Percent Yield

Which is a positive result of the use of biotechnology in agriculture?

• increased cost

• increased yield

• increased use of pesticides

• increased use of preservatives

• 34

• 68

• 93

• 24

Tags

NGSS.HS-PS1-7

• 90

• 45

• 36

• 24

• 98

• 49

• 24

• 60

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%

• 80%

• 90%

• 95%

• 100%

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

What does percent yield indicate?

• The amount of product predicted

• The efficiency of the reaction

• The amount of product actually obtained

• Which reactant runs out first

Answer explanation

% Yield tells the efficiency of your work - how close you were to the theoretical value you should have gotten

A chemist interested in the efficiency of a chemical reaction would calculate the

• mole ratio

• rate of reaction

• percent yield

• energy released

Tags

NGSS.HS-PS1-6

Complete the equation for the percent yield of a chemical reaction:
Percent yield=(________)÷(________)×100%

• actual yield; theoretical yield

• theoretical yield; actual yield