mixture in $($a$)$ w$/$w$,($b$)w(kg)N(m^3),$ and $($c$)$ mole fraction at a temperature of $25C.$

$15.$ An amount of $5kg$ of sucrose $($ MW $=342\frac{g}{m}ol)$ is dissolved in $20,000g$ of water. The density of the resulting solution is $1070k\frac{g}{m^3}.$ Estimate the sucrose concentration in the solution in $($a$)\frac{w}{w},($b$)w(kg)V(L),($c$)$ mole fraction, and $($d$)$ molar concentration.

$16.$ Estimate the pressure $100m$ below the surface of a lake. State all assumptions in vour estimation.