Mastering Percent Composition in Chemistry

What is the percent composition of carbon in ethane (C2H6)?

• A) 75%

• D) 90%

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

• B) 11.1%

• D) 33.3%

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

• C) 50%

• B) 60.66%

Determine the percent composition of nitrogen in ammonium nitrate (NH4NO3).

• B) 35.00%

• C) 28.13%

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

• D) 10%

• B) 20%

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

• B) 40.00%

• A) 32.69%

What is the percent composition of calcium in calcium carbonate (CaCO3)?

• C) 20%

• A) 40%

Calculate the percent composition of aluminum in aluminum oxide (Al2O3).

• A) 52.93%

• B) 47.07%

What is the mass percent of magnesium in magnesium chloride (MgCl2)?

• D) 35.35%

• A) 25.53%

Determine the percent composition of potassium in potassium permanganate (KMnO4).

• C) 44.76%

• B) 34.76%