Balance the following chemical equations :
`Mg+CO_(2)overset(Delta)toMgO+C`

Balance the following chemical equation: Pb(NO_(3))_(2(s))overset("Heat")(to)PbO_((s))+NO_(2(g))+O_(2(g))

Balance the following chemical equation Na+H_2OtoNaOH+H_2

Complete and balance the following chemical equations: (a). NaCl(aq)+H_(2)O(l)overset("Electricity")to (b) NaHCO_(3)overset(Heat)to (c). NaCl+NH_(3)+H_(2)O+CO_(2)to (d) Ca(OH)_(2)+Cl_(2)to .

In a following chemical reaction: CaO + C overset(Delta) to x + CO x is: