Calculating Percent Composition

What is the percent composition of carbon in carbon dioxide (CO2)?

• 27.3%

• 28.6%

• 29.3%

• 30.0%

If a compound is made of 40% sulfur and 60% oxygen by mass, what is the percent composition of sulfur?

• 40%

• 50%

• 60%

• 70%

Calculate the percent composition of hydrogen in water (H2O).

• 11.1%

• 22.2%

• 33.3%

• 44.4%

A sample contains 10g of hydrogen and 90g of oxygen. What is the percent composition of oxygen?

• 90%

• 80%

• 70%

• 60%

What is the percent composition of nitrogen in ammonia (NH3)?

• 82.4%

• 17.6%

• 14.3%

• 85.7%

In a compound with a molar mass of 180 g/mol, 72 g/mol is carbon. What is the percent composition of carbon?

• 40%

• 50%

• 60%

• 70%

Calculate the percent composition of oxygen in glucose (C6H12O6).

• 53.3%

• 44.4%

• 48.9%

• 50.0%

A compound is composed of 24g of carbon, 4g of hydrogen, and 32g of oxygen. What is the percent composition of hydrogen?

• 5%

• 10%

• 15%

• 20%

Tags

NGSS.MS-PS1-1

What is the percent composition of chlorine in sodium chloride (NaCl)?

• 60.7%

• 39.3%

• 50.0%

• 70.0%

If a compound has a molar mass of 100 g/mol and contains 20 g/mol of hydrogen, what is the percent composition of hydrogen?

• 20%

• 30%

• 40%

• 50%