A tank contains helium gas at 490 mmHg, nitrogen 0.75 atm, and neon at 520 torr. What is the total pressure in atm?

1 Answer
Dec 9, 2016

Well, we turn the measurements of pressure into atmospheres, and get...........

Explanation:

PHe+PN2+PNe=

490mmHg760mmHgatm1+0.75atm+520mmHg760mmHgatm12atm.

You know that 1atm760mmHg. Or rather that one atmosphere will support a column of mercury 760mm high. You must simply know this. This measurement of pressure should not really be used above 1atm.