At STP, pressure, `p=1 atm 1.013xx10^(5)Nm^(-2)`
Mass, `M=32g =32xx10^(-3) kg.`
Molar volume `V= 22.4 L =22.4xx10^(+3) kg.`
Toot mean square velocity of oxygen molecules at STP
`v_(rms)sqrt((3P)/(d))=sqrt((3pV)/(M))=sqrt((3xx1.013xx10^(-5)xx22.4xx10^(3))/(32xx10^(-3)))`
`v_(rms)=461.23 ms^(-1)`
