# A closed system consists of 0.5 lbmol of liquid water and occupies a volume of 0.145ft^3. Determine the weight of the system, in lbf, and the average density, in lb/ft^3, at a location where the acceleration of gravity is g=30.5ft/s^2

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A closed system consists of 0.5 lbmol of liquid water and occupies a volume of $$\displaystyle{0.145}{f}{t}^{{3}}$$. Determine the weight of the system, in lbf, and the average density, in $$\displaystyle{l}\frac{{b}}{{f}}{t}^{{3}}$$, at a location where the acceleration of gravity is $$\displaystyle{g}={30.5}{f}\frac{{t}}{{s}^{{2}}}$$

2021-02-16
Weight, $$\displaystyle{W}={m}{g}={0.5}{l}{b}{m}\times{30.5}{f}\frac{{t}}{{s}^{{2}}}\times{\left({l}{b}{f}\frac{{s}^{{2}}}{{32.174}}{l}{b}{m}{f}{t}\right)}$$
To find weight from the above
density $$\displaystyle\rho={\frac{{{m}}}{{{V}}}}={\frac{{{\frac{{{0.5}}}{{{32.174}}}}}}{{{0.145}}}}$$
then find density

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