Q: Which of the following is the correct net ionic equation for the reaction between aqueous solutions of $\\ce{AgNO3}$ and $\\ce{NaCl}$?

$\\ce{Ag^+ (aq) + Cl^- (aq) -> AgCl (s)}$

Q: Which of the following is a balanced equation for the combustion of propane ($\\ce{C3H8}$) in oxygen?

$\\ce{C3H8 + 5 O2 -> 3 CO2 + 4 H2O}$

Q: Which of the following acids is considered a strong acid?

Hydrochloric acid ($\\ce{HCl}$)

Q: Which of the following is the correct sequence for converting grams of a compound to number of molecules?

Grams $\\to$ Moles $\\to$ Number of molecules

Q: Which of the following is a decomposition reaction?

$\\ce{2 KClO3 -> 2 KCl + 3 O2}$

Question 1

Which of the following statements best describes the limiting reactant in a chemical reaction?

Accepted Answer

It is the reactant that determines the amount of product formed because it is completely consumed first.

Question 2

A student mixes 0.50 mol of $\ce{Na2SO4}$ with 0.30 mol of $\ce{BaCl2}$ in water. The reaction is:

$\ce{Na2SO4 (aq) + BaCl2 (aq) -> 2 NaCl (aq) + BaSO4 (s)}$

Which compound is the limiting reactant?

Accepted Answer

$\ce{BaCl2}$

Question 3

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of $\ce{AgNO3}$ and $\ce{NaCl}$?

Accepted Answer

$\ce{Ag^+ (aq) + Cl^- (aq) -> AgCl (s)}$

Question 4

A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the empirical formula of this compound?

Accepted Answer

$\ce{CH2O}$

Question 5

Which of the following best describes an electrolyte?

Accepted Answer

A substance that produces ions when dissolved in water, allowing the solution to conduct electricity.

Question 6

What is the molarity of a solution prepared by dissolving 10.0 g of $\ce{NaOH}$ (molar mass = 40.0 g/mol) in enough water to make 500.0 mL of solution?

Accepted Answer

$0.50$ M

Question 7

Which of the following is a balanced equation for the combustion of propane ($\ce{C3H8}$) in oxygen?

Accepted Answer

$\ce{C3H8 + 5 O2 -> 3 CO2 + 4 H2O}$

Question 8

A solution is prepared by diluting 25.0 mL of 6.00 M $\ce{HCl}$ to a final volume of 100.0 mL. What is the final concentration?

Accepted Answer

$1.50$ M

Question 9

Which of the following acids is considered a strong acid?

Accepted Answer

Hydrochloric acid ($\ce{HCl}$)

Question 10

A sample contains $3.01 \times 10^{23}$ molecules of $\ce{CO2}$. How many moles of $\ce{CO2}$ are present?

Accepted Answer

$0.50$ mol

Question 11

Which of the following compounds is insoluble in water according to the solubility rules?

Accepted Answer

$\ce{AgCl}$

Question 12

What is the percent by mass of oxygen in $\ce{H2O}$? (Molar mass of $\ce{H2O}$ = 18.0 g/mol)

Accepted Answer

$88.9\%$

Question 13

A reaction has a theoretical yield of 10.0 g, but only 7.5 g of product is actually obtained. What is the percent yield?

Accepted Answer

$75\%$

Question 14

Which of the following is the correct molecular formula for a compound with an empirical formula of $\ce{CH2}$ and a molar mass of 56 g/mol?

Accepted Answer

$\ce{C4H8}$

Question 15

Which of the following best describes a neutralization reaction?

Accepted Answer

A reaction in which an acid and a base react to form water and a salt.

Question 16

How many grams of $\ce{CaCl2}$ (molar mass = 111 g/mol) are needed to prepare 0.250 L of a 2.00 M solution?

Accepted Answer

$27.8$ g

Question 17

Which of the following is the correct sequence for converting grams of a compound to number of molecules?

Accepted Answer

Grams $\to$ Moles $\to$ Number of molecules

Question 18

A student performs a combustion analysis and finds that burning 1.00 g of a hydrocarbon produces 3.14 g of $\ce{CO2}$ and 1.29 g of $\ce{H2O}$. What is the empirical formula of the hydrocarbon?

Accepted Answer

$\ce{CH4}$

Question 19

Which of the following is a decomposition reaction?

Accepted Answer

$\ce{2 KClO3 -> 2 KCl + 3 O2}$

Question 20

Which of the following statements about strong and weak acids is correct?

Accepted Answer

A strong acid completely ionizes in water, while a weak acid only partially ionizes.

Chemistry 2045 Exam 2 Study Guide: Chemical Reactions, Stoichiometry, and Solutions

Study Guide - Practice Questions

Study Guide - Flashcards