specific gravity of mercury

Problem
A gage on the suction side of a pump shown vacuum of 254 mm of mercury. Compute (a) pressure head in meters of water; (b) pressure in kiloPascal; (c) absolute pressure in kiloPascal if barometer reads 736.6 mm of mercury.
 

Problem
If the pressure in the tank of oil (sp gr 0.80) is 415 kPa, what is the equivalent head: (a) in meters of oil, (b) in meters of water, and (c) in centimeters of mercury?
 

Problem
What height of mercury column will cause a pressure of 680 kPa? What is the equivalent height of water column?
 

Problem
Determine the pressure in a vessel of mercury, specific gravity 13.6, at a point 20 cm below the surface. Express the answer in N/m².