Determine the mass of magnesium oxide formed during combustion of 48 grams of magnesium.

The magnesium combustion reaction is described by the following chemical equation:
Mg + ½ O2 = MgO;
When 1 mol of magnesium is burned, 1 mol of its oxide is synthesized.
Let’s calculate the amount of magnesium available.
M Mg = 24 grams / mol;
N Mg = 48/24 = 2 mol;
The same amount of magnesium oxide will be synthesized.
Let’s calculate its weight.
M MgO = 24 + 16 = 40 grams / mol;
m MgO = 40 x 2 = 80 grams;

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