Percent Composition Quiz

What is the percent composition of carbon in methane (CH4)?

• 74.98%

• 50%

• 25%

• 90%

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

• 88.89%

• 10%

• 50%

• 75%

Determine the empirical formula of a compound that contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen.

• C2H4O2

• CHO2

• CH2O

• C3H6O3

Tags

NGSS.HS-PS1-3

Find the molecular formula of a compound with an empirical formula of CH2O and a molar mass of 180 g/mol.

• C3H6O3

• CH4O2

• C6H12O6

A compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. Determine its empirical formula.

• C2H4O2

• CHO2

• CH2O

• C3H6O3

Calculate the percent composition of nitrogen in ammonia (NH3).

• 75.4%

• 82.2%

• 63.8%

• 45.6%

A compound has an empirical formula of C2H4O and a molar mass of 88 g/mol. Determine its molecular formula.

• C3H6O

• C4H8O2

• C2H6O2

• C4H10O

Find the percent composition of sulfur in sulfuric acid (H2SO4).

• 32.67%

• 45.23%

• 18.56%

• 27.89%