Limited Reactants

What is a limiting reactant?

• the reactant that determines how much product can be made
• the reactant that is in excess
• the product that you can make the most of
• the amount of reactants that react with each other

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich.  If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

• bread
• jelly
• peanut butter
• sandwich

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

When 384g of oxygen reacts with 140.8g of C₁₀H₈ what is the limiting reactant? How much water is produced C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

• C₁₀H₈ Limiting_; 792g H₂O

• O₂ Limiting_; 128g H₂O

• C₁₀H₈ Limiting_; 44g H₂O

• O₂ Limiting_; 72g H₂O

Tags

NGSS.HS-PS1-7

Phosphorus (P) and liquid bromine (BR₂) react vigorously together to form phosphorus tribromide. If 5.0 g of phosphorus and 35 g of bromine react, how many grams of PBr₃ could be produced?

• 5 g PBr₃

• 79.0 g PBr₃

• 0.146 g PBr₃

• 39 g PBr₃

Tags

NGSS.HS-PS1-7