1.
2H2O2(aq)2H2O(l)+O2(g)2H_2O_2(aq) \to 2H_2O(l) + O_2(g). Under conditions where 11 mole of gas occupies 24dm324\,\text{dm}^3, XLX\,\text{L} of 1/24M1/24\,\text{M} H2O2H_2O_2 solution produces 3dm33\,\text{dm}^3 of O2O_2. Thus XX is