Question

What is the rms speed of NO2 at 400K? The mass is 7.64
x10-26 kg/mole.

Answer 1

`C_(rms)=465.76\ m/s`

Step-by-step explanation:

The expression for the root mean square speed is:

`C_(rms)=\sqrt {\frac {3RT}{M}}`

R is Gas constant having value = 8.314 J / K mol

M is the molar mass of gas

Molar mass of
`NO_2` = 0.04599 kg/mol

Temperature = 400 K

Thus,

`C_(rms)=\sqrt{(3* 8.314* 400)/(0.04599)}`

`C_(rms)=\sqrt{(9976.8)/(0.04599)}`

`C_(rms)=465.76\ m/s`