Chapter 3, Problem 3.105P

(a)

Interpretation Introduction

Interpretation:Masses of braunite and manganosite in ore is to be calculated.

Concept introduction:The formula to convert moles to mass in grams is as follows:

  $\text{Mass}=\left(\text{Number of moles}\right)\left(\text{molar mass}\right)$

Reaction between total mass of sample and mass percent is as follows:

  $\text{Mass}=\left(\text{Total mass of sample}\right)\left(\frac{\text{Mass percent}}{100}\right)$

(b)

Interpretation Introduction

Interpretation:Ratio of ${\text{Mn}}^{3+}{\text{/Mn}}^{2+}$ in ore is to be calculated.

Concept introduction:The formula to convert moles to mass in grams is as follows:

  $\text{Mass}=\left(\text{Number of moles}\right)\left(\text{molar mass}\right)$