The atmosphere in a sealed diving bell contained oxygen and helium. If the gas mixture has 0.240 atm of oxygen and a total pressure of 2.65 atm, calculate the mass of helium in 13.0 L of the gas mixture at 28°C.

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line