####8. $1.0 g$ of magnesium is burnt with $0.56 g O_2$ in a closed vessel. Which reactant is left in excess and how much?
(At. wt. $Mg=24 ; O=16$ )
[2014]
(a) $Mg, 0.16 g$
(b) $O_2, 0.16 g$
(c) $Mg, 0.44 g$
(d) $O_2, 0.28 g$
$\therefore \quad$ Molar Ratio $=\frac{1}{2} \times \frac{32}{4}=4: 1$
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