Q: Which of the following is the correct net ionic equation for the reaction between AgNO$$_3(aq) $$and NaCl(aq)?

$$\text{Ag}^+(aq) + \text{Cl}^-(aq) \rightarrow \text{AgCl}(s)$$

Q: For the reaction $$\text{N}_2 + 3\text{H}_2 \rightleftharpoons 2\text{NH}_3$$, what is the correct equilibrium constant expression ($$K_{eq}$$)?

$$K_{eq} = \frac{[\text{NH}_3]^2}{[\text{N}_2][\text{H}_2]^3}$$

Question 1

A sample of 4.20 g of H$$_2$$ reacts with 6.67 g of N$$_2 in $$the Haber-Bosch process: $$3 	ext{H}_2 (g) + 	ext{N}_2 (g) ightarrow 2 	ext{NH}_3 (g). $$What is the theoretical yield of NH$$_3 (in $$grams)? (Molar masses: H$$_2 = 2.02 g/$$mol, N$$_2 = 28.02 g/$$mol, NH$$_3 = 17.03 g/$$mol)

Accepted Answer

4.84 g

Question 2

Which of the following best describes the molecular geometry of ammonia (NH$$_3) $$according to VSEPR theory?

Accepted Answer

Trigonal pyramidal

Question 3

A 15.0 mL sample of 3.50 M H$$_2SO$_4 is $$used to neutralize 80.0 mL of KOH. What is the molarity of the KOH solution? (Assume the reaction: $$2 	ext{KOH} + 	ext{H}_2	ext{SO}_4 ightarrow 2 	ext{H}_2	ext{O} + 	ext{K}_2	ext{SO}_4)$$

Accepted Answer

1.31 M

Question 4

Which intermolecular forces are present in CH$$_3F ($$fluoromethane)?

Accepted Answer

London dispersion and dipole-dipole

Question 5

Which of the following is the correct net ionic equation for the reaction between AgNO$$_3(aq) $$and NaCl(aq)?

Accepted Answer

$$	ext{Ag}^+(aq) + 	ext{Cl}^-(aq) ightarrow 	ext{AgCl}(s)$$

Question 6

A balloon contains 600 mL of air at 30$$^\circC. If $$the temperature is increased to 70$$^\circC at $$constant pressure, what is the new volume? (Use Charles's Law: $$\frac{V_1$}{T_1$} = \frac{V_2$}{T_2$}$$, temperatures in Kelvin)

Accepted Answer

672 mL

Question 7

Which of the following statements about radioactive decay is correct?

Accepted Answer

Alpha decay emits a helium nucleus

Question 8

For the reaction $$	ext{N}_2 + 3	ext{H}_2 ightleftharpoons 2	ext{NH}_3$$, what is the correct equilibrium constant expression ($$K_{eq}$$)?

Accepted Answer

$$K_{eq} = \frac{[	ext{NH}_3]^2}{[	ext{N}_2][	ext{H}_2]^3}$$

Question 9

Which of the following best describes the electron configuration of phosphorus (P, atomic number 15)?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^3$$

Question 10

A solution has $$[H^+] = 2.5 	imes 10$$^{-9}$$ M. What is the hydroxide ion concentration $$[OH^-]$$ at 25$$^\circ$$C? (Recall: $$[H^+][OH^-] = 1.0 	imes $$10^{-14})$$

Accepted Answer

$$4.0 	imes 10$$^{-6}$$ M

Question 11

Which of the following is true about exothermic reactions?

Accepted Answer

$$\Delta H \u003c 0$$ and energy is released

Question 12

In the redox reaction $$	ext{MnO}_4^-(aq) + 5 	ext{Fe}^{2+}(aq) + 8 	ext{H}^+(aq) ightarrow 	ext{Mn}^{2+}(aq) + 5 	ext{Fe}^{3+}(aq) + 4 	ext{H}_2	ext{O}(l)$$, which species is oxidized and what is its change in oxidation number?

Accepted Answer

Fe$$^{2+} is $$oxidized from +2 to +3

Question 13

Which of the following best describes the flow of electrons in an electrochemical cell?

Accepted Answer

From anode to cathode

Question 14

A gas sample has a pressure of 1140 mmHg, a temperature of 40$$^\circC$$, and contains 1.00 mol of krypton. What is its volume in liters? (Use $$R = 0.0821 L$$·atm/mol·K; 1 atm = 760 mmHg)

Accepted Answer

17.7 L

Question 15

Which of the following is a correct statement about isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons

Question 16

If the actual yield of NH$$_3 in a $$reaction is 4.80 g and the theoretical yield is 4.84 g, what is the percent yield?

Accepted Answer

99.2%

Question 17

Which of the following best describes a Bronsted-Lowry base?

Accepted Answer

A substance that accepts a proton (H$$^+)$$

Question 18

Which of the following changes will shift the equilibrium of $$	ext{N}_2 + 3	ext{H}_2 ightleftharpoons 2	ext{NH}_3 to $$the left (favoring reactants)?

Accepted Answer

Increasing the temperature (if the reaction is exothermic)

Question 19

Which of the following is the correct rate law for a reaction that is first order in A and second order in B?

Accepted Answer

$$	ext{rate} = k[A][B]^2$$

Honors/DC Chemistry Final Exam Review: Key Concepts and Problem-Solving Strategies (Chapters 1–17, Tro Textbook)

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