Stoich Quiz Review

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation
• Panic
• Write an Unbalanced Equation
• Avogadro's Number

Tags

NGSS.HS-PS1-7

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Tags

NGSS.HS-PS1-7

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6
• 2
• 3
• 1

In the reaction 2 H₂ + O₂ → 2 H₂O what is the mole ratio of oxygen to water?

• 1:2
• 2:1
• 3:4
• 4:3

Tags

NGSS.HS-PS1-7

A balanced chemical equation allows one to determine the

• mole ratio of any two substances in the reaction

• energy released in the reaction

• electron configuration of all elements in the reaction

• mechanism involved in the reaction

Tags

NGSS.HS-PS1-7

Determine the mass of calcium hydroxide produced when calcium carbide reacts with 0.64g of water according ot the following equation

CaC₂ + 2H₂O --> Ca(OH)₂ + C₂H₂

• 10.31 g Ca(OH)₂

• 41.31 g Ca(OH)₂

• 1.31 g Ca(OH)₂

• 31 g Ca(OH)₂

Tags

NGSS.HS-PS1-7

Determine the mass of lithium hydroxide produced when 0.38g of lithium nitride reacts with water according to the following equation

Li₃N + 3H₂O --> NH₃ + 3LiOH

• 11.78 g LiOH

• 0.78 g LiOH

• 12.78 g LiOH

• 21.78 g LiOH

How much mass is in a 3.25-mole sample of NH₄OH

• 10.8 g

• 34.0 g

• 114 g

• 35.1 g

Tags

NGSS.HS-PS1-7

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂

_How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

• 0.85 g

• 290 g

• 450 g

• 870 g

Tags

NGSS.HS-PS1-7

Use the following equation:

2Al + 3Cl₂ → 2AlCl₃

If 140 grams of aluminum chloride react, how many moles of aluminum will be produced?

• 5.10 moles of Al

• 1.05 moles of Al

• 2.25 moles of Al

• 3.42 moles of Al