What is the mole fraction of the solute in $2.5 \ m$ aqueous solution?

The density of a solution containing $13 \%$ by mass of $H_2SO_4$ is $1.09 \ g/mL$. The molarity and normality of the solution are respectively :-

The normality of a solution of sodium hydroxide,$100 \ mL$ of which contains $4 \ g$ of $NaOH$,is:

If $138 \ g$ of ethanol is mixed with $72 \ g$ of water,the ratio of the mole fraction of alcohol to water will be ..........

For the solution formed by dissolving a solid in water,choose the correct option regarding the following statements: Statement-$1$: $A$ $1$ molal aqueous glucose solution contains $180 \ g$ of glucose in $1000 \ g$ of water. Statement-$2$: $A$ solution containing $1$ mole of solute in $1000 \ g$ of water is called a $1$ molal solution.

$A$ solution of a solute in benzene has a molality of $X \ m$. If the mole fraction of the solute is $0.2$,what is the value of $X$?