The organic compound di-n-butyl phthalate, c16h22o4(l), is sometimes used as a low-density (1.046 g·ml–1) manometer fluid. compute the pressure (in torr) of a gas that supports a 535-mm column of di-n-butyl phthalate. the density of mercury is 13.53 g·ml–1.

P=(mRT/MV) then P=dRT/M

so at STP:

T= 25 celsius which equals 298.73 Kelvin

d= 1.046 g/mL = 0.001046 g/L

R =0.08206 Latm/Kmol

M= molar mass of C16H22O4, which is (12)16+(1)22+(16)4 = 278 g/mol

P=dRT/M

1 atm = 760 torr = 760 mm Hg

multiply P by 760

Explanation:

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