Statement-1: The weight percentage compound A in a solution is given by

$\mathrm{\%}\text{ of }\mathrm{A}=\frac{\text{ Mass }\mathrm{A}}{\text{ Total mass of solution }}\times 100$

Statement-2: The mole fraction of a component A is given by,

$\mathrm{Mole} \mathrm{fraction} \mathrm{of} \mathrm{A}=\frac{\text{ No. of moles of }\mathrm{A}}{\text{ Total No. of moles of all components }}$

The mass of a compound A relative to the total mass of the solution determines its percentage weight in the solution.

The formula for calculating a compound's % weight in a solution is

 $\mathrm{\%}\text{ of }\mathrm{A}=\frac{\text{ Mass }\mathrm{A}}{\text{ Total mass of solution }}\times 100$

Because

The ratio of the moles of a component A to the sum of the moles of all the other components in a solution is known as the mole fraction.

Given by, is the mole fraction of component A.

$\text{ Mole fraction of }\mathrm{A}=\frac{\text{ Number of moles of }\mathrm{A}}{\mathrm{T}\text{ otal number of moles of all components }}$

Both Assertion and Reason are true, yet Assertion cannot be explained by Reason.