1 gm of Mg is burnt in a closed vessel with 1gm of oxygen.The mass of unreacted reactant is
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Answer:
Balanced reaction is:
2Mg+O
2
→2MgO
According to the reaction 2 mol (or 2×24.3=48.6g) Mg reacts with 32 g oxygen. 1 g of Mg requires =
48.6
32
=0.66g oxygen but given oxygen is 0.5 g ∴ oxygen is the limiting reagent
0.5 g oxygen can burn ==
32
48.6
×0.5=0.75g Mg
Excess of Mg left =1−0.75=0.25g
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