The formula for the illegal drug cocaine is C17H₂1NO₄ (303.39 g/mol).What is the percentage of oxygen in the compound?

Question

Quizplus · Accepted Answer

The percentage of an element in a compound is calculated by (mass of the element in 1 mole of the compound / molar mass of the compound) * 100%. For oxygen in cocaine (C17H21NO4), there are 4 oxygen atoms, each with an atomic mass of approximately 16.00 g/mol, giving a total mass of 64.00 g/mol for oxygen. The molar mass of cocaine is 303.39 g/mol. Thus, the percentage of oxygen is (64.00 g/mol / 303.39 g/mol) * 100% = 21.09%.

The Formula for the Illegal Drug Cocaine Is C17H₂1NO₄ (303