The mass of a molecule of oxygen ( ) is 16 times that of the mass of a molecule of…
PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
The mass of a molecule of oxygen ( O2 ) is 16 times that of the mass of a molecule of diatomic hydrogen ( H2 ). If the average speed of an oxygen molecule in the air at a temperature of 20 °C is about 500 ms−1 , then the average speed of a diatomic hydrogen molecule in the air at the same temperature is about
(1) 30 ms−1 .
(2) 125 ms−1 .
(3) 2000 ms−1 .
(4) 8000 ms−1 .