If the mole fraction of a solute in liquid naphthalene $(C_{10}H_8)$ is $0.2$,then the molality of the solution will be .............. $m$.

What volume (in $mL$) of $3.0 \ M \ H_2SO_4$ is required to prepare $1.0 \ L$ of a $1.0 \ M$ solution?

The molarity of a solution of $Na_2CO_3$ having $10.6 \ g$ in $500 \ mL$ of solution is ......... $M$.

Define the following modes of expressing the concentration of a solution: Mass percentage,Molarity,Molality,and Mole fraction. Which of these modes are independent of temperature and why?

$A$ solution is obtained by mixing $400 \ g$ of $25 \%$ solution and $600 \ g$ of $40 \%$ solution by mass. What is the mass percentage of the resulting solution (in $\%$)?

When the concentration is expressed as the number of moles of a solute per litre of solution,it is known as: