Limiting & Stoichiometry

If 15 grams of copper (II) chloride react with 20 grams of sodium nitrate, how much sodium chloride can be formed? 

• 13.04 g
• 130.4 moles
• 130.4 g
• 13.04 moles

Tags

NGSS.HS-PS1-7

When you use a balanced chemical equation to calculate the amount of a product on paper it is referred to as the 

• experimental value
• theoretical value
• true amount
• percent yield

Tags

NGSS.HS-PS1-7

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

• 1.16%
• 116%
• 85%
• 76%

How many grams of ammonia (NH₃) can be produced from the reaction of 28 g of nitrogen gas and 25 grams of hydrogen gas? 

• 43 g
• 34 moles
• 25 grams
• 34 grams

Tags

NGSS.HS-PS1-7

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

• Mg
• H₂
• MgCl₂
• HCl

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
• 5.54 g NH₃