Chapter F, Problem E.3AST

Interpretation Introduction

Interpretation:

Molar mass of magnesium has to be calculated.

Concept Introduction:

Molar mass is the mass per mole of the atoms.  This can also be said as the mass of individual atom that is multiplied by the Avogadro’s number.  This can be represented in equation form as shown below;

    $M=m_{atom}{N}_A$

If the element is a mixture of isotope, then the molar mass of the element is the average atom mass of the element.  This is represented by the equation shown below;

    $M=m_{atom,average}{N}_A$

Where,

    $m_{atom,average}={\displaystyle \sum _{isotopes}{f}_{isotope}{m}_{isotope}}$