Question

How do you convert the pressure 0.75 atm to mm Hg?

Answer 1

`"1 atmosphere"` `-=` `760*mm*Hg`

Explanation:

Of course, the length of a column of mercury is not a measurement of pressure, but if you were to go thru the math using the density of mercury, you would get a pressure of 1 atm for a column of mercury 760 mm high:

`0.75*cancel(atm)xx760*mm*Hg*cancel(atm^-1)` `=` `??" atmospheres"`

Chemists often use a mercury column to measure pressure (or at least measure vacuum) as it is a visual measurement of pressure.