Each molecule of testosterone contains 19 atoms of carbon (plus other atoms).The mass percent of carbon in testosterone is 79.12%.What is the molar mass of testosterone?
A)576.8 g/mol
B)180.5 g/mol
C)228.2 g/mol
D)240.1 g/mol
E)288.4 g/mol

Question

Quizplus · Accepted Answer

To find the molar mass of testosterone, use the mass percent of carbon and the number of carbon atoms. The molar mass of carbon is 12.01 g/mol, so 19 carbon atoms have a mass of 19 x 12.01 = 228.19 g/mol. Since carbon makes up 79.12% of testosterone, the total molar mass is 228.19 / 0.7912 = 288.4 g/mol.

Each Molecule of Testosterone Contains 19 Atoms of Carbon (Plus