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 )

1. A. Mg, 0.16 g
2. B. O2 , 0.16 g
3. C. Mg, 0.44 g
4. D. O2 , 0.28 g

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