Answer
a) $2Sb^{(0)} + 3{Cl_{2}}^{(0)} \rightarrow 2Sb^{(+3)}Cl_{3}^{(-1)}$
b) $Sb^{(+3)}Cl_{3}^{(-1)} + {Cl_{2}}^{(0)} \rightarrow Sb^{(+5)}Cl_{5}^{(-1)}$
c) $2C^{(0)}+O_{2}^{(0)} \rightarrow 2C^{(+2)}O^{(-2)}$
Work Step by Step
a) $2Sb^{(0)} + 3{Cl_{2}}^{(0)} \rightarrow 2Sb^{(+3)}Cl_{3}^{(-1)}$
b) $Sb^{(+3)}Cl_{3}^{(-1)} + {Cl_{2}}^{(0)} \rightarrow Sb^{(+5)}Cl_{5}^{(-1)}$
c) $2C^{(0)}+O_{2}^{(0)} \rightarrow 2C^{(+2)}O^{(-2)}$