Question 1

Which of the following best describes the relationship between pressure and volume for a fixed amount of gas at constant temperature (Boyle's Law)?

Accepted Answer

$$P V = k$$

Question 2

A 200.0 mL sample of 1.20 M HCl is diluted to a final volume of 800.0 mL. What is the final concentration of HCl?

Accepted Answer

$$0.30\ \mathrm{M}$$

Question 3

Which of the following is the correct chemical formula for iron(III) oxide?

Accepted Answer

$$\mathrm{Fe_2O_3}$$

Question 4

Which of the following compounds is insoluble in water?

Accepted Answer

$$\mathrm{$$BaSO_4$$}$$

Question 5

What is the correct formula for the phosphate ion?

Accepted Answer

$$\mathrm{PO_4$^{3-}}$$

Question 6

Which of the following best defines an empirical formula?

Accepted Answer

The simplest whole-number ratio of atoms of each element in a compound.

Question 7

What is the name of the acid $$\mathrm{H_2C_2O_4}$$?

Accepted Answer

Oxalic acid

Question 8

Which of the following is the balanced chemical equation for the combustion of octane ($$\mathrm{C_8H_{18}}$$)?

Accepted Answer

$$2\ \mathrm{C_8H_{18}} + 25\ \mathrm{O_2$} \rightarrow 16\ \mathrm{CO_2$} + 18\ \mathrm{H_2O}$$

Question 9

In stoichiometry, what does the term 'mole ratio' refer to?

Accepted Answer

The ratio of the coefficients of reactants and products in a balanced chemical equation.

Question 10

Approximately how many moles of ideal gas are in a 9.0 L container at STP?

Accepted Answer

$$0.40\ \mathrm{mol}$$

Question 11

Which of the following is the correct balanced equation for the photosynthesis reaction in which carbon dioxide and water react to form glucose and oxygen?

Accepted Answer

$$6\ \mathrm{CO_2$} + 6\ \mathrm{H_2O} \rightarrow \mathrm{C_6H_{12}O_6$} + 6\ \mathrm{O_2$}$$

Question 12

How many moles of $$\mathrm{NO_2$}$$ are formed when 1.68 kg of $$\mathrm{N_2O_5}$$ completely decomposes? Use the equation: $$2\ \mathrm{N_2O_5}(s) \rightarrow 4\ \mathrm{NO_2$}(g) + \mathrm{O_2$}(g).$$

Accepted Answer

$$20.0\ \mathrm{mol}$$

Question 13

A sample of gas contains a mixture of inert gases with mole fractions of $$x_A = 0.25$$, $$x_B = 0.15$$, $$x_C = 0.60. If $$the total pressure is $$800.0\ \mathrm{atm}$$, what is the partial pressure of gas B?

Accepted Answer

$$120\ \mathrm{atm}$$

Question 14

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of $$\mathrm{Pb(NO_3$)_2}$$ and $$\mathrm{KI}$$?

Accepted Answer

$$\mathrm{Pb$$^{2+}$$(aq) + 2I^-(aq) \rightarrow $$PbI_2$$(s)}$$

Question 15

Which of the following statements about Graham's Law of Effusion is correct?

Accepted Answer

The rate of effusion of a gas is inversely proportional to the square root of its molar mass.

Question 16

Which of the following is the limiting reactant when 12.1 mol of sodium and 7.3 mol of bromine react according to the equation: $$2\ \mathrm{Na} + \mathrm{Br_2$} \rightarrow 2\ \mathrm{NaBr}$$?

Accepted Answer

Bromine

Question 17

Which of the following best describes the oxidation state of chromium in $$\mathrm{Cr_2O_7$$^{2-}$$}$$?

Accepted Answer

+6

Question 18

Which of the following is a spectator ion in the reaction between $$\mathrm{Pb(NO_3$)_2}$$ and $$\mathrm{KI} in $$aqueous solution?

Accepted Answer

$$\mathrm{K^+}$$

Question 19

A student mixes 0.100 mol of $$\mathrm{Pb(NO_3$)_2}$$ with 0.200 mol of $$\mathrm{KI} in $$solution. What is the limiting reagent?

Accepted Answer

$$\mathrm{KI}$$

General Chemistry Exam 2 Study Guide: Chemical Reactions, Gases, Stoichiometry, and Solution Chemistry

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