Question

5.
Cortisone is a molecular substance containing 21 atoms of
carbon per molecule. The mass percentage of carbon in
cortisone is 69.98%. What is the molar mass of cortisone?
(a) 176.5
(b) 252.2
(c) 287.6
(d) 360.1​

Answer 1

Answer:

252

Explanation:

becouse 1 carbon atom has molar mass is 12 then 12 is divided by 21 then we'll find 252 mean answer is 252