$20 \, mL$ of $0.5 \, M \, HCl$ is mixed with $30 \, mL$ of $0.3 \, M \, HCl$. The molarity of the resulting solution is $......... \, M$.

Which of the following factors affect the molarity of a solution?

$10 \ g$ of a solute is dissolved in $90 \ g$ of a solvent. Its mass percent in solution is

When is the parts per million $(ppm)$ unit used?

Explain $\% \ V/V$ in brief.

Equal volumes of liquid $A$ $(d = 0.8 \ g/mL)$ and liquid $B$ $(d = 1.2 \ g/mL)$ are mixed to form a solution. Calculate the mole fraction of $A$ in the solution $(M_A = 16, M_B = 32)$.