2molSO3和3molSO2其分子数之比为_________；相同状况下(均为气体)体积之比为___________；氧原子数之比为______________。0.2 mol Al2(SO4)3中含有Al3+___________ mol、SO42-__________ mol.
2molSO3和3molSO2其分子数之比为_________；相同状况下(均为气体)体积之比为___________；氧原子数之比为______________。0.2 mol Al2(SO4)3中含有Al3+___________ mol、SO42-__________ mol.
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