The total pressure in a mixture of gases is equal to the partial pressure(s)of
A)all the gases added together.
B)the gas with the highest molecular weight.
C)the gas with the smallest number of moles.
D)the gas with the greatest number of moles.
E)the gas that occupies the largest volume.

Question

Quizplus · Accepted Answer

The total pressure in a mixture of gases is equal to the sum of the partial pressures of all the gases present in the mixture. This is known as Dalton's law of partial pressures. Therefore, choice A is correct. Choices B, C, D, and E are not correct because the total pressure is not determined by the molecular weight, number of moles, or volume of any one gas in the mixture.

The Total Pressure in a Mixture of Gases Is Equal