Stoichiometry

A student burns 0.98 mol C₃H₈ according to the following reaction:C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

How many moles of water are produced?

• 3.92 moles water

• 0.245 moles water

• 0.527 moles water

• 0.198 moles water

A student burns 1.50 mol C₃H₈ according to the following reaction:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

How many grams of carbon dioxide are produced?

• 44.0 g

• 66.1 g

• 132 g

• 198 g

Tags

NGSS.HS-PS1-7

A student burns 25.0 g O₂ according to the following reaction: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

How many grams of H₂O are produced?

• 10.4 grams water

• 11.3 grams water

• 12.4 grams water

• 15.2 grams water

A student burns 1.25 g O₂ according to the following reaction: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

How many moles of CO₂ are produced?

• 0.0495 moles CO₂

• 0.0522 moles CO₂

• 0.0234 moles CO₂

• 0.0768 moles CO₂

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation?   P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4
• 4:6
• 1:3
• 3:1

Tags

NGSS.HS-PS1-7

How many grams are in 7.8 moles of NaCl?

• 476 grams

• 460 grams

• 452 grams

• 462 grams

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

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

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

• 6
• 2
• 3
• 1