What is the molar mass of a substance; if 0.4 mole of the substance has a mass of 25.0g?

A. 62.5 g
B. 40.0 g
C. 6.3 g
D. 2.5 g

Correct Answer:

Option A – 62.5 g

Explanation

0.4 → 25

1 mole → ? = 1/0.4 X 25/1 = 250/1 = 62.5 g