An experiment at Sandia National Labs in New Mexico is performed at an atmospheric pressure of

788.7 millimeters of mercury (mm Hg). What is this pressure in atmospheres (atm) ?

1.0 atm

Explanation:

Millimetre mercury:

It is the monometric unit of pressure. It is define as "The pressure exerted by the column pf mercury at the height of 1 millimetre.

It is represented as mmHg.

It can also be written as mm Hg.

Atmosphere (atm):

It is barometric pressure, define as "The force exerted by atmospheric column on per unit area".

It is written as "atm".

Conversion of mmHg to atm:

788.7 mmHg * 1 atm / 760 mmHg

1.0 atm