The system in Figure P1.6 is at $20^{\circ} \mathrm{C}$. If atmospheric pressure is $101.3 \mathrm{kPa}$ and the absolute pressure at the bottom of the tank is $264.1 \mathrm{kPa}$, what is the specific gravity of the oil? The specific gravity of the solvent is 1.4 and that of mercury is 13.6.

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FIGURE P1.6 P atm Oil 1.5 m Water 2.25 m Solvent 3.0 m Mercury 0.4 m