Question

A gaseous mixture contains CO2(g) and N2O(g) in 2 : 5 ratio by mass. The ratio of the number of molecules of CO2(g) and N2O(g) is :

• A. 5 :2
• B. 2 : 5
• C. 1 : 2
• D. 5 : 4

Answer 1

Answer: (B)

2 : 5

Answer 2

(2)

CO2(g) N2O(g)

Weight 2 w 5 w

No. of mole $\frac{2w}{44}$ $\frac{5w}{44}$

No. of molecule $\frac{2w}{44}$× NA $\frac{5w}{44}$× NA

Ratio 2 : 5