Dalton and Grahms law

Question

6. Helium has a pressure of 160 mmHg, Carbon Monoxide has a pressure of

       240 mmHg, Hydrogen has a pressure of 80 mmHg, and Methane has a

       pressure of 320 mmHg. What is the total pressure of a container in which \

       these gases have been placed.

Answer 1

Dalton's law (Graham's law does not apply to this problem) simply states that you can combine all the partial pressures of the gases in a system to get the total pressure. So here it is as follows:

160 + 240 + 80 + 320 = 800 mmHg.