Exploring Percent Composition Differences

A compound is made of 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. Another compound is made of 44.4% carbon, 6.2% hydrogen, and 49.4% oxygen by mass. Which compound has a higher percent composition of carbon?

• The first compound

• The second compound

• Both have the same percent composition of carbon

• Cannot be determined from the given information

Given two compounds, Compound X with a percent composition of 70% iron and 30% oxygen, and Compound Y with 60% iron and 40% oxygen, which compound has a higher percent composition of oxygen?

• Compound X

• Compound Y

• Both have the same percent composition of oxygen

• Cannot be determined from the given information

A sample of a compound contains 12 grams of carbon, 2 grams of hydrogen, and 16 grams of oxygen. Calculate the percent composition of hydrogen in the compound.

• 5%

• 6.25%

• 7.14%

• 8%

Tags

NGSS.MS-PS1-5

Compound A is composed of 50% sulfur and 50% oxygen by mass. Compound B is composed of 40% sulfur and 60% oxygen by mass. Which compound has a higher percent composition of sulfur?

• Compound A

• Compound B

• Both have the same percent composition of sulfur

• Cannot be determined from the given information

A compound is made of 24 grams of nitrogen and 76 grams of oxygen. Calculate the percent composition of nitrogen in the compound.

• 24%

• 31.58%

• 24.24%

• 76%

Two compounds, Compound C and Compound D, have the following percent compositions: Compound C is 20% hydrogen and 80% chlorine, while Compound D is 25% hydrogen and 75% chlorine. Which compound has a higher percent composition of chlorine?

• Compound C

• Compound D

• Both have the same percent composition of chlorine

• Cannot be determined from the given information

A compound contains 10 grams of sodium, 15 grams of chlorine, and 25 grams of oxygen. Calculate the percent composition of chlorine in the compound.

• 25%

• 30%

• 37.5%

• 50%

Compound E is composed of 30% calcium and 70% fluorine by mass. Compound F is composed of 35% calcium and 65% fluorine by mass. Which compound has a higher percent composition of calcium?

• Compound E

• Compound F

• Both have the same percent composition of calcium

• Cannot be determined from the given information

A compound is made of 18 grams of carbon, 2 grams of hydrogen, and 80 grams of oxygen. Calculate the percent composition of carbon in the compound.

• 15%

• 18%

• 20%

• 22.5%

Two compounds, Compound G and Compound H, have the following percent compositions: Compound G is 45% nitrogen and 55% oxygen, while Compound H is 50% nitrogen and 50% oxygen. Which compound has a higher percent composition of nitrogen?

• Compound G

• Compound H

• Both have the same percent composition of nitrogen

• Cannot be determined from the given information