Each molecule of cortisone contains 21 atoms of carbon (plus other atoms).The mass percentage of carbon in cortisone is 69.98%.What is the molar mass of cortisone?

Question

Quizplus · Accepted Answer

The molar mass of carbon is approximately 12 g/mol. For 21 atoms of carbon, the total mass is 21 * 12 = 252 g. Given that carbon makes up 69.98% of cortisone's mass, we can set up the equation 252 = 0.6998 * Molar Mass of Cortisone. Solving for the molar mass gives us approximately 360.4 g/mol.

Each Molecule of Cortisone Contains 21 Atoms of Carbon (Plus