Answer:
B. Ksp = 1.7 × 10¯⁷
Explanation:
Hello there!
In this case, for this solubility equilibrium problem, we first need to set up the chemical reaction describing the dissolution of the involved salt, CuCl:
[tex]CuCl(s)\rightleftharpoons Cu^+(aq)+Cl^-(aq)[/tex]
Next, we write the corresponding equilibrium expression:
[tex]Ksp=[Cu^+][Cl^-][/tex]
Now, we need to calculate the concentrations of copper (I) and chloride ions at equilibrium; thus, given that 0.041 g of this solid is completely dissolved in 1.0 L of solution, we can firstly calculate the moles present in the solution:
[tex]n_{CuCl}=0.041gCuCl*\frac{1molCuCl}{99gCuCl} =4.14x10^-4mol[/tex]
Afterwards, since all the species in the reaction, CuCl, Cu+ and Cl- are in a 1:1:1 mole ratio, we realize that those moles correspond to ions in the solution, so their concentrations are:
[tex][Cu^+]=[Cl^-]=\frac{4.14x10^{-4}mol}{1.0L}= 4.14x10^{-4}M[/tex]
Then, we compute the Ksp by plug this value in the equilibrium expression:
[tex]Ksp=(4.14x10^{-4})(4.14x10^{-4})=1.7x10^{-7}[/tex]
Thus, the answer would be B. Ksp = 1.7 × 10¯⁷.
Regards!
All of the following variables related to the collection of blood may falsely increase the potassium levels EXCEPT:
Drawing a purple-top EDTA tube prior to a red-top tube.
Mixing the blood collection tube aggressively.
Pouring some sample from a purple-top EDTA tube into a red-top tube to make up for low collection volume.
Using a 21 G needle with a 10 mL collection tube.
All variables related to the collection of blood may falsely increase the potassium levels except Using a 21 G needle with a 10 mL collection tube.
What is purple top EDTA tube and red top tube?Purple red top EDTA is an inner tube covered with spray-dried K2EDTA. EDTA functions as an anticoagulant, binding calcium ions and interfering with blood coagulation.
Red top tube- There is no anticoagulant or preservative in this product. Serum or clotted whole blood might be used. Depending on the test, serum must be removed from cells within 45 minutes to two hours.
What is 21G needle?The most common gauge of needles used for routine blood draws and venipuncture is 21g. The gauge is small enough that it does not cause any pain or discomfort when used. Most patients' veins are of sufficient size and stability to accommodate the 21g needle.
All variables related to the collection of blood may falsely increase the potassium levels except Using a 21 G needle with a 10 mL collection tube
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12. Imagine that you are a particle of a perfume. Describe what happens to you when the bottle is opened and eventually someone smells you on the other side of the room. Your description should include, how you move, what other particles you might meet and where you go.
The process by which the molecules of the gas can be able to move is the process of diffusion.
What is diffusion?We know that according to the Graham's law, the rate of the diffusion of the gas is inversely proportional to the molar mass of the gas. When we open the bottles, the molecules of the perfume would begin to move.
As the bottle is opened, the molecules would escape from the bottle and then be able to travel through the room and get to where you are by the principle of diffusion.
Hence, the movement of the perfume is according to the Graham's law of diffusion in gases.
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write the equilibrium constant expression, kc, for the following reaction: if either the numerator or denominator is 1, please enter 1 pcl3 (g) cl2 (g) pcl5 (g)
If either the denominator or denominator is 1, the intermediate is given as Kc=[CH3OH]/[CO][H2]2, Kc[CO][H2]2.
What is an illustration of an equilibrium?A few instances of equilibrium include: a book that is open and resting on a table. a vehicle traveling at a set speed. a chemical process where the rates of the forward reaction and the reverse reaction are equal.
What does it mean for chemistry to be at equilibrium?Chemical equilibrium is the state during a reversible chemical process when there is no net change in the quantities of reactants and products. When a chemical reaction is reversible, the products react with the original reactants as soon as they are created.
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Any material listed in the cell notation that is not specifically oxidized or reduced is most likely: Select the correct answer below: an inert electrode an active electrode contained in the salt bridge none of the above
Any material listed in the cell notation that is not specifically oxidized or reduced is most likely an inert electrode.
When looking at the cell notation, any material that is not specifically indicated as either being oxidized or reduced is most likely an inert electrode. An inert electrode is a material that does not participate in the redox reactions taking place in the electrochemical cell. It is often used as a conductor to connect the anode and the cathode, but it does not take part in the reaction itself.
The other option, an active electrode, is a material that does participate in the redox reactions taking place in the electrochemical cell. This material can either be oxidized or reduced, depending on the circumstances. It is important to note that an active electrode is not always present in the cell notation.
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name the 3 similar parts of every amino acid. a. b. c.
All amino acids have the same amino, carboxyl, and carbon groups; the only characteristic that makes an amino acid different is the R-group.
Which three components do all amino acids share in common?There is a basic structure shared by all amino acids. A hydrogen atom, an R-group, or side-chain group, a basic amino group, a carboxylic acid group, and a central carbon atom are all connected to one another by a molecule. What differentiates amino acids is their R-group.
What do you call the three bases that encode an amino acid?An amino acid is encoded by a codon, a triplet of nucleotides. An amino acid is encoded by each trio of nucleotides.
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carbon footprint is the total amount of greenhouse gasses produced to support operations, usually expressed in equivalent tons of carbon dioxide (co2).
The entire amount of greenhouse gases created to sustain human activities both directly and indirectly, typically represented in equivalent tons of carbon dioxide (CO2).
In what context would you use the word "gasses"?On top of that, the planet's surface emits dangerous gases. Carbon dioxide, methane, tropospheric ozone, and nitrous oxide concentrations in the atmosphere have now increased significantly compared to pre-industrial levels as a result of human activity.
What does "gas" mean in the singular?A material that expands to fill any container is referred to as a gas, and the plural form of this term is gase. Third-person present tense verbs can have many different meanings, like "gasses."
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For the reaction A+B+C→D+E
, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected:
What is the value of the rate constant k for this reaction?
Answer:
the answer is a
Explanation:
A
because if u add
Successive Ionization
Energies (kJ/mol)
1st: 786.3
2nd: 1,580
3rd: 3,230
4th: 4,360
5th: 16,000
6th: 20,000
If this element is found in Period 3, what is its likely identity?
a. sodium
b. magnesium
c. aluminum
d. silicon
e. phosphorus
f. sulfur
g. chlorine
h. argon
Based on the information provided, the element with successive ionization energies of 786.3 kJ/mol, 1,580 kJ/mol, 3,230 kJ/mol, 4,360 kJ/mol, 16,000 kJ/mol, and 20,000 kJ/mol is likely to be aluminum (c).
Ionization energy is the energy required to remove an electron from an atom or a positive ion. It is a measure of the atom's tendency to lose electrons and is generally higher for atoms with a smaller atomic radius and a higher positive charge on the nucleus.
The ionization energies of the elements in Period 3 (the third row of the periodic table) are generally as follows:
Sodium (a): 496.1 kJ/mol (1st), 4,562 kJ/mol (2nd)
Magnesium (b): 738.1 kJ/mol (1st), 1,450 kJ/mol (2nd), 7,646 kJ/mol (3rd)
Aluminum (c): 578.8 kJ/mol (1st), 1,180 kJ/mol (2nd), 2,980 kJ/mol (3rd), 4,180 kJ/mol (4th)
Silicon (d): 786.5 kJ/mol (1st), 1,551 kJ/mol (2nd), 3,217 kJ/mol (3rd), 4,336 kJ/mol (4th), 9,900 kJ/mol (5th)
Phosphorus (e): 1,045 kJ/mol (1st), 2,079 kJ/mol (2nd), 3,169 kJ/mol (3rd), 6,491 kJ/mol (4th)
Sulfur (f): 1,112 kJ/mol (1st), 2,077 kJ/mol (2nd), 3,281 kJ/mol (3rd), 4,535 kJ/mol (4th)
Chlorine (g): 1,257 kJ/mol (1st), 2,362 kJ/mol (2nd), 3,595 kJ/mol (3rd), 4,906 kJ/mol (4th)
Argon (h): 1,521 kJ/mol (1st)
As you can see, the ionization energies of aluminum (c) are the closest match to the values given in the question. Therefore, the element is likely to be aluminum.
At 298.15 K, the Nernst equation can be rewritten to show that the nonstandard cell potential is equal to the standard cell potential minus:
(0.0257 Vn)lnQ
(0.0257 Vn)logQ
(0.0592 Vn)lnQ
none of the above
At 298.15 K, the Nernst equation can be written to show that the nonstandard cell potential is equal to the standard cell potential minus (0.0592 Vn) logQ.
This equation is essential in determining the thermodynamic properties of an electrochemical cell and the cell potential of a nonstandard cell. The Nernst equation is a fundamental equation used to calculate the cell potential of an electrochemical cell at a given temperature. At 298.15 K (25°C), the Nernst equation can be written as:
E = E0 - (0.0592 Vn) logQ
Where E0 is the standard cell potential, Vn is the number of moles of electrons transferred in the reaction, and Q is the reaction quotient. This equation states that the nonstandard cell potential (E) is equal to the standard cell potential (E0) minus (0.0592 Vn) logQ.
In addition, the Nernst equation can be used to calculate the cell potential of a nonstandard cell, which is the cell potential of a cell when the concentrations of reactants and products are not at standard conditions. By understanding the nonstandard cell potential, it is possible to determine how the cell potential is affected by changes in the concentrations of reactants and products.
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What would the seasons on Earth be like if Earth did not revolve around the Sun but stayed in one place in relation to the Sun?
It is thought that when molten copper is cooled and solidified it can take in some oxygen from the air. This may slightly decrease the conductivity of the copper.
Suggest why the conductivity might be decreased.
Answer:
When molten copper is cooled and solidified, it may take in some oxygen from the air. This process, known as oxidation, can lead to the formation of copper oxide (CuO) impurities in the copper. Copper oxide is an insulator, meaning that it does not conduct electricity as well as pure copper.
As a result, the presence of copper oxide impurities in the copper may slightly decrease the conductivity of the material. This is because the electrons in the copper atoms may have to travel through the insulating copper oxide impurities, which can slow down the flow of electricity and reduce the conductivity of the material.
The decrease in conductivity due to oxidation may be more pronounced in thin or highly purified copper wires, as these materials may have a higher surface area and may be more prone to oxidation. In contrast, thicker or less pure copper wires may have a lower surface area and may be less susceptible to oxidation, resulting in a lower impact on their conductivity.
Overall, the decrease in conductivity of molten copper due to oxidation is likely to be relatively small, but it can be an important factor to consider in applications where high conductivity is critical, such as in electrical wiring or electronic devices.
Which of the following properties is associated with the existence of glycine as a dipolar ion in aqueous solution?
A) High dipole moment
B) High molecular weight
C) Low dielectric constant
D) Low solubility in water
The property associated with the existence of glycine as a dipolar ion in aqueous solution is High dipole moment
What is dipole moment?Dipole moments occur when there is a separation of charge. Dipole moments can exist between two ions in an ionic bond or between atoms in a covalent link; they are caused by changes in electronegativity. The dipole moment grows in proportion to the difference in electronegativity.
According to the question,
Glycine exists as a "dipolar ion in aqueous solution." Polarity in neutral molecules is caused by an unequal distribution of electron density, which might result from the separation of opposite charges. This happens in zwitterions. Also, molecules that have strong electron-withdrawing or electron-donating substituents are highly polar and have high dipole moments.
The property associated with the existence of glycine as a dipolar ion in aqueous solution is High dipole moment.
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the information in the data table above represents two different trials for an experiment to study the rate of the reaction between no(g) and h2(g), as represented by the balanced equation above the table. which of the following statements provides the correct explanation for why the initial rate of formation of n2 is greater in trial 2 than in trial 1? assume that each trial is carried out at the same constant temperature
Compared to trial 1, trial 2, reactant molecule collisions occur more frequently.
What is meant by collision ?If the two molecules A and B are to interact, they must get close enough to each other that some of their current bonds will be broken and space will be left for any new bonds that will be required for the end products to form. A collision is the name given to such a meeting.
The collision theory postulates that the molecules of reactants are hard spheres, and that reactions can only take place when these spheres (molecules) clash with one another.
According to the collision theory, for a reaction to take place, the particles involved must collide the proper way around (with the correct orientation) and with sufficient force to cause the bonds between the reactants to be broken.
The complete question is : 2NO(g)+2H2(g)→N2(g)+2H2O(g)
The information in the data table above represents two different trials for an experiment to study the rate of the reaction between NO(g) and H2(g), as represented by the balanced equation above the table. Which of the following statements provides the correct explanation for why the initial rate of formation of N2 is greater in trial 2 than in trial 1 ? Assume that each trial is carried out at the same constant temperature.
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Xenon, Xe, forms a series of compounds with fluorine. The simplest of these compounds is XeF2. Which of the following would correctly characterize this compound?
The geometry of the molecule is linear.
The oxidation number of Xe is +4.
The molecule is more stable than XeCl2.
The molecule is soluble in nonpolar solvents.
The molecule as a whole is polar.
Xenon, Xe, forms a series of compounds with fluorine. The simplest of these compounds is XeF2.- Option 1 The geometry of the molecule is linear.
Xenon (Xe) is a chemical element that is a heavy and incredibly rare gas in Periodic Group 18 (noble gases). It was the first noble gas discovered capable of forming true different chemicals. Xenon, which is more than 4.5 times heavier than air, is colourless, flavourless, and tasteless. A molecule is a group of two or more atoms held together by covalent bond; depending on context, the word may or may not include ions that meet this criterion.
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What is the mass in grams of aluminum iodide that would be required to yield an actual amount of 80.25 grams of aluminum?
The mass in grams of aluminum iodide that is required to yield an actual amount of 80.25 grams of aluminum is 1407.89 grams
How to find theoretical yield?Let x represent the number of grams of aluminum iodide required to yield 73.75 grams of aluminum.
The charge on each aluminum ion is +3 while the charge on each iodide ion is -1. The empirical formula for aluminum iodide would be AH₃.
The relative atomic mass of aluminum and iodine on a modern periodic table is:
Al =26.982.
I = 126.904.
Therefore number of moles, n = mass, m / molar mass, M
molar mass of AH₃, M = 410.694
n = ( x / 410.694)
The number of grams of aluminum would be
mass = number of moles * molar mass
mass = (26.982 / 410.694)x g
Hence, the actual yield of aluminum would be:
Actual yield = percentage yield * theoretical yield
where:
theoretical yield = (26.982/410.694)x g
Actual yield = (26.982/410.694)x * 86.8%
Actual yield = 0.057x g
Since the actual yield is 80.25 g
0.057x g = 80.25
x = 1407.89 grams
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Question 4 of 16
What is the product(s) in the reaction below?
2Na(s)+2H₂O(I) → 2NaOH(aq)+H₂(g)
A. 2Na(s)+2H₂O(I)
B. 2H₂(g)
C. 2NaOH(aq)+H₂(g)
D. 2HO₂(I)
The product(s) in the reaction are: NaOH and H₂ (Option C)
How do I determine which is the product?Chemical equations are representations of chemical reactions. All chemical equations has two sides:
Reactants ProductsThe reactants are located on the left side while the products are located on the right side as shown below:
Reactants —> Products
With the above information, we can obtain the products of the reaction given in the question above. This is shown below:
2Na(s ) + 2H₂O(I) → 2NaOH(aq) + H₂(g)
The products are NaOH and H₂
Thus, the correct answer to the question is: 2NaOH(aq) + H₂(g) (Option C)
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What amount of energy is required to change
20.0 g of an unknown substance from -15.0 °C
to 7.0 °C? (More information on the picture!!)
The amount of energy that is required to change 20.0 g of an unknown substance from -15.0 °C to 7.0 °C is q = +49.65 kJ.
What is energy?Energy is the ability to do tasks. It can exist in various forms, including potential, kinetic, thermal, electrical, chemical, and nuclear.
At -15°c, it will be solid, to increase the amount of heat to raise
temp from -15°C to 40°C.
(20.0) (3.3J/g°c) x 15°C) = 330 J.
At -10°C, it is in which phase transformation takes place from sold to wound.
ΔHfue = 0.945 J/gx 20g = 18.93.
After that, it will be in want and it will be in liquid form 40°C.
To 7°C, then.
922 m Cgas 47
=(20g) (1455/g°c) (17)
493005.
Total Energy = q1 + ΔHfus + q2
47 = 7.0°C - 10°C) = 14°C -
2 330J18.95 + 49300J
q = 49648.9 3. 9
q = +49.65 KJ
Therefore, the amount of energy is q = +49.65 KJ.
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50.0 mL of a solution of hydrochloric acid (HCl) of unknown concentration reacts completely with 58.9 mL of 0.105 M sodium hydroxide (NaOH). What is the concentration of the hydrochloric acid?
The concentration of the hydrochloric acid solution is 0.124M.
How to calculate the concentration?The concentration of a solution can be calculated using the molarity equation as follows:
CaVa = CbVb
Where;
Ca = concentration of acidCb = concentration of baseVa = volume of acidVb = volume of baseAccording to this question, 50.0mL of a solution of hydrochloric acid (HCl) of unknown concentration reacts completely with 58.9 mL of 0.105 M sodium hydroxide (NaOH). The concentration of the hydrochloric acid can be calculated as follows:
50 × Ca = 58.9 × 0.105
50Ca = 6.185
Ca = 6.185/50
Ca = 0.124M
Therefore, 0.124M is the concentration of the hydrochloric acid solution.
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Pls help this is for my semester exam
This graph shows the melting and boiling points of the alkali metals. Think about Francium, do you think it would have a higher or lower melting/boiling
point than lithium? Why? Can you predict it from the data?
The melting point of francium was thought to be around 8.0 °C (46.4 °F); Additionally, 27 °C (81 °F) is frequently encountered. Due to its radioactivity and extreme rarity, the element's melting point is unknown. 20 1.5 °C (68.0 2.7 °F) was the result of a different extrapolation based on Dmitri Mendeleev's method.
Why is francium so soft to the touch?There are additional electron shells as you move down any group—for instance, Lithium has two shells and Francium has seven—that result in electron shielding. The force of attraction diminishes as it travels further through these shells to the outermost one, resulting in less powerful bonding.
Why do alkali metals have lower melting and boiling points?The weaker each metallic bond becomes, the lower the melting and boiling points become. The iotas in a metal are kept intact by the fascination of the cores to electrons which are delocalized over the entire metal mass.
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Classify the phrases. Does each phrase describe a kinase, a phosphatase, neither, or both?
You are currently in a sorting module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop.
O Kinases
O hosphatases
O Neither
O Both
An enzyme known as a kinase is responsible for protein phosphate group attachment.An enzyme called a phosphatase takes a phosphate group out of a protein. Complete answer is below the picture.
What distinguishes protein phosphatases from protein kinases?Enzymes that catalyze the transfer or phosphate between its substrates include protein kinases and phosphatases.A protein phosphatase catalyzes the transfer of phosphate from the a phosphoprotein to the a water molecule, whereas a protein kinase catalyzes the transfer of -phosphate form ATP (or GTP) towards its protein substrates.
What gives proteins their phosphoryl groups?As a result of the hydrolysis of adenosine triphosphate (ATP) and the enzymatic action of kinase, the protein acquires a phosphate group.This is the mechanism that underlies the development of post-translational modifications (PTMs).Additionally, phosphatase activity makes phosphorylation a reversible process.
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a proton placed at a and released from rest. the magnitude of the work done by the electric field in moving the proton from a to b is 1.7*10^-16
The proton's work done equals the inverse of the change in electric potential energy.
W=qVqV=W=qEscos =e(8.50102 N/C)(2.50m)(1)=3.3401016 J
To move an object, it must be transformed into energy. . Work done is the quantity of energy transmitted by a force to move an object. A proton is an elementary particle found in every atom's nucleus. The particle has a positive electric charge that is equal to and opposite to the electron's. A single proton has a volume of only 1.673? 10-27 kilogramme if isolated, which is slightly smaller than the mass of the a neutron. The proton is one of the three major particles that comprise the atom. Protons are discovered in the atom's nucleus.
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classify the following types of reactions as either ? a. combustionb. combinationc. decompositiond. single replacement
Combination: Two or more compounds combine to form one compound.
Combustion: Oxygen combines with a compound to form carbon dioxide and water.
Decomposition: In which a complex molecule breaks down to make simpler ones.
Displacement reaction: One element occurs with another element in the compound.
What are the types of reactions?A combination reaction is a reaction in which two or more compounds combine to generate one compound.
A + B → AB
A decomposition reaction is the opposite of a combination reaction in which a complex molecule breaks down to make simpler ones.
AB → A + B
A combustion reaction is a reaction in which oxygen combines with a compound to prepare carbon dioxide and water. These reactions are exothermic, they release heat.
A (hydrocarbon) + O₂ → H₂O + CO₂
Displacement reaction is the reaction in which one element is displaced with another element in the compound.
A + BC → AC + B
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what is a new substance produced by a chemical reaction
Answer:
Chemical change
Explanation:
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei, and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur.
Answer:
Product
Explanation:
choose the best reagent(s) from the list provided for carrying out the following transformations. place the corresponding letter in the box over the reaction arrow. (
The reaction described is the transformation of an aldehyde into an acid. Tollens reagent may be applied to carry out this change. In actuality, Tollens reagent is di-ammine-silver(I) complex (Ag(NH3)+2)Ag(NH3)+2).
What does the tollen chemical test for?Aldehydes are tested for using Tollens' reagent, an alkali solution of ammoniacal silver nitrate. Silver ions emerge from solution as both a brown deposit of silver(I) oxide, Ag2O, in the presence pf hydroxide ions (s).
What is tollens with Fehling's reactant?Compared to Fehling's reagents, Tollen's reagent has a stronger oxidizing solution. Unlike Fehling's test, which only works for aliphatic aldehydes, it can oxidize both and aromatic aldehydes. Ketones are not found in either test's results. Both assays are frequently used to determine whether reducing sugars are present.
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Write the reaction that takes place between Ammonia, NH3, and Acetic Acid, HCH3COO. Then determine the acid, base, conjugate acid and conjugate base.
The solution is a. CH3COOH as the acid and base conjugation in the reaction between ammonia and acetic acid −.
In the given chemical equation, acetic acid acts because the acid even as ammonia acts because the base.
The given chemical equation is an acid-base response. Specifically, it's miles an acid-base response among acetic acid and ammonia. In an acid-base response, it's miles crucial to factor out which chemical species are the acid, base, conjugate acid, and conjugate base. In the problem, it most effective desires to pick out the acid reactant and the conjugate base product.
Basically, the acetic acid donates a Hydrogen ion to ammonia to supply the ammonium ion. With this mechanism, we will classify acetic acid as an acid. The conjugate base of the response is the product this is derived from the acid reactant. In this state of affairs wherein acetic acid is the acid reactant, the conjugate base can be the acetate ion. The conjugate base has nearly a comparable chemical method to the acid. It is simply one much less Hydrogen atom as compared to acid. Therefore, the acid reactant is the acetic acid even as the conjugate base reactant is the acetate.
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Answer:
NH3 + HCH3COO --> CH3COO- + NH4+
NH3: base
HCH3COO: acid
CH3COO: conjugate base
NH4+: conjugate acid
Explanation:
We know acetic acid is an acid so that makes ammonia base. An acid donates a proton/,hydrogen so acetic acid will lose a hydrogen and become the conjugate base. Bases gain a proton and become conjugate acids.
Give practical this question answer
TO PREPARE BARIUM SULPHATE BY THE PRECIPITATION REACTION BETWEEN BARIUM CHLORIDE AND SULPHURIC ACID
Barium chloride react with sulfuric acid to produce barium sulfate and hydrogen chloride.
What is a Chemical reaction?This is referred to as the process in which one or more substance known as the reactants, are converted to one or more different substances which is called the products.
The reaction between Barium chloride and sulfuric acid which are the reactants form two products known as barium sulfate and hydrogen chloride under standard conditions so as to achieve a high yield and the equation can be seen below which is therefore the way in which this type of precipitation occurs in the laboratory.
BaCl₂+H₂SO₄→BaSO₄+2HCl.
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select the reasons why early molecular geneticists knew that the genetic material needed to be a stable molecule.
This allowed for exact replication. Genetic material has to be a stable molecule in order to be handed down from one generation to the next.
By the genetic, what do you mean?The study of how genes and characteristics are handed down from one generation to the next is known as genetics. Our health, looks, and even personality are all influenced by the information in our DNA! It all starts with genetics.
Which examples from genetics?The study of genes is called genetics. From one generation to the next, our genes transmit information. The reason one child has blonde hair like their mother while their sibling has dark hair like their father, for instance, is genetic.
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problem 8.49 briefly explain how each of the following influences the tensile or yield strength of a semicrystalline polymer and why: (a) molecular weight (b) degree of crystallinity (c) deformation by drawing
(a) The greater interconnectivity of a chains causes the tensile strength to rise with molecular weight.(b) As chain bonding develops, tensile strength rises with the degree of crystallinity.(c) Tensile strength rises when a material is deformed by drawing because the chains realign, increasing overall bonding forces.(d) The concomitant increase is crystallinity and consequently greater bonding causes the tensile strength of the an underformed material to increase with annealing.
How does a semicrystalline polymer's tensile modulus depend on the molecular weight?(A) As the molecular weight of a semicrystalline polymer grows, so does its tensile strength.Increased chain entanglements with higher molecular weights account for this phenomenon.
Would you anticipate polychlorotrifluoroethylene to have tensile strength?Since chlorine has a stronger bond with fluorine than fluorine does with oxygen, we would anticipate polychlorotrifluoroethylene to have higher tensile strength.
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a second chemist repeated the three experiments and observed that the reaction rates were considerably greater than those measured by the first chemist, even though the concentrations of the reactants and the temperature in the laboratory were the same as they were for the first chemist. which of the following is the best pairing of a claim about a most likely cause for the greater rates measured by the second chemist and a valid justification for that claim?
The second scientist must have introduced a catalyst to the reaction, opening up a new avenue for the reactant particles to engage in chemical reaction with a lower activation energy than the uncatalyzed reaction in the first chemist's trials.
Which term best describes concentration?The amount of a material in a certain area is referred to as concentration. A another way to think about concentration is as the proportion of a solution's solute to its entire solution or solvent.
Which instances of a concentrated solution are there?In a concentrated solution, the solute is present in significant levels relative to the solvent. Orange juice, brine solution, and black tea are a few examples. A diluted solution is one that has a little amount of solute and a lot of solvent. Salted water is one illustration.
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Which of the following is NOT a difference in the pathways by which fatty acids are degraded
and synthesized?
A. The location of the process
B. The presence or absence of a double bond
C. The molecule to which the chain being synthesized or degraded is attached
D. The number of carbons added or removed to elongate or shorten the existing fatty acid
chain
The presence or absence of a double bond is not a difference in the pathways by which fatty acids are degraded and synthesized. Therefore, option B is correct.
What is fatty acid ?A fatty acid is an aliphatic carboxylic acid having a saturated or unsaturated aliphatic chain. The majority of fatty acids that are found in nature contain an unbranched chain with an even number of carbon atoms, ranging from 4 to 28.
Triglycerides, cholesterol, and other critical fatty acids—what the medical community refers to as fats that the body cannot produce on its own—store energy, keep us warm, and safeguard our vital organs. They serve as messengers, facilitating the work that proteins do.
Thus, option B is correct.
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