Chapter 3, Problem 107IAE

Interpretation Introduction

Interpretation:

The mass percentage of ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}\cdot {\text{10H}}_{\text{2}}\text{O}$ should be calculated in the resulting mixture of anhydrous ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}$ and decahydrate.

Concept introduction:

Number of moles is equal to the ratio of given mass to the molar mass.

The mathematical expression is given by:

Number of moles = $\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of the molecule is equal to the sum of the masses of atoms present in the molecule.

Molecular formula is defined as the formula in which elements are present in actual numbers in a compound.