The specific heat at constant volume for the monoatomic argon is $0.075 \, kcal/kg-K$,whereas its gram molecular specific heat $C_V = 2.98 \, cal/mole/K$. The mass of the argon atom is (Avogadro's number $= 6.02 \times 10^{23} \, molecules/mole$)

• A
  $6.60 \times 10^{-23} \, g$
• B
  $3.30 \times 10^{-23} \, g$
• C
  $2.20 \times 10^{-23} \, g$
• D
  $13.20 \times 10^{-23} \, g$