Question

A gases mixture contains oxygen and nitrogen in the ratio `1 : 4` by weight. Therefore, the ratio of the number of molecules is:
A. `1:4`
B. `1:8`
C. `7:32`
D. `3:16`

Answer 1

Correct Answer - C
Moles of molecules of `O_(2). N_(2) = (1)/(32) : (4)/(28)`
`= (1)/(32) : (1)/(7) = (7)/(32) : 1 = 7:2`