Percent Yield and Limiting Reactant

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

Tags

NGSS.MS-PS1-5

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

• 1.16%
• 116%
• 85%
• 76%

Tags

NGSS.HS-PS1-7

P₄ + 3O₂ --> P₄O₆ 
What is the limiting reactant is 12 moles of P₄ react with 15 moles of O₂?

• P₄
• O₂
• P₄O₆ 
• none of the above

Tags

NGSS.HS-PS1-7

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
• 5.53 g NH₃

Tags

NGSS.HS-PS1-7

4NH₃ + 5O₂ --> 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen? 

• 0.37g
• 0.045g
• 1.35g
• 11.1g

Tags

NGSS.HS-PS1-7

P₄ + 6Cl₂ --> 4PCl₃ 
The reaction of 75.0g P₄ with excess chlorine gas produces 110g PCl₃ in lab. Find the theoretical yield and calculate percent yield for the reaction. 

• 78.8%

• 64.2%

• 27.6%

• 33.1%

Tags

NGSS.HS-PS1-7

C₃H₈ + 5O₂ --> 3CO₂ + 4H₂O
How much carbon dioxide is produced when 3.0g of propane is burned in 2.1g of oxygen? 

• 1.7g

• 0.038g
• 2.9g
• 0.90g

Tags

NGSS.HS-PS1-7

2 NaCl + Pb(NO₃)₂ --> 2 NaNO₃ + PbCl₂
 
How many grams of lead II chloride are produced from the reaction of 15.3 g of NaCl and 60.8 g of Pb(NO₃)₂? 

• 21.5g
• 51.1g
• 43.4g
• 36.4g

Tags

NGSS.HS-PS1-7

CH₄ + 2H₂O --> CO₂ + 4H₂
What is the limiting reactant when 20g CH₄ react with 15g H₂O?

• CH₄
• H₂O
• CO₂
• H₂

Tags

NGSS.HS-PS1-7

The limiting reactant

• slows the reaction down
• is used up first
• is the reactant that is left over
• controls the speed of the reaction