Плиз !!!!!!!!!!!!!!!!!!!!!!!!!!

Question

Плиз !!!!!!!!!!!!!!!!!!!!!!!!!!

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Answer 1

1) 6Na+2H3PO4 = 2Na3PO4+3H2
2) Na2O+H2SO4 = Na2SO4+H2O
3) Cu(OH)2 = CuO+H2O
4) SO3+Na2O = Na2SO4