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4.2 Balance the following equations:

a. [tex]Cl_2O_7 + H_2O \rightarrow HClO_4[/tex]

b. [tex]Fe_2(CO_3)_3 \rightarrow Fe_2O_3 + CO_2[/tex]

c. [tex]H_3PO_4 + Mn(OH)_2 \rightarrow Mn_3(PO_4)_2 + H_2O[/tex]

d. [tex]P_2H_4 \rightarrow PH_3 + P_4[/tex]

e. [tex]SO_2Cl_2 + HI \rightarrow H_2S + H_2O + HCl + I_2[/tex]