Chapter 3, Problem 3.139QP

Interpretation Introduction

Interpretation: for the given reaction, the simplest formula of the oxide is needed to be proving that ${\text{X}}_{\text{2}}{\text{O}}_{\text{3}}$ and the balanced equation for the given reaction is to be determined when the 2.4g of oxide is heated to form 1.68g of metal 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,

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

• Balanced chemical equation of a reaction is written according to law of conservation of mass.