Q: What is the net ionic equation for the reaction between aqueous solutions of Na$$_2SO$_4$$ and BaCl$$_2$$?

$$\text{Ba}^{2+} (aq) + \text{SO}_4$$^{2-}$$ (aq) \rightarrow \text{BaSO}_4 (s)$$

Q: Which of the following is the correct balanced equation for the combustion of methane ($$\text{CH}_4$$)?

$$\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}$$

Q: Which of the following reactions is an example of a precipitation reaction?

$$\text{AgNO}_3(aq) + \text{NaCl}(aq) \rightarrow \text{AgCl}(s) + \text{NaNO}_3(aq)$$

Q: Which of the following is a correct net ionic equation for the reaction of hydrochloric acid with sodium hydroxide?

$$\text{H}^+ (aq) + \text{OH}^- (aq) \rightarrow \text{H}_2\text{O} (l)$$

Question 1

Which of the following best describes a redox reaction?

Accepted Answer

A reaction in which electrons are transferred from one species to another.

Question 2

Given the reaction: $$2	ext{Al}(s) + 3	ext{Cl}_2(g) ightarrow 2	ext{AlCl}_3(s)$$, what type of reaction is this?

Accepted Answer

Combination (synthesis)

Question 3

What is the molarity of a solution prepared by dissolving $$10.0\ 	ext{g} of $$NaCl in enough water to make $$500.0\ 	ext{mL} of $$solution? (Molar mass of NaCl = $$58.44\ 	ext{g/mol})$$

Accepted Answer

$$0.171\ 	ext{M}$$

Question 4

Which compound is insoluble in water according to solubility rules?

Accepted Answer

$$	ext{AgCl}$$

Question 5

What is the net ionic equation for the reaction between aqueous solutions of Na$$_2SO$_4$$ and BaCl$$_2$$?

Accepted Answer

$$	ext{Ba}^{2+} (aq) + 	ext{SO}_4$$^{2-}$$ (aq) ightarrow 	ext{BaSO}_4 (s)$$

Question 6

A reaction has a theoretical yield of $$5.00\ 	ext{g}$$ but only $$3.75\ 	ext{g} of $$product is actually obtained. What is the percent yield?

Accepted Answer

$$75.0\%$$

Question 7

Which of the following is the correct balanced equation for the combustion of methane ($$	ext{CH}_4$$)?

Accepted Answer

$$	ext{CH}_4 + 2	ext{O}_2 ightarrow 	ext{CO}_2 + 2	ext{H}_2	ext{O}$$

Question 8

Which of the following statements about gases is TRUE?

Accepted Answer

Gases are compressible and expand to fill their container.

Question 9

A sample of gas occupies $$4.00\ 	ext{L} at$$ $$1.00\ 	ext{atm}$$ and $$300\ 	ext{K}. $$What volume will it occupy at $$2.00\ 	ext{atm}$$ and $$300\ 	ext{K}$$?

Accepted Answer

$$2.00\ 	ext{L}$$

Question 10

Which of the following is the correct expression for the ideal gas law?

Accepted Answer

$$PV = nRT$$

Question 11

What is the oxidation number of sulfur in $$	ext{H}_2	ext{SO}_4$$?

Accepted Answer

$$+6$$

Question 12

Which of the following best describes Dalton’s Law of Partial Pressures?

Accepted Answer

The total pressure of a mixture of gases is the sum of the pressures each gas would exert if it were alone.

Question 13

Which of the following reactions is an example of a precipitation reaction?

Accepted Answer

$$	ext{AgNO}_3(aq) + 	ext{NaCl}(aq) ightarrow 	ext{AgCl}(s) + 	ext{NaNO}_3(aq)$$

Question 14

A $$2.00\ 	ext{L}$$ container holds $$0.100\ 	ext{mol} of $$oxygen gas at $$27^\circ	ext{C}. $$What is the pressure in the container? ($$R = 0.0821\ 	ext{L} \cdot 	ext{atm} / 	ext{mol} \cdot 	ext{K})$$

Accepted Answer

$$1.22\ 	ext{atm}$$

Question 15

Which of the following statements about effusion and diffusion is correct?

Accepted Answer

Lighter gases effuse and diffuse more rapidly than heavier gases.

Question 16

Which of the following is a correct net ionic equation for the reaction of hydrochloric acid with sodium hydroxide?

Accepted Answer

$$	ext{H}^+ (aq) + 	ext{OH}^- (aq) ightarrow 	ext{H}_2	ext{O} (l)$$

Question 17

A sample of hydrogen gas is collected over water at $$25^\circ	ext{C}$$ and a total pressure of $$755\ 	ext{mmHg}. $$The vapor pressure of water at $$25^\circ	ext{C} is$$ $$24\ 	ext{mmHg}. $$What is the partial pressure of hydrogen gas?

Accepted Answer

$$731\ 	ext{mmHg}$$

Question 18

Which of the following is the correct formula for calculating the density of a gas using the ideal gas law?

Accepted Answer

$$d = \frac{PM}{RT}$$

Question 19

Which of the following is NOT a property of an acid-base reaction?

Accepted Answer

It always produces a precipitate.

General Chemistry Study Guide: Chemical Reactions, Solutions, and Gases

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