<p>A metal M forms a compound&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>M</mi><mi>a</mi></msub><msub><mi>O</mi><mi>b</mi></msub></math>. The molar mass of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>M</mi><mi>a</mi></msub><msub><mi>O</mi><mi>b</mi></msub></math>&nbsp;and atomic mass of metal (x) can be given by :</p>

<p>(E is eq. mass of metal)</p>