What is the quantity of heat evolved at constant pressure when 30.5 g H2O(l) is formed from the combustion of H2(g) and O2(g)

If it is an isoelectronic series select true, if not select false. o2-, s2-, se2-, te2- na+, k+, rb+, cs+ n3-, p3-, as3-, sb3- ag, cd+, sn3+, sb4+ f-, cl-, br-, i- f-, ne, na+, mg2+ s2-, s, s6+