Wednsday Exam Practice Questions

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

• 1.16%
• 116%
• 85%
• 76%

Tags

NGSS.HS-PS1-7

What is the formula for percent yield?

Tags

NGSS.HS-PS1-7

What is Percent yield?

• the percent of Carbon in a substance

• the percent ratio of actual yield to the theoretical yield

• the percent ratio of reacted and unreacted substances

• 6.022 x 10^23

Tags

NGSS.HS-PS1-7

7. The amount of product that actually forms when a chemical reaction is carried out in a laboratory is called the _________ yield.

• actual
• theoretical
• percent

Converting from grams C₂H₁₈ to grams CO₂ , the first conversion factor has grams of what on the bottom

• C₂H₁₈

• CO₂

• O₂

• H₂O

Tags

NGSS.HS-PS1-7

The middle conversion factor is the

• mole ratio of C₂H₁₈ to CO₂

• molar mass of CO₂

• molar mass of O₂

• combination lock of your locker

Tags

NGSS.HS-PS1-7

If you predicted that 1.5 moles of magnesium are used in a reaction, and you have 2.0 moles of magnesium , what type of reactant is magnesium?

• Limiting Reactant

• Excess Reactant

• Fast Reacter

• Non-Reactant

For a chemical reaction, percentage yield represents the 

• efficiency.
• rate,
• speed.
• individual steps.

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield
• mole ratio
• actual yield
• percentage yield

Tags

NGSS.HS-PS1-7

Identify the limiting and excess reactants in the reaction shown.

• N₂ is limiting and H₂ is excess. 

• H₂ is limiting and N₂ is excess. 

• NH₃ is both limiting and excess.

• There is no limiting reactant. 

Tags

NGSS.HS-PS1-7