1. A gas occupies a volume of 31.0 L at 18.0"C. If the gas temperature rises to 36.0°C at constant pressure, (a) would you expect the volume to double to 62.0L? Explain. Calculate the new volume (b) at 36.O°C, (c) at 400. K, and (d) at 0°C. 2. A 256 ml sample of a gas exerts a pressure of 2.75 atm at 16.0°C. What volume would it OCcupy at 1.00 atm and 100."C? 3. Calculate the molecular weight (mass) of a gaseous element if 0.480 g of the gas OCcupies 367 mL at 365 torr and 45°C. Suggest the identity of the element.

Chemistry: The Molecular Science
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Chapter8: Properties Of Gases
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1. A gas occupies a volume of 31.0 L at 18.0°C. If the gas temperature rises to 36.0 C at
constant pressure, (a) would you expect the volume to double to 62.0 L? Explain. Calculate
the new volume (b) at 36.0°C, (c) at 400. K, and (d) at 0"C.
2. A 256 ml sample of a gas exerts a pressure of 2.75 atm at 16.0°C. What volume would it
OCcupy at 1.00 atm and 100.C?|
3. Calculate the molecular weight (mass) of a gaseous element if 0.480 g of the gas
Occupies 367 ml at 365 torr and 45°C. Suggest the identity of the element.
4. Analysis of a volatile liquid shows that it contains 37.23% carbon, 7.81% hydrogen, and
54.96% chlorine by mass. At 150.°C and 1.00 atm, 500. mL of the vapor has a mass of
0.922 g. (a) What is the molecular weight (mass) of the compound? (b) What is its
molecular formula?
5. A 4.00-L flask containing He at 6.00 atm is connected to a 2.00-L flask containing Na at 3.00
atm and the gases are allowed to mix. (a) Find the partial pressures of each gas after they
are allowed to mix. (b) Find the total pressure of the mixture. (c) What is the mole fraction
of helium?
Transcribed Image Text:1. A gas occupies a volume of 31.0 L at 18.0°C. If the gas temperature rises to 36.0 C at constant pressure, (a) would you expect the volume to double to 62.0 L? Explain. Calculate the new volume (b) at 36.0°C, (c) at 400. K, and (d) at 0"C. 2. A 256 ml sample of a gas exerts a pressure of 2.75 atm at 16.0°C. What volume would it OCcupy at 1.00 atm and 100.C?| 3. Calculate the molecular weight (mass) of a gaseous element if 0.480 g of the gas Occupies 367 ml at 365 torr and 45°C. Suggest the identity of the element. 4. Analysis of a volatile liquid shows that it contains 37.23% carbon, 7.81% hydrogen, and 54.96% chlorine by mass. At 150.°C and 1.00 atm, 500. mL of the vapor has a mass of 0.922 g. (a) What is the molecular weight (mass) of the compound? (b) What is its molecular formula? 5. A 4.00-L flask containing He at 6.00 atm is connected to a 2.00-L flask containing Na at 3.00 atm and the gases are allowed to mix. (a) Find the partial pressures of each gas after they are allowed to mix. (b) Find the total pressure of the mixture. (c) What is the mole fraction of helium?
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