Question

The number of moles of BaCO₃ which contains 1.5 moles of oxygen atoms is

(a) 0.5

(b) 1

(c) 3

(d) 6.02 × 10²³

Answer 1

Correct option is (a) 0.5

3 mole atoms of oxygen are present in 1 mole of BaCO₃.

So, 1.5 mole atoms of oxygen will be present in = 1/3 x 1.5 = 0.5 mole of BaCO₃.