Be sure to answer all parts.

A solution contains $0\mathrm{.}480$mol of isopropanol $(C_3{H}_{7}OH)$ dissolved in $2\mathrm{.}820$mol of water.

$($a$)$ What is the mole fraction of isopropanol?

$($b$)$ What is the mass percent of isopropanol?

$\%$

$($c$)$ What is the molality of isopropanol?

m