Chemical Reactions and Stoichiometry Review

C₂H₄ + O₂ → CO₂ + H₂O

What type of reaction is shown in the skeleton equation above?

• synthesis

• decomposition

• single replacement

• double replacement

• combustion

What is the limiting reactant if 10 moles of NH₃  react  with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

• NH₃
• NO
• N₂
• water

Tags

NGSS.HS-PS1-7

When 12 moles of O₂ reacts with 1.1 mole of C₁₀H₈, what is the limiting reactant? C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

• Oxygen

• C₁₀H₈

• Water

• Carbon Dioxide

4NH₃ + 5O₂ --> 4NO + 6H₂O

How many grams of NO are formed if 0.765 g of ammonia (NH₃) react with excess oxygen?

• 0.37g

• 0.045g

• 1.35g

• 11.1g

Tags

NGSS.HS-PS1-7

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

When methane (CH₄) gas is burned in the presence of oxygen, the following chemical reaction occurs.

CH₄ + 2O₂ → CO₂ + 2H₂O

If 1 mole of methane reacts with 2 moles of oxygen, then

• 1 mole of CO₂ and 1 mole of H₂O are produced.

• 2 moles of CO₂ and 2 moles of H₂O are produced.

• 1 mole of CO₂ and 2 moles of H₂O are produced.

• 2 moles of CO₂ and 1 mole of H₂O are produced.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

How many moles of water are produced when 3.75 moles of oxygen reacts with excess hydrogen? 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