Question 1

Which of the following best explains why chemical equations must be balanced?

Accepted Answer

To ensure the total mass of reactants equals the total mass of products, reflecting the law of conservation of mass.

Question 2

A student mixes aqueous solutions of silver nitrate ($$\mathrm{$$AgNO_3$$}) $$and sodium chloride ($$\mathrm{NaCl}). $$What is the net ionic equation for the precipitation reaction that occurs?

Accepted Answer

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

Question 3

Which of the following compounds is most likely to be insoluble in water according to typical solubility rules?

Accepted Answer

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

Question 4

If 2.00 mol of $$\mathrm{H_2$}$$ reacts with 1.00 mol of $$\mathrm{O_2$} to $$form water, what is the limiting reactant?

Accepted Answer

$$\mathrm{O_2$}$$

Question 5

A student dissolves 0.50 mol of $$\mathrm{NaCl} in $$enough water to make 1.00 L of solution. What is the molarity of the solution?

Accepted Answer

$$0.50\ \mathrm{M}$$

Question 6

Which of the following is a strong electrolyte?

Accepted Answer

$$\mathrm{NaCl} (aq)$$

Question 7

Calculate the percent yield if 3.00 g of product is obtained from a reaction with a theoretical yield of 4.00 g.

Accepted Answer

$$75\%$$

Question 8

Which equation correctly relates the pressure, volume, and temperature of an ideal gas?

Accepted Answer

$$PV = nRT$$

Question 9

A sample of gas occupies 10.0 L at 2.00 atm. What will its volume be at 1.00 atm, assuming temperature is constant?

Accepted Answer

$$20.0\ \mathrm{L}$$

Question 10

Which of the following is the correct formula for calculating the density of a gas at STP?

Accepted Answer

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

Question 11

A 2.00 L solution contains 0.50 mol of $$\mathrm{KBr}. $$What is the molarity of the solution?

Accepted Answer

$$0.25\ \mathrm{M}$$

Question 12

Which of the following is NOT a type of chemical reaction discussed in the study materials?

Accepted Answer

Redox reaction

Question 13

A solution is prepared by diluting 100.0 mL of 2.00 M $$\mathrm{HCl} to a $$final volume of 500.0 mL. What is the final concentration?

Accepted Answer

$$0.40\ \mathrm{M}$$

Question 14

Which gas law describes the relationship between the volume and temperature of a gas at constant pressure?

Accepted Answer

Charles's Law: $$\dfrac{V_1$}{T_1$} = \dfrac{V_2$}{T_2$}$$

Question 15

Which of the following is a weak electrolyte?

Accepted Answer

$$\mathrm{CH_3COOH} (aq)$$

Question 16

At STP, what volume does 3.00 mol of an ideal gas occupy?

Accepted Answer

$$67.2\ \mathrm{L}$$

Question 17

Which of the following is a spectator ion in the reaction between $$\mathrm{Na_2SO_4}$$ and $$\mathrm{$$BaCl_2$$} in $$aqueous solution?

Accepted Answer

$$\mathrm{Na^+}$$

Question 18

A 5.00 g sample of $$\mathrm{O_2$}$$ gas is collected at 1.00 atm and 273 K. What volume does it occupy?

Accepted Answer

$$3.50\ \mathrm{L}$$

Question 19

Which of the following equations is used to solve dilution problems?

Accepted Answer

$$M_1V_1 = M_2V_2$$

General Chemistry Study Guide: Chemical Reactions, Stoichiometry, and Gas Laws

Guida di studio - Domande di pratica

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