1.0 g of Mg is burnt with 0.28 g of O 2 in a closed vessel. Which reactant is left in excess and how much?

Question

1.0 g of Mg is burnt with 0.28 g of O 2 in a closed vessel. Which reactant is left in excess and how much?, Mg, 5.8 g, Mg, 0.58 g, O 2 , 0.24 g, O 2 , 2.4 g

MARKS App · Accepted Answer

Balanced reaction can be given as 2 M g 24 × 2 = 48 + O 2 32 → 2 M g O 32 g of O 2 is required to burn 48 g Mg So, 0.28 g O 2 will be required for 48 32 × 0.28 g Mg = 0.42 g of Mg Thus, Mg will remain in excess = 1 - 0.42 = 0.58 g

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