Chapter 3, Problem 3.163QP

Interpretation Introduction

Interpretation:

The mass of ${\mathrm{Fe}}_2{O}_3$formed and ${\mathrm{KClO}}_3$decomposed should be determined when$\text{15g}$ of iron sample is used and 17.9g of $\text{Fe}$ and${\mathrm{Fe}}_2{O}_3$are produced in the given process.

Concept Introduction:

• Balanced chemical equation of a reaction is written according to law of conservation of mass.
• Equation for Number of moles of a substance, from its given mass is,

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

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

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

• Mole ratio between the reactant and a product of a reaction are depends upon the coefficients of reactant and product in a balanced chemical equation.