1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and how much? (At. wt. Mg = 24,O = 16 )

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Detailed Solution

nMg=124=0.0416molesnO2=0.5632=0.0175 moles the balanced equation is ∴ Mass of Mg left in excess =0.0066×24=0.16 g

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