Stoichiometry Practice 2

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

Identify the limiting reagent when 6.00 moles HCl combines with 5.00 moles Mg to form MgCl₂.
 
1 Mg +  2 HCl --> 1 MgCl₂  +  1 H₂   
 

• Mg
• H₂
• MgCl₂
• HCl

Theoretical yield = 73g

Actual yield = 62g

Calculate the percent yield.

• 116%

• 85%

• 1.16%

• 76%

A reaction was predicted to produce 32.4 grams of a compound. When the product was measured, there were only 26.1 grams made. What is the percent yield?

• 80.6%
• 6.3%
• 24.1%
• 58.5%

Cl₂ + 2 KBr → Br₂ + 2 KCl

How many grams of potassium chloride can be produced from 356 g of Cl₂ and 356 g of potassium bromide?

• 749 g

• 223 g

• 479 g

• 814 g

Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each. How many grams of silver phosphate are produced? 
3AgNO₃  + Na₃(PO₄)  --->  Ag₃(PO₄)  + 3NaNO₃

• 164 g
• 64 g
• 146 g
• 164 moles

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

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%
• 64%
• 27%
• 33%

0.666 g of Al reacts with 2.53 g of CuCl₂. How many grams of Al are left over after the reaction is complete?

• 0.328 g Al

• 0.338 g Al

• 0.666 g Al

• 4.98 g Al

Tags

NGSS.HS-PS1-7

If 0.666 g Al reacts with 2.53 g CuCl₂, and 1.01 g Cu are formed in the lab, what is the percent yield of Cu?

• 15.8 %

• 84.2 %

• 98.4 %

• 100.0 %

Tags

NGSS.HS-PS1-7