Chapter 8.2, Problem 8.2.1SR

Interpretation Introduction

Interpretation:

The masses of ${\text{CO}}_2$ and ${\text{H}}_2\text{O}$ molecules formed from combustion reaction of given compound ${\text{C}}_7{\text{H}}_{12}$ should be identified.

Concept introduction:

• Combustion of hydrocarbon produces ${\text{CO}}_{\text{2}}$ and ${\text{H}}_{\text{2}}\text{O}$.
• Combustion is the process of burning a compound in presence of excess of oxygen.
• Balanced chemical equation of a reaction is written according to law of conservation of mass.
• Mole ratios between the reactants and products of a reaction are depends upon the coefficients of respective reactant in a balanced chemical equation.
• Equation for number of mole of a compound from its given mass,

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

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

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