What is the total pressure, in millimeters of mercury, of a gas mixture containing argon gas at 0.33 atm , helium gas at 330 mmHg , and nitrogen gas at 310 torr ?

The total pressure is 890.8 mm Hg

Explanation:

Let's assume all three gases and their mixture behaves ideally.

Hence, according to Dalton's law-

Total pressure = (pressure of Ar) + (pressure of He) + (pressure of nitrogen)

                       = 0.33 atm + 330 mm Hg + 310 torr

                        = 890.8 mm Hg

So, the total pressure is 890.8 mm Hg