A stream of air $(21\mathrm{.}0$ mole $\%O_2,$ the rest $N_2)$ flowing at a rate of $15\mathrm{.}0k\frac{g}{h}$ is mixed with a stream of $C{O}_2.$

The $C{O}_2$ enters the mixer at a rate of $20\mathrm{.}0\frac{m^3}{h}$ at $200\mathrm{.}0C$ and $3\mathrm{.}50$ bar. What is the mole $\%$ of $C{O}_2$ in the product stream?

$$ mole $\%C{O}_2$