Question

A molecule of Al2(SO4)3 contains: 12 O atoms 4 O atoms 6 Al atoms 12 S atoms

Answer 1

12 O atoms 
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Answer 2

Answer is: A molecule of Al2(SO4)3 contains 12 O.

Al₂(SO₄)₃ is salt aluminium sulfate.

Aluminium sulfate contains:

1) two aluminium atoms (Al).

2) three sulfur atoms (S).

3) twelve oxygen atoms (O). There are three sulfate anions (SO₄²⁻) and every anion contains four oxygen and one sulfur atom.

Aluminium has oxidation number +3 and sulfate has charge -2.