The mass of a gas molecule can be computed form the specific heat at constant volume. Take `C_(V) = 0.075 kcal kg^(-1) k^(-1)` for argon and calculate
a. the mass of an argon atom
b. the atomic weight of argon.

Explanation

`C_(v) = (R )/(gamma -1) = Mc_(v)`
`:. M xx (0.075 xx 1000) xx 42 = (8.3)/((5)/(3) - 1)`
`:.` Mass of one argon atom
`m = (M)/(N_(A)) = (39.65)/(6 xx 10^(23))`
`= 6.58 xx 10^(-23) g`