Chem Stoichiometry Percent Yield

What mass of NaCl can be produced from 0.75 mol of chlorine gas (Cl2)?

• 0.75 g

• 1.5 g

• 44 g

• 88 g

Tags

NGSS.HS-PS1-7

What mass of carbon dioxide (CO2) can be produced from 25.0 g of calcium carbonate (CaCO3)?

• 25.0 g

• 11.0 g

• 22.0 g

• 56.0 g

Tags

NGSS.HS-PS1-7

If given the mass of methane (CH4) what can be calculated based on the balanced reaction below?

• The mass of the oxygen gas reacting along with the mass of carbon dioxide and water produced.

• Only the mass of carbon dioxide produced.

• Only the mass of oxygen gas reacting.

• Only the mass of ,carbon dioxide and water produced.

Tags

NGSS.HS-PS1-7

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

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

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

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

Tags

NGSS.HS-PS1-7

• 80%

• 90%

• 95%

• 100%

• 40.30 g

• 80.60 g

• 120.90 g

• 161.20 g

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

Tags

NGSS.HS-PS1-6