At $400 \ K$ temperature in a closed vessel,the $\%$ by volume of $He, Ne$,and $Ar$ are $40\%, 40\%$,and $20\%$ respectively. If the total pressure is $25 \ bar$,find the partial pressure of each gas.

• A
  $p_{He} = 10 \ bar, p_{Ne} = 10 \ bar, p_{Ar} = 5 \ bar$
• B
  $p_{He} = 5 \ bar, p_{Ne} = 10 \ bar, p_{Ar} = 10 \ bar$
• C
  $p_{He} = 10 \ bar, p_{Ne} = 5 \ bar, p_{Ar} = 10 \ bar$
• D
  $p_{He} = 20 \ bar, p_{Ne} = 2 \ bar, p_{Ar} = 3 \ bar$