Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.5 g/mL)
A)1.9 mm mineral oil
B)15 mm mineral oil
C)32 mm mineral oil
D)380 mm mineral oil
E)440 mm mineral oil

Question

Quizplus · Accepted Answer

The pressure in mm of mineral oil is calculated by multiplying the pressure in mm Hg by the ratio of the densities of mercury and mineral oil: 28.5 mm Hg * (13.5 g/mL / 0.88 g/mL) = 440 mm mineral oil.

Mineral Oil Can Be Used in Place of Mercury in Manometers