a. H2CO3 + Ca → H2 + CaCO3
b. 2 Fe + 3 H2 → 2 FeH3
c. 2 Hg + O2 → 2 HgO (oxido mercúrico)
4 Hg + O2 → 2 Hg2O (oxido mercurioso)
d. H3PO4 + RbOH = RbH2PO4 + H2O
e. P2O5 + 3 H2O → 2 H3PO4
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a. H2CO3 + Ca → H2 + CaCO3
b. 2 Fe + 3 H2 → 2 FeH3
c. 2 Hg + O2 → 2 HgO (oxido mercúrico)
4 Hg + O2 → 2 Hg2O (oxido mercurioso)
d. H3PO4 + RbOH = RbH2PO4 + H2O
e. P2O5 + 3 H2O → 2 H3PO4