Chapter 8, Problem 8.91QP

Interpretation Introduction

Interpretation: the mass of ${\text{H}}_2\text{O}$ produced in the given reaction to be determined when oxygen in $\text{30g}$ of air is reacted with ${\text{C}}_{\text{4}}{\text{H}}_{\text{10}}$.

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.