The weight percentage of hydrogen in Q, formed in the following reaction sequence, is ________.
[Given: Atomic mass of \( \mathrm{H} = 1 \), \( \mathrm{C} = 12 \), \( \mathrm{N} = 14 \), \( \mathrm{O} = 16 \), \( \mathrm{S} = 32 \), \( \mathrm{Cl} = 35 \)]
