Online Practice: Chemical Reactions and Stoichiometry

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

AP Chemistry Problems
Complete this practice problem set using only your AP Chemistry formula sheet and periodic table. Do not use a calculator.

According to the information in the table above, a 10.0 g sample of which of the following contains the lowest mass of chlorine? *

1 point

AgCl

AlCl₃

LiCl

NaCl

A 3.0 mol sample of CS₂(g) and a 16.0 mol sample of H₂(g) are placed in a previously evacuated vessel, where they react according to the equation below. After one of the reactants has been totally consumed, how many moles of H₂S(g) have been produced? *

1 point

3.0 mol

6.0 mol

8.0 mol

19.0 mol

Substance X is an unknown metal cation with a +1 charge. A student dissolves the bromide salt of the unknown cation, XBr, in enough water to make 100. mL of solution. The student then mixes the solution with excess AgNO₃ solution, causing AgBr to precipitate. The student collects the precipitate by filtration, dries it, and records the data shown below. Determine the identify of unknown metal X. (The molar mass of AgBr is 188 g/mol.) *

1 point

Sodium, Na

Potassium, K

Rubidium, Rb

Lithium, Li

In the reaction represented below, the number of NO₃⁻ ions that react must be equal to which of the following? *

1 point

Four times the number of Zn²⁺ ions that are produced

Three times the number of water molecules that are produced

Ten times the number of H⁺ ions that are consumed

One fourth the number of Zn atoms that are consumed

A 45.0 g sample of a compound contains 24.0 g of C, 7.0 g of H, and 14.0 g of N. Which of the following is the empirical formula of the compound? *

1 point

C₂H₇N

C₄H₁₄N₂

CHN

C₄H₂N

The particle model below shows the results of combustion of a hydrocarbon. Which of the following could be the empirical formula of the hydrocarbon? *

1 point

C₄H₁₀

CH₂

C₈H₂₀

C₂H₅

When a student adds 300. mL of 1.0M H₂SO₄ to 2.7 g of solid Al, a reaction occurs according to the equation below. When the reaction is complete at 273K and 1.0 atm, which of the following is true? *

1 point

0.10 mol of Al₂(SO₄)₃ has been produced.

H₂SO₄ is in excess, and 0.15 mol H₂SO₄ remains unreacted.

H₂SO₄ is in excess, and 0.20 mol H₂SO₄ remains unreacted.

6.7L of H₂ has been produced.

Clear form

This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy

Forms