Question

If the density of oxygen is 1.44 `kg//m^(3)` at pressure of `10^(5)N//m^(2)`, then the root-mean-square velocity of oxygen molecules in m/s will be
A. 469
B. 456
C. 120
D. 270

Answer 1

Correct Answer - B
`C=sqrt((3P)/(rho))=sqrt((3xx10^(5))/(1.44))=(1.732xx3.13xx10^2)/(1.2)`
`=456m//s`.