48.98 % oxygen
Explanation:
Aluminum sulfite have the following chemical formula Al₂(SO₃)₃.
To determine the percent of oxygen in aluminium sulfite we follow the next algorithm.
molecular weight of Al₂(SO₃)₃ = 294 g/mole
if in 294 g of Al₂(SO₃)₃ there are 144 g of oxygen
then in 100 g of Al₂(SO₃)₃ there are X g of oxygen
X = (100 × 144) / 294 = 48.98 % oxygen
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percentage composition of an element
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