2a)Suppose 0.510 g of a gas occupies a volume of 0.175 L at a temperature of 25.0 oC is held at a pressure of 1.000 atm. What is the molar mass of the gas? Express your answer in g/mol.

2b)A 1.00 L sample of dry air contains 0.0319 mol N2, 0.00856 mol O2, and 0.000381 mol Ar. If temperature is 25.0 oC what is the partial pressure of N2? Express your answer in atmospheres.

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At this point Ron is slightly confused, this isnât surprising. However, Hermione is doing rather well with them. This also isnât surprising since she studies every day, as should all students. She feels she can help him understand these problems by working with him though another: A 1.00 L sample of dry air contains 0.0319 mol N2, 0.00856 mol O2, and 0.000381 mol Ar. If temperature is 25.0â¦C what is the partial pressure of N2? Express your answer in atmospheres.

A sample of air is collected over water at 50.00Â°C. At equilibrium, the total pressure of the moist air is 1.0100 atm. The equilibrium vapor pressure of water at 50.00 Â°C is 92.5876 mmHg. The composition of dry air is 80.00 mol% N2, 19.00 mol% O2, and 1.000 mol% Ar. a) Calculate the partial pressures in atm of N2, O2, and Ar in the wet mixture assuming ideal gas behavior. b) Calculate the mole fractions of H2O, N2, O2, and Ar in the wet mixture, again assuming ideal gas behavior. c) Calculate the mass fractions of H2O, N2, O2, and Ar in the wet mixture, again assuming ideal gas behavior. d) Calculate the average molecular weight of the wet and dry air in units of g/mol.

1. A mix of N₂, O₂, CO₂ and argon gas is contained in a 40.0 L container. The total pressure is 1.80 atm. T = 25.0 degrees C. The partial pressure of O₂

is 0.600 atm. How many grams of O₂ are present? Assume ideal behavior.

2. A balloon containing N₂ gas has volume 4.80 L at a temperature 32.0 ^oC. The temperature is changed to -28.0 ^oC while still at a constant pressure of 762 torr. What will be the balloonâs new volume?

3. What is the mole fraction of Argon in a mixture of Ar, Ne and N₂ in a 2.70 L flask, when the partial pressures of the gases are: 0.215 atm Ar ; 0.582 atm Ne and 0.203 atm N₂? Temperature is 25 degrees C.

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