One atmosphere of pressure is 760.0 mm of mercury. How many inches high is the column of mercury.

Answer 1

So, we basically are being asked to convert 760 mm to inches. To do this, we need to know the conversion factor for mm to cm and cm to inches, or just mm to inches. It's a common conversion that there are 10 mm in 1 cm and there are 2.54 cm in 1 inch. Thus, we have...

760.0 mm x 1 cm/10 mm x 1 inch/2.54 cm = 29.92 inches (to 4 significant figures)