$3.65 \ g$ of $HCl$ is dissolved in $16.2 \ g$ of water. The mole fraction of $HCl$ in the resulting solution is ......

If the mole fraction of the solute in benzene is $0.2$,then the molality of the solution will be ..............

Explain $\% \, w/V$ and $\% \, w/w$ in brief.

Molarity of $4\%$ $NaOH$ solution is ......... $M$.

What type of solution is obtained from an amalgam of mercury with sodium?

$25 \ mL$ of $3.0 \ M \ HNO_3$ are mixed with $75 \ mL$ of $4.0 \ M \ HNO_3$. If the volumes are additive,the molarity of the final mixture would be ......... $M$.