The mass of 6 million atoms of a diatomic gas is 5.1 $\times$ 10^-19 kg.What is the atomic mass of this gas?

Question

Quizplus · Accepted Answer

The mass of 6 million atoms (3 million molecules) is 5.1 x 10^-19 kg. The mass of one molecule is 5.1 x 10^-19 kg / 3 million = 1.7 x 10^-25 kg. The atomic mass of one atom is half of this, which is 8.5 x 10^-26 kg. Converting to atomic mass units (1 u = 1.66 x 10^-27 kg), the atomic mass is 8.5 x 10^-26 kg / 1.66 x 10^-27 kg/u = 51.0 u.

The Mass of 6 Million Atoms of a Diatomic Gas ×\times×

The Mass of 6 Million Atoms of a Diatomic Gas $\times$