P overlapping.
Chlorine is a halogen and has 7 valence electrons, which is represented by crosses on the left
and dots on the right. You'll notice that their orbitals are overlapping and it looks almost like a
Venn Diagram. How many electrons are in the overlapping region?
There are 2 electrons in the overlapping region.
Chlorine is the second member of the halogen group which are form of family of elements that resemble one another very closely.
The electronic configuration of chlorine shows the arrangement of chlorine electrons within it's atom.
At the outer most shell of the atom is seven electrons, therefore requires only one electron each to attain the octet arrangement.
The overlapping of the orbitals indicates the chemical bond formed by sharing of electrons between atoms called covalent bonding.
To complete it's outer most shell, it will need to share electron with another chlorine atom.
Therefore, there are 2 electrons in the overlapping region.
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ou dissolve a 2.50 g penny in 50.0 mL of HNO3. After reacting overnight, you dilute the blue solution to a volume of 100 ml. You test a sample of this solution, and find that it has an absorbance of 0.12 abs at 635 nm. i Calculate the concentration of Cu
This question is describing an spectrophotometry experiment in which the concentration of copper(II) ions has to be determined when 2.50 g of a copper-rich penny is reacted with 50.0 mL of nitric acid. In addition, the absorbance of a sample of the solution turned out to be 0.12 at 635 nm, so that the concentration was estimated as 12.8 g/L.
First of all, we must recall the Beer's law that can be written as follows:
[tex]A=ebC[/tex]
Whereas A is the absorbance of the sample, e the molar absorptivity, b the cuvette's path and C the concentration. However, this problem is not providing sufficient information to calculate the required concentration, however, similar absorbance experiments have graphed (absorbance vs concentration) calibration curves exhibiting trendlines as the one shown below:
[tex]y=0.009647x-0.003655[/tex]
Thus, since y stands for the absorbance and x for the concentration but in g/L not M (mol/L) for those experiments, we can set y equal to 0.12 so we solve for x as the concentration of the copper(II) ions in the sample:
[tex]y=0.009647x-0.003655\\\\x=\frac{0.12+0.003655}{0.009647}\\\\x=12.8g/L[/tex]
Nevertheless, it would be great if you come up with your own trendline, having clear the units for the absorbance vs concentration graph and thus double check your results because the data was not enough for the time being.
Learn more:
(Beer's law and trendlines) https://brainly.com/question/5093710(Spectrophotometry) https://brainly.com/question/14467788