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P2O5->H3PO4->Ca3(PO4)2...
Answer
Ca3(PO4)+HNO3-> Mg(NO3)2->t...
Answer
Ca3(PO4)2+HNO3 -> Mg(NO3)2->t Ca+P->...
Answer
Al2O3+H2O= Al2O3+H2SO4= Al2O3+NaOH= Al2O3+CuSO4=...
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