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Q. $1.2 \,g$ of $Mg$ (At. mass 24) will produce $MgO$ equal to

Some Basic Concepts of Chemistry

Solution:

$24\,g$ of Mg produce $MgO=1$ mol
$1.2\,g$ of Mg produce MgO $=\frac{1\times1.2}{24}$
$=0.05$ mol