Question

The number of gram molecules of oxygen in 6.02 x 10²⁴ CO molecules is 

(a) 10 g molecules 

(b) 5 g molecules 

(c) 1 g molecules 

(d) 0.5 g molecules.

Answer 1

The correct option is : (b) 5 g molecules 

Explanation :

Avogadro's No.,N_A = 6.02 x 10²³ molecules.

.^. . 6.02 x 10²⁴ CO molecules = 10 moles CO

= 10 g atoms of O = 5 g molecules of O₂ 

Answer 2

Correct option is B

6.02×10^23 molecules -> 1 g molecule

So 6.02×10^24 molecules ->10 g molecules

Now 1 g molecule  CO contain 1/2 g molecule Oxygen

So 10 g molecules CO contain 5 g molecules Oxygen.