Mixtures of Gases_Chemistry

What mole fraction of O2 should be used in a scuba tank to ensure that the partial pressure of O2 is 0.21 atm under conditions in which the diver experiences an underwater pressure of 8.4 atm?

0.025

What mole fraction of O2 should be used in a scuba tank to ensure that the partial pressure of O2 is 0.21 atm under conditions in which the diver experiences an underwater pressure of 6.8 atm?

0.031

What is the mole fraction of the blue gas in the mixture shown?

0.100

What is the mole fraction of N2 in a mixture of N2, O2, and He in which the partial pressure of N2 is 0.70 atm, the partial pressure of O2 is 0.50 atm, and the partial pressure of He is 1.6 atm?

0.25

What is the partial pressure of H2 in a mixture containing 1.3 g H2, 5.7 g He, and 18.2 g O2 if the pressure of the gas mixture is 1.05 atm?

0.26 atm

What is the mole fraction of the red gas in the mixture shown?

0.333

What is the partial pressure of the green gas in the mixture shown if the total pressure of the mixed gases is 2.44 atm?

1.22 atm

What is the partial pressure of the blue gas in the mixture shown if the total pressure of the mixed gases is 230 mm Hg?

96 mm Hg

If a 1.0 L mixture of gases contains 1.0 mol of Br2, 2.0 mol of He, 2.5 mol of O2, and 1.5 mol of H2, which gas has the highest partial pressure?

O₂

If you combine 2.0 mol of O2 with 1.0 mol H2 in a 1.0 L vessel, how will their partial pressures compare?

PO₂ will be twice as large as PH₂

Which of these is the correct relationship to use to find the partial pressure of a gas in a mixture?

P₁=X₁Ptotal

Which of these is a correct statement about a mixture of gases?

a gas present in very low concentration in a mixture, the greater its partial pressure.

What does Dalton's law of partial pressures state?

the total pressure of a gas mixture is equal to the sum of the partial pressure of the individual components