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- 1. Multiple Choice
If the pressure exerted by a gas at 25 degrees C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?
R = 0.0821 for atms
.002766 mole
.0069 mol
2.766 mol
9.887 mol
- 2. Multiple ChoiceCalculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.7.18 L7.81 L4.63 L4.36 L
- 3. Multiple ChoiceWhat will happen to the volume of a gas under constant temperature if the pressure increases?IncreaseDecreaseNothingExplosion!
- 4. Multiple ChoiceHow are pressure and volume related?DirectlyIndirectlyThey aren't related
- 5. Multiple ChoiceIf a nitrogen gas occupies a volume of 500ml at a pressure of 0.971atm. What volume will the gas occupy at a pressure of 1.50 atm, assuming the temperature remains constant?323.6 ml728.25 ml772.39 mlNone of the above
- 6. Multiple Choice
Determine the Celsius temperature of 1.5 moles of gas contained in a 3.5-L vessel at a pressure of 1900 mmHg.
R = 62.3637 for mmHg
-201 degrees C
201 degrees C
71.0 degrees C
266 degrees C
- 7. Multiple ChoiceHow do you convert Celsius to Kelvin?Add 273Subtract 273You can't convert thoseThey are the same thing
- 8. Multiple ChoiceWhat about gasses can be measured?Pressure and VolumeTemperature, Volume, and PressureVolume and TemperaturePressure, Temperature, Volume, and Moles
- 9. Multiple ChoiceWhich of the following would increase the pressure on a system?Increase the TemperaturePump in more gasDecrease the volumeAll of these
- 10. Multiple ChoiceA balloon filled with helium gas has a volume of 500 mL at a pressure of 1 atm. The balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm. If the temperature has remained constant, what volume does the gas occupy at this height?250 mL1000 mL500 mL200mL
- 11. Multiple Choice
How many moles of gas are contained in 890.0 mL at 21.0 °C and 750.0 mm Hg pressure? R = 62.3637 for mmHg
.0364
.00474
.5096
.0684
- 12. Multiple ChoiceA balloon of helium gas occupies a volume of 1 L at 32°C. What volume will the gas occupy if we put it in a ice bath at a temperature of 0°C, assuming pressure remains constant? HINT: Temperature units MUST be in Kelvin!0 L1.11 L895 mL632 mL
- 13. Multiple Choice
Each of these flasks contains the same number of molecules. In which container is the pressure highest?Flask 1Flask 2Flask 3Flask 4 - 14. Multiple ChoiceEach of these flasks contains the same number of gas molecules. In which would the pressure be lowest?Flask 1Flask 2Flask 3Flask 4
- 15. Multiple ChoiceEach of these flasks is the same size and at the same temperature. Which one contains the most molecules?Flask 1Flask 2Flask 3Flask 4
- 16. Multiple ChoiceWhat is 0.00 degrees Kelvin known asNo such thingVery coldFreezing point of WaterAbsolute Zero
- 17. Multiple ChoiceA gas is heated from 263K to 298K. The volume is increased from 24.0L to 35.0L. If the original pressure was 1.00 atm, what is the new pressure?0.78 atm1.65 atm1.28 atm0.61 atm
- 18. Multiple ChoicePressure and temperature have a(n) _________ proportionality.directinverselinearexponential
- 19. Multiple Choice
A student measures the pressure and volume of an empty water bottle to be 1.4 atm and 2.3 L. She then decreases the pressure to 0.65 atm. What is the new volume?
2.1 L
5.0 L
8.2 L
3.9 L
- 20. Multiple Choice
A student inflates a balloon with helium then places it in the freezer. The student should expect
the balloon's volume to increase
the balloon's volume to decrease
the balloon's moles to increase
the balloon's moles to decrease
- 21. Multiple Choice
Determine the temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure.
R = 0.0821 for atms
0 K
107 K
207 K
307 K
- 22. Multiple Choice
Pressure is
defined as the mass that an object exerts when at rest.
not a measurable in gases.
defined as the number of moles of substance divided by the mass of the substance.
created by the force of the gas particles impacting the walls of the container.
- 23. Multiple ChoiceA nitrogen gas has a volume of 600mL at a pressure of 1atm. What volume will the gas occupy at a pressure of 3atm, assuming the temperature remains constant?125mL300mL200mL400mL
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