Chapter 20, Problem 43QAP

Interpretation Introduction

Interpretation:

The composition of Mn in the sample should be calculated in percent by mass.

Concept introduction:

The moles of any compound or element can be calculated by given formula:

$n=\frac{m}{M}$

Where n is number of moles, m is given mass and M is molar mass of the element/compound.

The molarity of any compound is the amount of solute dissolved in per liter of solution.

Hence,

$\text{M=}\frac{\text{moles of solute}}{\text{volume of solution in L}}$

Or,

$\text{moles of solute}=M\times \text{volume of solution in L}$

The mass % composition formula is used as:

$\text{Mass Percent=}\frac{\text{mass of element}}{\text{total mass of compound}}\times 100$