Chapter 3, Problem 3.101QP

Interpretation Introduction

Interpretation: the final mass of iron bar and rust are needed to be determined when the 664g of iron bar undergoes rusting in the given process.

Concept introduction:

• Mole ratios between the reactants of a reaction are depends upon the coefficients of respective reactant in a balanced chemical equation.
• Equation for Number of moles of a substance, from its given mass is,

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

• Number of grams of a substance from its number of moles is,

$\text{Number of moles}\text{×}\text{Molecular}\text{mass in grams}\text{=}\text{Number}\text{of}\text{grams}$