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Completeaza ecuatile reactilor : H2SO4+Zn-->H2+...
H2SO4+Ca3(PO4)2----->H3PO4...
H2SO4+NaSiO3-->..


Răspuns :

H2sO4+Zn = H2+ZnSO4
H2SO4+Ca(PO4)2 = H3PO4+Ca3PO4
H2SO4+NaSiO3 = H2SiO3+ NaSO4