If one mole of a substance is present in $1 \ kg$ of solvent,then

The number of moles of a solute in its solution is $20$ and the total number of moles is $80$. The mole fraction of the solute is:

What is the relation between molality $(m)$ of the solution and molar mass $(M_2)$ of the solute,where $W_2$ is the mass of solute in grams and $W_1$ is the mass of solvent in grams?

What will be the molarity of a solution containing $5 \ g$ of sodium hydroxide in $250 \ mL$ solution?

$3.0\, g$ of oxalic acid $[(CO_2H)_2 \cdot 2H_2O]$ is dissolved in a solvent to prepare a $250\, mL$ solution. The density of the solution is $1.9\, g/mL$. The molality and normality of the solution,respectively,are closest to

Find out the mole fraction of glycerine in a solution containing $46 \ g$ of glycerine $(C_3H_8O_3)$ and $36 \ g$ of water $(H_2O)$.