When 12 moles of O₂ reacts with 1.2 moles of C₁₀H₈ what is the limiting reactant?  C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

• Oxygen

• C₁₀H₈
• Water
• Carbon Dioxide

Tags

NGSS.HS-PS1-7

What is the limiting reactant if 16 moles of NH₃ and 30.0 moles of NO are combined?

4NH₃ + 6NO --> 5N₂ + 6H₂O

• NH₃

• NO

• N₂

• water

Tags

NGSS.HS-PS1-7

CH₄ + 2H₂O --> CO₂ + 4H₂

What is the limiting reactant when 21g CH₄ and 15g H₂O are combined? (CH₄ = 16.043 g/mol; H₂O = 18.015 g/mol)

• CH₄

• H₂O

• CO₂

• H₂

Tags

NGSS.HS-PS1-7

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are combined, identify the limiting reactant.

• AlCl₃

• Cl₂

• Al

Tags

NGSS.HS-PS1-7

P₄ + 3O₂ --> P₄O₆

What is the limiting reactant when 5 moles of P₄ and 18 moles of O₂ are combined?

• P₄

• O₂

• P₄O₆

• none of the above

Tags

NGSS.HS-PS1-7

Fe + S --> FeS

If 7.62g Fe and 8.67g S are combined, what is the limiting reactant? (Fe = 55.845 g/mol; S = 32.066 g/mol)

• Fe

• S

• FeS

• none

Tags

NGSS.HS-PS1-7

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

• Make sure the reaction is balanced

• Panic
• Write an unbalanced equation

• Avogadro's Number

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

• 6:4 (or 3:2 when reduced)

• 4:6 (or 2:3 when reduced)

• 1:3
• 3:1

Tags

NGSS.HS-PS1-7

This is what you call a reactant that you have plenty of. The one that DOES NOT run out.

• Limiting Reactant

• Excess Reactant

• Highly Reactant

• Super Reactant

A limiting reactant is a reactant that.....

• runs out during a chemical reaction

• causes a reaction to stop

• determines the amount of products that can be made

• all of these