A mixture of gases has a total pressure of 48 atmospheres. If there are a total of 4 gases of varying molecular weights in the mixture and the smallest and largest gases account for 75% of the total pressure, which of the following is the pressure of the remaining gases?

Loading ...

Correct Answer: **B.** *12 atmospheres*

This is a Dalton’s partial pressure question. According to Dalton’s Partial pressure law, the total pressure of a mixture of gases can be determined by adding the individual pressures of the gas. In this problem, the total pressure is 48 atmospheres (atms) and 75% or 3/4ths of the pressure is accounted for by the largest and smallest gases. The two remaining gases must there for account for only 25% of the total pressure. Therefore, 25% of 48 is equal to 12.

Get it right? Tweet at us!

**Subscribe below** to get the DAT Question of the Day delivered straight to your inbox every morning.