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23 Nov 2019

1. Two gases are contained in gas bulbs con-
nected by a valve. Gas A is present in a 36 L
bulb at a pressure of 364 torr. Gas B exerts
a pressure of 774 torr in a 83 L bulb. What
is the partial pressure of gas B after they
equilibrate once the valve has been opened?
Answer in units of torr.

2. A hypothetical rock was collected during
space exploration. Trapped inside was a no-
ble gas. A volume of 1.05 mL of the gas was
extracted from the rock at STP. The mass of
the gas sample was determined to be 0.188
mg. Identify the gas.

3. A sample of gas occupies 5 mL at STP. At
what pressure would this sample occupy 500
mL if the temperature is changed to 525?C?
Answer in units of torr.

4. The simplest formula for a compound is NO2.
If 46 grams of the gas occupies 11.2 liters at
standard conditions, what is the mass of one
mole of the compound?

5. If 250 mL of a gas at STP weighs 2 g, what is
the molar mass of the gas?

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Charless Law

a) A2.5 L sample of gas at 25oC is heated to50oC at constant pressure. What is the finalvolume?

b) Whattemperature would be required to increase the volume from 2.5 L to6.0 L?

Avogadros Law

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Combined Gas Laws

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Ideal Gas Law

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Application of Gas Laws:

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