76 / 104 119%
Question 2
The root-mean-square speed (thermal speed) of a certain sample of carbon dioxide molecules, with
a molecular weight of 44 g/mol, is 396 m/s. What is the root-mean-square speed (thermal speed) of
water vapor molecules, with a molecular weight of 18 g/mol, at the same temperature?
(1) 253 m s.
(2) 396 m s.
(3) 421 m s.
(4) 619 ms.
(6) None of the above,