import math
from __future__ import division
#initialisation of variables
T= 20 #C
R= 0.082 #li-atm per mole per degree
V= 2 #lit
m= 6 #gms
M= 60 #gms
#CALCULATIONS
P= m*R*(273+T)/(M*V)
#RESULTS
print"osmotic pressure=",round(P,1),"atm";
import math
from __future__ import division
#initialisation of variables
T= -0.2 #C
T1= 25 #C
T2= 1.86 #C
R= 0.082 #li-atm per mole per degree
#CALCULATIONS
P= -T*R*(T1+273)/T2
#RESULTS
print"osmotic pressure=",round(P,2),"atm";