1. 4P+5O2=2P2O5
2. P2O5+3H2O=2H3PO4
3. 2Al+2H3PO4=2AlPO4+3H2
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Answers & Comments
1. 4P+5O2=2P2O5
2. P2O5+3H2O=2H3PO4
3. 2Al+2H3PO4=2AlPO4+3H2