A gas mixture is flowing at $m^{}=100k\frac{g}{s}$ contains $65$mol$\%n-$pentane and $35$mol$\%n-$hexane

a$.$ Calculate molecular weights of each species.

b$.$ Calculate the average molecular weight $(\frac{?}{\text{b}\text{a}\text{r}}(M{)}_w)$ of the stream.

c$.$ Calculate the molar flow rate of each species $(n_l^{})$ and of the total stream $(n^{})$ in gmol$/$s$.$

d$.$ Calculate the mass flow rate and the mass fraction of each species $m_l^{}?$ Confirm that the sum of the mass flow rate of each species is $100k\frac{g}{s}.$

Hint: You can use average molecular weight to calculate total molar flow rate from the total mass flow rate.