Stoichiometry Retest

The starting materials in a chemical equation.

• mole

• reactants

• stoichiometry

• mole ratio

The coefficients of a balanced equation tell us the relative number of ____.

• grams of reactants and products.

• molecules of reactants and products.

• moles of reactants and products.

• liters of reactants and products.

Tags

NGSS.HS-PS1-7

Conversion factor that allows you to convert between moles of one compound and moles of another compound.

• mole

• reactants

• stoichiometry

• mole ratio

In the reaction CH₄ + 2O₂ → CO₂ + 2H₂O , how many moles of water are produced with 2 moles of CH₄?

• 1

• 2

• 3

• 4

Given the following equation, how many moles of ammonia (NH₃) are formed?

N₂ + 3H₂ → 2NH₃

• 1

• 2

• 3

• 4

How many moles of water are produced when 3.75 moles of oxygen are used? 2 H₂ + O₂ → 2 H₂O

• 16.0 moles H₂O

• 7.5 moles H₂O

• 5.75 moles H₂O

• 2 moles H₂O

What mass of hydrogen is required to produce 25.0 moles of water?

2H₂ + O₂ → 2H₂O

• 25 g H₂

• 50 g H₂

• 75 g H₂

• 100 g H₂

What mass of oxygen is needed to completely react with 75.0 g of hydrogen?

2 H₂ + O₂ → 2 H₂O

• 300 g O₂

• 1200 g O₂

• 600 g O₂

• 2400 g O₂

Tags

NGSS.HS-PS1-7

How many moles of oxygen react with 12.5 g of hydrogen 2H₂ + O₂ → 2H₂O

• 3.13 moles O₂

• 13.0 moles O₂

• 6.25 moles O₂

• 25.0 moles O₂

4NH₃ + 5O₂ --> 4NO + 6H₂O
How much excess reactant is leftover after if 6.30g of ammonia react with 1.80g of oxygen? 

• 9.75 g NH₃
• 4.80 g O₂
• 0.765 g NH₃
• 5.54 g NH₃