Stoichiometry Test Review

In a laboratory experiment a student combines 25.0 g of zinc with 15.0 g of hydrochloric acid to form zinc chloride and hydrogen gas. Balance the chemical equation for this reaction.

• 1 Zn + 2 HCl → 1 ZnCl₂ + 1 H₂

• 2 Zn + HCl → ZnCl₂ + H₂

• Zn + HCl → ZnCl₂ + H₂

• 1 Zn + 3 HCl → ZnCl₂ + (1/2) H₂

Tags

NGSS.MS-PS1-5

In a laboratory experiment a student combines 25.0 g of zinc with 15.0 g of hydrochloric acid to form zinc chloride and hydrogen gas. What type of reaction is this?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Tags

NGSS.MS-PS1-2

In a laboratory experiment a student combines 25.0 g of zinc with 15.0 g of hydrochloric acid to form zinc chloride and hydrogen gas. Calculate the maximum mass of zinc chloride that can be produced from this reaction.

Tags

NGSS.HS-PS1-7

In a laboratory experiment a student combines 25.0 g of zinc with 15.0 g of hydrochloric acid to form zinc chloride and hydrogen gas. What is the limiting reactant?

• Zinc

• Hydrochloric acid

Tags

NGSS.HS-PS1-7

In a laboratory experiment a student combines 25.0 g of zinc with 15.0 g of hydrochloric acid to form zinc chloride and hydrogen gas. The theoretical yield would be 28.1 g of zinc chloride. If the student was only able to obtain 45.8 g of zinc chloride from the experiment, what is the percent yield?

Tags

NGSS.HS-PS1-7

Aluminum reacts with oxygen to form aluminum oxide. a) Balance the chemical equation for this reaction.

• 2 Al + 3 O → 1 Al₂O₃

• 4 Al + 1 O₂ → 2 Al₂O

• 2 Al + 3 O₂ → 2 AlO₃

• 4 Al + 3 O₂ → 2 Al₂O₃

Tags

NGSS.MS-PS1-5

Aluminum reacts with oxygen to form aluminum oxide. What type of reaction is this?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Aluminum reacts with oxygen to form aluminum oxide. Calculate the maximum mass of aluminum oxide that can be produced if 54.0 g of aluminum reacts with 48.0 g of oxygen.

Tags

NGSS.HS-PS1-7

In the production of ammonia, nitrogen gas reacts with hydrogen gas. Balance the chemical equation for this reaction.

• 1 N2 + 3 H2 → 2 NH3

• 2 N2 + 6 H2 → 3 NH3

• 1 N2 + 2 H2 → 2 NH3

• 2 N2 + 3 H2 → 3 NH3

Tags

NGSS.HS-PS1-7

In the production of ammonia, nitrogen gas reacts with hydrogen gas. What type of reaction is this?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement