Question

What length of mercury column will a gas at `0.650*atm` support?

Answer 1

`1*atm` of pressure will support a column of mercury `760*mm` high.

Explanation:

The use of mercury manometers, despite its risks, is still widespread in inorganic laboratories.

And thus `0.650*atmxx760*mm*atm^-1` `=` `??*mm*Hg`.