Question

Given below is a reaction
2Mg+O2 = 2MgO
Mass of magnesium oxide formed by buring 24g of magnesium in air is
a.16g
b.80g
c.20g
d.40g
O = 16 g/mol
Mg = 24 g/mol
so
mass MgO/mass Mg = (24+16)/24

mass MgO = 24 (24+16)/24 = 40 grams
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12.210g of carbon how many atom do you have in 1mole of a substance = 6.02*10 1mole of a carbon = 12g
12.210g of carbon how many atom do you have in 1mole of a substance = 6.02*10 1mole of a carbon = 12g 12g = 6.02*10

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