Mixtures, Partial Pressures & Mole Fractions

What is the total pressure of a gas mixture with partial pressures of 0.78 atm, 0.33 atm, and 1.59 atm?

In a mixture of He and Ne, the total pressure is 335 torr and the partial pressure of He is 0.228 atm. What is the partial pressure of Ne?

A 3.55 L container holds 56.7 g of Ar and 33.9 g of He at 33°C. Fill in each pressure (in atm):
P(Ar) = 1($) atm   P(He) = 2($) atm   Total = 3($) atm

A sample of O₂ is collected over water in a 5.00 L container at 20°C. If the total pressure is 688 torr, how many moles of O₂ are collected?

True or False: When a gas is collected over water, the vapor pressure of water must be subtracted from the total pressure to find the pressure of the collected gas.

Determine the mole fraction of He (χHe) when 44.5 g of He is mixed with 8.83 g of H₂.

In a container, 4.56 atm of F₂ is combined with 2.66 atm of Cl₂. What is the mole fraction of F₂ (χF₂)?