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- 1. Multiple Choice
In order to convert to Kelvin, you add ______ to the Celsius measurement.372273237732 - 2. Multiple ChoiceWhat is 50 C in Kelvin?22332310050
- 3. Multiple ChoiceWhat is 50 C in Kelvin?22332310050
- 4. Multiple ChoiceIf a balloon is cooled what will happen to the volume?Volume will increaseVolume will decreaseVolume will not change
- 5. Multiple ChoiceWhich of the following would increase the (gas) pressure of a system?Increase the TemperaturePump in more gasDecrease the volumeAll of these
- 6. Multiple Choice
Boyle's law : The pressure and volume of a gas show a _____ relationship.
Inverse
Direct
- 7. Multiple ChoiceIn the ideal gas law, which variable represents the gas constant?nRTV
- 8. Multiple ChoiceYou have a gas that has a pressure of 2 ATM and a volume of 10L. What would be the new volume if the pressure was changed to 1 ATM?5 L20 LIt would stay at 10L1 L
- 9. Multiple ChoiceA sample of gas with a volume of 30.0 mL at 25.0oC is heated to 50.0oC. What is the new volume of the gas?60.0 mL15.0 mL27.5 mL32.5 mL
- 10. Multiple ChoiceA sample of oxygen gas has a volume of 150.0 mL when its pressure is .947 atm. What will the volume of the gas be if it is lowered to a pressure of 0.658 atm and the temperature remains constant?72 mL144 mL216 mL288 mL
- 11. Multiple ChoiceWhich container will have lower pressure?leftrightthey both have the same pressure
- 12. Multiple Choice
If the pressure exerted by a gas at a temperature of 298 K in a volume of 0.044 L is 3.81 atm, how many moles of gas are present? pV=nRT and R = 0.0821 L*atm/mol*K
.002766 mole
.0069 mol
2.766 mol
9.887 mol
- 13. Multiple Choice
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm. pV=nRT and R = 0.0821 L*atm/mol*K
7.18 L
7.81 L
4.63 L
4.36 L
- 14. Multiple ChoiceWhich law helps us find the moles of gas in a sample?Charles LawBoyle's LawCombined Gas LawIdeal Gas Law
- 15. Multiple ChoiceA 7.50 liter sealed jar at 18 °C contains 0.125 moles of oxygen and 0.125 moles of nitrogen gas. What is the pressure in the container?7.38 atm0.796 atm0.684 atm0.398 atm
- 16. Multiple ChoiceA 15.50 gram sample of a gas exerts a pressure of 1.40 atmospheres when held in an 8.00 liter at 22 °C. What is the molar mass (grams/mol) of the gas?33.5 g/mol0.0298 g/mol6.57 g/mol62.2 g/mol
- 17. Multiple ChoiceAt what temperature (in Kelvin) would 4.0 moles of hydrogen gas in a 100 liter container exert a pressure of 1.00 atmospheres?0.0305 K0.487 K32.8 K304.5 K
- 18. Multiple ChoiceA 500 mL metal cylinder holding 0.100 moles of helium gas is known to rupture at a pressure of 10 atmospheres. At what temperature, in °C, will the container fail?336 °C608 740 °C- 272.4°C609 °C
- 19. Multiple ChoiceIf I have 1.9 moles of gas held at a pressure of 5 atm and in a 5 L container, what is the temperature of the gas?160.46 K16046 K273 K145.5 K
- 20. Multiple ChoiceAt STP, what is pressure in atmospheres?1 atm10 atm0 atm100 atm
- 21. Multiple ChoiceIf 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?.002766 mole.0069 mol2.766 mol9.887 mol
- 22. Multiple ChoiceTim is solving a gas law problem. He keeps getting the answer wrong and is extremely disheartened. A friend tells him that he forgot to "convert to Kelvin." What does this mean?change temperature to 273 Cadd 273 to the celsius temperaturesubtract 273 from the temperatureit's hopeless, he should give up
- 23. Multiple ChoiceIf you place a balloon in a freezer what happens to the size of the balloon?Doublesincreasesdecreasesstays still
- 24. Multiple ChoiceWhen a cold tire is inflated to a certain pressure and then is warmed up due to friction with the road, the pressure increases. This happens because theair molecules hit the walls of the tire less frequentlyrubber in the tires reacts with oxygen in the atmosphereair molecules speed up and collide with the tire walls more oftenair molecules diffuse rapidly through the walls of the tire.
- 25. Multiple ChoiceStandard temperature and pressure (STP) is defined asO .C and 1.0 atm pressure0.C and 273 mmHg pressure0K and 1.0 atm pressure0K and 760 mmHg pressure
- 26. Multiple ChoiceCompressing a gas makes the pressure _______.increasedecreasestay the sameI don't know
- 27. Multiple ChoiceConvert 300 K to oC27oC0oC-27oC573oC
- 28. Multiple ChoiceThe density of a gas is 3.07 at STP.
What is the molar mass? (M)54.2168.8173.5485.91 - 29. Multiple ChoiceWhat is the density of a sample of ammonia, NH3 at 800 mmHg and 56°C ? (M=17.0)0.512 g|L0.662 g|L0.722 g|L0.942 g|L
- 30. Multiple ChoiceFind the density of Neon gas at 0.725 atm and 25°C [Mm =20.18]0.350.470.600.79
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