Chemistry Stoichiometry Percent Yield

For the reaction pictured how many moles of nitrogen gas (N2) are required to produce 18 mol of ammonia (NH3)?

• 18

• 9.0

• 4.5

• 36

Tags

NGSS.HS-PS1-7

What is the correct ratio of nitrogen gas to lithium in the reaction pictured?

• 
• 
• 
• 

Given the pictured equation, how may moles of hydrogen gas (H2) would be produced from 1.00 mole of Zinc (Zn) if there was a 85.0% yield?

• .850 mole

• .750 mole

• 1.00 mole

• There is no way to determine this answer.

Tags

NGSS.HS-PS1-7

Which is true of the reaction shown below?

• Two molecules of Substance Y will be left over when this reaction goes to completion.

• Substance Y is the limiting reagent in this reaction.

• The addition of more molecules of Substance X will not affect the amount of Substance Z that can be made.

• The mole ratio of this reaction is 6:5:6.

Tags

NGSS.HS-PS1-7

In a chemical reaction, the theoretical yield is 50 grams, but the actual yield is 40 grams. What is the percent yield?

• 80%

• 75%

• 85%

• 90%

Tags

NGSS.HS-PS1-7

When reacting Na with Cl₂, the theoretical yield of NaCl is 13.0 grams. The actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.1%

• -3.9%

Answer explanation

Tags

NGSS.HS-PS1-7

Where is the mole to gram ratio for AlCl3 in this set up? (pick one)

Tags

NGSS.HS-PS1-7

Which of the following reactions has the lowest percent yield?

• Predicted yield 25.7g, actual yield 23.2g

• Predicted yield 18.2g; actual yield 15.6g

• Predicted yield 42.1g; actual yield 39.9g

• Predicted yield 93.4g; actual yield 102.3g

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

• stoichiometry

• actual

• predicted

Tags

NGSS.HS-PS1-7

• 56.08 g

• 112.16 g

• 168.24 g

• 224.32 g

Tags

NGSS.HS-PS1-7