Chapter 8, Problem 8.21QP

Interpretation Introduction

Interpretation:

The empirical formula of the precursor compound for ‘perc’ should be identified when the combustion of $\text{2}\text{.90g}$ precursor compound produces $\text{2}\text{.58g}$ of ${\text{CO}}_{\text{2}}$ and $\text{1}\text{.06g}$ of ${\text{H}}_{\text{2}}\text{O}$.

Concept introduction:

• Combustion is the process of burning of a compound; in which the compound reacts with excess of oxygen.
• Combustion of hydrocarbon produces ${\text{CO}}_{\text{2}}$ and ${\text{H}}_{\text{2}}\text{O}$.
• Empirical formula of a compound represents the smallest whole number relative ratio of elements in that compound.
• Number of moles of a substance, from its given mass is,

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

To determine: the number of moles of ${\text{CO}}_{\text{2}}$ and ${\text{H}}_{\text{2}}\text{O}$ produced.