A combustor generates $719$lbmole$\frac{s}{h}r$ of gases at $1,800F$ and $1$atm. The actual flow rate

$(f\frac{t^3}{m}in)$ at which exhaust gas leaves the combustor is most nearly:

$($A$)4\mathrm{.}3{10}^3$

$($B$)2\mathrm{.}0{10}^4$

$($C$)2\mathrm{.}6{10}^5$

$($D$)1\mathrm{.}2{10}^6$