Complete and balance the chemical equations.Then classify the equation as electron-transfer or exchange type?

Complete and balance the chemical equations, then classify the reaction that each equation represents as electron-transfer or exchange type reaction





a.) Mg(s) + O_2_(g) ---%26gt; _____(s)





b.) Na_2_CO_3_(s) +___(aq)--%26gt; NaCl(aq) + H_2_O(L) + ___(g)





c.) ____(aq) + _____(aq) ---%26gt; ZnS(s) + NaCl(aq)|||2 Mg + O2 = 2 MgO ( electron- transfer)





Na2CO3 + 2 HCl = 2 NaCl + H2O + CO2





ZnCl2 + Na2S = ZnS + 2 NaCl