clc
//initialisation of variables
mn= 0.0134 //gms
mo= 0.0261 //gms
mh= 0.0081 //gms
T= 30 //C
P= 3 //atm
r= 4/5
//CALCULATIONS
V= mn*(273+T)*1000/273
V1= V*r
V2= V1*P
V3= mo*(273+T)*(1-r)*P*1000/273
V4= mh*(273+T)*r*1000/273
V5= V4*P
V6= V2-V1
V7= V5-V4
//RESULTS
printf (' volume of oxygen= %.1f ml',V)
printf (' \n volume of nitrogen= %.1f ml',V3)
printf (' \n volume of helium = %.1f ml',V5)
printf (' \n volume of nitrogen and helium would be expelled = %.1f ml',V7)