Chapter 3.2, Problem 3.9BFP

Interpretation Introduction

Interpretation:

The name of an unknown metal $\text{M}$ and the compound ${\text{M}}_2{\text{S}}_3$ is to be determined.

Concept introduction:

The SI unit for amount of substance is $\text{mol}$. The mass and molar mass of a substance is used to calculate the amount of substance. The formula to calculate moles from the mass is as follows:

$\text{Amount}\left(\text{mol}\right)=\left(\text{Given mass}\left(\text{g}\right)\right)\left(\frac{1\text{ mol}}{\text{No}\text{. of grams}}\right)$

The name of a neutral coordination compound is written such that the name of the metal is written first followed by its oxidation number. The oxidation number is written in the roman numbers and is enclosed in parenthesis. After the oxidation number, the name of the anion is written.

The formula to calculate the molar mass is as follows:

$\text{Molar mass}\left(\text{g/mol}\right)=\frac{\text{mass}\left(\text{g}\right)}{\text{amount}\left(\text{mol}\right)}$ (1)