Сделайте срочно прошу ваааас!!!
Осуществите цепочки превращений: 
1) H2S - SO2 - Na2SO3 - Na2SO4
2) H2SO4 - SO2 - S - Al2S3 - Al2(SO4)3
3) P - P2O5 - Na3PO4 - Ag3PO4 - H3PO4

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