Chapter 3, Problem 3.6P

Interpretation Introduction

Interpretation:

A road map and a plan for the calculations of the number of ${\text{P}}_4$ molecules that can be produced from $2.5\text{ g}$ of ${\text{Ca}}_3{\left({\text{PO}}_4\right)}_2$ has to be determined.

Concept introduction:

One mole is defined as the amount of substance that contains the same number of entities such as molecules, ions, atoms as the number of atoms in $12\text{ g}$ of $\text{C-12}$. This number is called Avogadro’s number. The value of Avogadro’s number is $\text{6}\text{.022}\times {\text{10}}^{23}\left(\text{entitites/mol}\right)$.

The mass of one mol of a chemical substance in grams is called molar mass. Molar mass and Avogadro’s number are used as the conversion factor in the calculation of amount or mass of a chemical substance.