Stuck on #15:
which of the following solutions would exhibit the closet osmotic pressure to that of a 1.5 M NaCl solution at 300K, if the gas constant is 0.08212 L atm/mol- K^-1?
A. 1.0 M NaCl solution (i=1.9)
B. 2.0M NaCl solution (i=1.9)
C. 2.9M Sucrose solutioni (i=1.0)
D. 3.5M Sucrose solution (i=1.0)
Thanks in advance! 