What is the cell potential?a. the difference in reduction potentials of the half-cells

b. the difference in oxidation potentials of the half-cells

c. the sum of reduction potentials of the half-cells

d. the sum of the oxidation of potentials of the half cells

Answers

Answer 1

Answer: The correct answer is the difference in reduction potentials of the half-cells.
E(cell)=E(cathode)-E(anode).

You can also think of it as the reduction potential of the cathode plus the oxidation potential of the anode since if you reverse the sign of the reduction potential you have the oxidation potential
example E(cathode)=0.7V and E(anode)=-1.2V. E(cell)=0.7V+1.2V=1.9V
(the reduction potential for the anode is -1.2V but the oxidation potential is 1.2V)

I hope this helps. Let me know if anything is unclear.

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Which describes the relationship between [H+] and [OH−] ?

Answers

There are quite a fewrelationships between [H+] and [OH−]ions. And because there is a large range of number between 10 to 10-15M, the pH is used. pH = -log[H+] and pOH = -log[OH−]. In aqueous solutions, [H+][OH- ] = 10-14. From here we can derive the values of each concentration.

-log[H+ ] + -log[OH- ] = -log[10-14]
pH + pOH = 14
So pH = 14 – pOH and pOH = 14 –pH

A neutral solution occurs when pH= pOH = 7. It is an acid solution when [H+ ] > [OH- ], pH < 7 and basic when [H+ ] < [OH- ], pH> 7.

H+ is for an acid, which has a pH of 1-7. OH- is for a base, called hydroxide, and has a pH of 7-14.

pH 7 is neutral.

Which of the following observations led physicist James Chadwick to perform experiments that eventually led to the discovery of the neutron?A. Protons alone were not able to account for the density of an atoms nucleus.

B. Atomic nuclei possess shells similar to the electron shells of atoms.

C. Some atoms contained more protons than electrons.

Answers

The correct answer is letter C. James Chadwick confirmed the existence of neutrons.In his experiment, he was able to show that the particles that were ejected had no electrical charge but had almost the same mass as the proton. These particles were, of course, neutrons.

An element X has two isotopes. X–15 has 7 protons and 8 neutrons. Determine the atomic number and mass number of the second isotope, which has 10 neutrons in its nucleus. a. atomic number = 8; mass number = 9
b. atomic number = 8; mass number = 17
c. atomic number = 7; mass number = 17
d. atomic number = 7; mass number = 15

Answers

c. Atomic number = 7; mass number = 17

The atomic number of the first isotope is 7.

Isotopes of the same element have the same atomic number, so the atomic number of the second isotope must also be 7.

Mass number = no. of protons + no. of neutrons, or

A = p + n

∴ A = 7 + 10 = 17

Options “a.” and “b.” have the wrong atomic numbers, and option “d.” has the wrong mass number.

Answer:

Explanation:

Write a balanced equation for each of the following reactions:the reaction of solid lithium with nitrogen to form solid lithium nitride.
the reaction between aqueous solutions of cobalt(III) nitrate and sodium hydroxide to form aqueous sodium nitrate and solid cobalt(III) hydroxide.
the reaction between solid zinc and aqueous hydrochloric acid in a single replacement reaction.
classify the reactions in (a) and (b).

Answers

Synthesis Reaction

6Li(s) + N₂(g) ⇒ 2Li₃N(s)

Double Replacement Reaction

Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s)

Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)

What is double replacement reaction?

A double-displacement reaction has the general formula AB + CD = AD + BC. Double-displacement reactions include the following examples: Ammonium Chloride, a salt, and sodium hydroxide, a base, combine to produce sodium chloride, hydrochloric acid, and water. In a double replacement process, the atoms of two compounds are switched, creating two new molecules.
Metals always replace metals, and nonmetals always replace nonmetals in single replacement processes.
Precipitates are frequently created by double replacement reactions when insoluble chemicals are created.
Checking to see if the cations exchanged anions with one another is the simplest technique to determine whether a reaction is a double displacement.
If the states of matter are mentioned, another indicator to look for is the production of a single solid product and watery reactants (since the reaction typically generates a precipitate)

To learn more about double replacement reaction, refer

brainly.com/question/23918356

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6Li(s) + N₂(g) ⇒ 2Li₃N(s) Synthesis Reaction

Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s) Double Replacement Reaction

Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)

Suggest two ways to liquefy the gases.

Answers

There are two ways to liquefy a gas:

-- Increase the pressure on it.

-- Lower its temperature.

The liquefication is faster and easier if you do both.

Classify each of the following statements as an experiment, a hypothesis, a scientific law, an observation, or a theory. For example, Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide (N2O) or nitrogen monoxide (NO). Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product. In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure. In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules. By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions

Answers

Answer:

Classify each of the following statements as an experiment, a hypothesis, a scientific law, an observation, or a theory.

(1) For example, Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide (N2O) or nitrogen monoxide (NO). Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product.

(2) In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure.

(3) In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules.

(4) By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions

The correct answers to the question are as follows

(1) An experiment

(2) A scientific law

(3) A hypothesis

(4) A theory

Explanation:

(1) An experiment

A scientific experiment involves the development of procedures to verify an hypothesis

(2) A scientific law

A scientific law is a description or general rule to explain an observed phenomenon using a mathematical or verbal statement without attempting to provide an explanation

(3) A hypothesis

An hypothesis is an explanation of an observed phenomenon which can then be tested through the performance of experiments

(4) A theory

A theory in science is an explanation of naturally occurring phenomenon backed up by the results of experiments and observation

Final answer:

The given statements have been classified as experiment (1), observation (2), scientific law statement (3), hypothesis (4), and theory (5) respectively in the context of Chemistry.

Explanation:

1. Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide or nitrogen monoxide: This is an experiment.

2. Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product: This is an observation.

3. In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure: This is a statement of a scientific law.

4. In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules: This is a hypothesis.

5. By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions: This is a theory.