Stoichiometry, Limiting Reactant, & Percent Yield Quiz

CH₄  +  2O₂  →  CO₂  +  2H₂O
24 grams of CH₄ was added to the above reaction. Calculate the theoretical yield of CO₂.

• 66 grams
• 132 grams
• 33 grams
• 8.72

Tags

NGSS.HS-PS1-7

The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting

• Percent
• actual
• stoichiometry
• theoretical

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-6

2Fe₂O₃ + 3C → 4Fe + 3CO₂

You add 28 grams of carbon. You find the actual yield to be 81.2 grams of CO₂. What is the percent yield of CO₂? (Hint: calculate theoretical yield of CO₂ first)

• 58.83%

• 308%

• 6435%

• 79.14%

Tags

NGSS.HS-PS1-7

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

• 1.16%
• 116%
• 85%
• 76%

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%

Tags

NGSS.HS-PS1-7

Lead nitrate can be decomposed by heating.  What is the % yield of the decomposition reaction if 7.4g Pb(NO₃)₂ are heated to give 4.1 g PbO?
2Pb(NO₃)_{2 (s)}→2PbO_(s)+4NO_2(g)+O_2(g)

• 82%
• 44%
• 56%
• 67%

Tags

NGSS.HS-PS1-2

What is the formula for percent yield?

If you are converting from grams of substance A to grams of substance B, drag the correct order of the conversion process:

​ (a)   ---> ​ (b)   ---> ​ (c)   ---> ​ (d)  

• Grams A
• Moles A
• Moles B
• Grams B

Tags

NGSS.HS-PS1-7

Based on the following equation and question, choose the actual yield:

 $Zn\ \ +\ \ 2HCl\ \ \ \rightarrow\ \ \ ZnCl_2\ \ +\ \ H_2$

20 g of  $ZnCl_2$(136.286 g/mol) is formed in a lab. What is percent yield if 10 g of HCl (36.453 g/mol) is consumed?

• 44.5%

• 35.4%

• 10.6 %

• 26.8 %

Tags

NGSS.HS-PS1-7

Calculate percent yield based on the following information:

Actual Yield: 50

Theoretical Yield: 60

• 0.8333 %

• 83.33 %

• 120 %

• 1.2 %

Tags

NGSS.HS-PS1-7