Oxygen and cyclopropane at partial pressures orf 570 torr and 170 torr respectively are mixed in a gas cylinder. What is the ratio of the number of moles of cyclopropane to the number of moles of oxygen?

Options

A. 0.23
B. `0.19`
C. `0.39`
D. `0.30`

Answer

D

Explanation

(Partial pressure of `O_2 ` in a mixture = 570 torr
Partial pressure of cyclopropane = 170 torr
At constant volume and temperature , `P prop n`
`("No. of moles of cyclopropane")/("No. of moles of" O_(2)) = (170)/(570) = 0.30`