Cortisone is a molecular substance containing 21 atoms of carbon per molecule. The mass percentage of carbon in cortisone is 69.98 % . Its molar mass is

Question

Cortisone is a molecular substance containing 21 atoms of carbon per molecule. The mass percentage of carbon in cortisone is 69.98 % . Its molar mass is (A) 176.5 (B) 252.2 (C) 287,6 (D) 360.1

Tardigrade Admin · Accepted Answer

Let molar mass be M. Mass of 21 carbon atoms =252 % of carbon =(252 × 100/M)=69.98 ⇒ M=360.1

Q. Cortisone is a molecular substance containing $21 a t o m s$ of carbon per molecule. The mass percentage of carbon in cortisone is $69.98%.$ Its molar mass is

176.5

252.2

287,6

360.1

Let molar mass be $M$ .

Mass of 21 carbon atoms $= 252$

$%$ of carbon $= \frac{252 \times 100}{M} = 69.98$

$\Rightarrow M = 360.1$

Q. Cortisone is a molecular substance containing 21atoms of carbon per molecule. The mass percentage of carbon in cortisone is 69.98%. Its molar mass is