vThe total pressure in a container is the sum of the pressure each gas would exert if it were alone in the container.

vThe total pressure is the sum of the partial pressures.

vPTotal = P1 + P2 + P3 + P4 + P5 ...

vFor each P = nRT/V
DaltonŐs Law
John Dalton
Chemist & Physicist
Eaglesfield, Cumberland, England
September 6, 1766 – July 27, 1844