Gas Laws 2

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Miami Dade College, Miami *

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2010

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Chemistry

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Jan 9, 2024

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docx

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2

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Name: Haidriana Logreira Period: 4 Gas Laws WS 2 (SHOW WORK; UNITS; SIG. FIGS) 1. A 1.30 L balloon is taken from room temperature (25.0° C) and placed into a freezer at -11.5° C. What is its new volume? (Pressure is constant) 2. A container of oxygen gas is at standard temperature and pressure (STP; 1 atm of pressure and 0° C). If this sample is put into an oven at 280° C, what would its pressure be, in atmospheres? (Volume is constant) 3. You have a 2.40 L container of air at STP. From out of nowhere, Bigfoot stomps on it, decreasing the container’s volume down to 0.500 L and increasing the pressure to 8.00 atmospheres. How hot, in 0 C, is the air in the container now? 4. You’re at the zoo and have a big red 1.80 L helium balloon. The barometric pressure today is 785 mmHg. Then you hear the roar of a lion. Startled, you accidentally release the balloon. It flies away. By the time it reaches the clouds, the atmospheric pressure that high is only 3.00 atmospheres. What would the volume of the balloon up there? (Temperature is constant) 5. A 12.0 L sample of NO 2 gas is at STP. What would be its new volume if its pressure was decreased to 575 mmHg and its temperature was doubled? 6. A 5.75 gram sample of nitrogen gas is at STP. What would be its volume if its temperature was increased to 317 0 C? (Pressure is constant) 7. A sample of Cl 2 gas occupies a volume of 11.4 L at 3.50 atmospheres. When the Cl 2 is changed to STP conditions, what will be its volume? 8. What volume would 3.00 moles of neon gas have at 295 K and 645 mmHg? 9. What volume would 4.3 moles of hydrogen gas occupy at 45° C and 3.22 atm? 10. How much pressure would 4.85 moles of He gas exert in a 4.50 L tank at 55° C?
Name: Haidriana Logreira Period: 4 11. How many moles of CO 2 could fit in a 475 mL bag a -22° C and 855 mmHg? 12. How many grams of oxygen gas are there in a 2.3L tank at 7.5 atm and 24° C? 13. How many moles of N 2 could fit in a 2.00 L soda bottle at 23° C and 755 mmHg? 14. What pressure would be needed to fit 35.0 g of N 2 gas into a 195 mL flask at 0° C? 15. What volume would be occupied by 16.0 g of CH 4 at 0°C and 760 mmHg? 16. Not a multiple choice question: a. What is the mass of 1.00 mole of Ne? b. What would be the volume of 1.00 mole of Ne at 34° C and 0.862 atm? c. What would be the density of 1.00 mole of Ne at 34° C and 0.862 atm? 17. 2.58 g of a gas has a volume of 3.97 L at 745 mmHg and 21° C. Determine the molar mass of the gas. What might it be? 18. How many moles of sodium will react with 2.6 L of Cl 2 gas at 1.15 atm and 39° C? (Use the balanced equation: 2Na + Cl 2 ? 2NaCl) 19. How many grams of propane (C 3 H 8 ) will react with 3.29 L of O 2 at 1.05 atm and -34° C? (Balance & use this equation: __ C 3 H 8 + __ O 2 ? __CO 2 + __ H 2 O) 20. At a certain temperature, CH 4 molecules move with an average velocity of 187 m/sec. At that same temperature, gas X particles have an average velocity of 141 m/sec. What is the molar mass of gas X? What is a possible identity of gas X?
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