The vapour pressure of a solution having 2.0 g of solute X (gram atomic mass=32 g/mol) in 100 g of CS2 (vapour pressure =854torr) is 848.9 torr.The molecular formula of solute 1) X 2)X2 3)X4 4)X8

Q. At ${48}^{o}C$, the vapour pressure of pure $C{S}_2$ in $850\text{torr}$. A solution of $2.0\text{g}$ of sulphur in $100\text{g}$ of $C{S}_2$ has a vapour pressure $844.9\text{torr}$. Determine the atomicity of sulphur molecule.

Q. 100 g of liquid $A$ (molar mass 140 g $mo{l}^{-1}$) was dissolved in 1000 g of liquid $B$ (molar mass 180 g $mo{l}^{-1}$) The vapour pressure of pure liquid $B$ was found to be 500 torr.

Q. $100g$ of liquid A (molar mass $140gmo{l}^{-1})$ was dissolved in $1000g$ of liquid B (molar mass $180gmo{l}^{-1})$. The vapour pressure of pure liquid B was found to be $500torr$. Calculate the vapour pressure of pure liquid A and its vapour pressure in the solution if the total vapour pressure of the solution is $475torr$.

Q. 5.8 g of a non-volatile solute was dissolved in 100g of carbon disulphide $\left(C{S}_2\right)$. The vapour pressure of the solution of the solution was found to be 190 mm of Hg. Calculate molar mass of solute given the vapour pressure of $\left(C{S}_2\right)$ is 195 mm of Hg.
[molar mass of $\left(C{S}_2\right)$ = 76 g mol${}^{-1}$]

Q.

QUESTION 2.36

100 g of liquid A (molar mass $140gmo{l}^{-1}$) was dissolved in 1000 g of liquid B (molar mass $180gmo{l}^{-1}$). The vapour pressure of pure liquid B was found to be 500 torr. Calculate the vapour pressure of pure A and its vapour pressure in the solution if the total vapour pressure of the solution is 475 torr.