Question

1) An idela gas in a sealed container has a initial volume of 2.45 L. At constant pressure, it is cooled to 19.00°C where its final volume is 1.75 L. Wht was the initial temperature?

- ______°C

2) A sealed container holding 0.0255 L of an idela gas at 0.989 atm and 67°C is placed into a refrigerator and colled to 39°C with no change in volume. Calculate the final pressure of the gas.

- _________atm

3) A sample of an ideal gas has a volume of 3.10 L at 10.20°C and 1.80 atm. What is the volume of the gas at 24.80°C and 0.997 atm?

- ________L

4) If 52.5 mol of an idela gas occupies 63.5 L at 83.00°C, what is the pressure of the gas?

- _____ atm

5) If 2.73 moles of an ideal gas has a pressure of 3.83 atm, and a volume of 26.73 L, what is the temperature of the sample in degrees Celsius?

- ________°C

6) An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume is 4.00L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?

- ______ molecules

7) A gaseous mixture contains 448.0 Torr of H2(g), 374.5 Torr of N2(g), and 89.7 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.

- XH2= ________

-XN2=__________

-XAr=____________