Question

How many grams of magnesium oxide are obtained during the combustion of 2 g of magnesium in fasting according to the reaction 2Mg (s) + O₂ (g) -> 2MgO (s). Ar(Mg) = 24.3; Ar(O) = 16.

Answer 1

Moles of magnesium $=\frac{2}{24.305}=0.08moles$

Ratio= 1:1

Mass of magnesium oxide $=40.3044×0.08=3.22grams$