Stoichiometry and Percent Yield

Reactant and products might adhere to containers causing actual yield to be less than theoretical yield.

• true

• false

Some product may be lost during filtering causing your actual yield to be less than your theoretical yield.

• true

• false

When reacting Na with Cl₂, the theoretical yield should be 13 grams. The actual yield recovered was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.2 %

• 1.04%

Tags

NGSS.HS-PS1-7

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)

12.0 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂

• 576 g of O₂

• 288 g O₂

Tags

NGSS.HS-PS1-7

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
 What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

• 13.8 g O₂
• 3.86 mol of O₂
• 124 g O₂

2CO  +  O₂  −-> 2CO₂
How many liters of carbon dioxide are produced from 10L of carbon monoxide?

• 10
• 20
• 1
• 5

How many moles of aluminum would be needed to completely react with 45.0 grams of O₂? (You'll need a balanced equation)

• 1.05 moles

• 3.75 moles

• 2.27 grams

• 1.88 moles

Tags

NGSS.HS-PS1-7

How many liters of NH₃ are needed to react completely with 30.0L of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

• 5.0 L
• 20.0 L
• 7.5 L
• 120.0 L

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

In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?

• 82.1 %

• 0.99 %

• 10.1 %

• 122 %