Answer
a) $2H_{2}^{(+1)}O_{2}^{(-1)} \rightarrow 2H_{2}^{(+1)}O^{(-2)} + O_{2}^{(0)}$
b) $N^{(-3)}H_{4}^{(+1)}N^{(+5)}O_{3}^{(-2)} \rightarrow N_{2}^{(+1)}O^{(-2)}+2H_{2}^{(+1)}O^{(-2)}$
Work Step by Step
a) $2H_{2}^{(+1)}O_{2}^{(-1)} \rightarrow 2H_{2}^{(+1)}O^{(-2)} + O_{2}^{(0)}$
b) $N^{(-3)}H_{4}^{(+1)}N^{(+5)}O_{3}^{(-2)} \rightarrow N_{2}^{(+1)}O^{(-2)}+2H_{2}^{(+1)}O^{(-2)}$