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iheartfood Group Title

#1: The following question appears on a quiz: "A 1.0 L balloon has a pressure of 153 kPa at a temperature of 60°C. How many moles of gas are inside the balloon?" A student answers 0.31 moles. Which of the following explanations is true? A. The student used the wrong value for R, and the answer should be 5.60 moles. B. The student used the wrong temperature units, and the correct answer should be 0.06 moles. C. The student's answer is correct. D. The student used the wrong volume, and the answer should be 5.60 moles. **my answer: B is that right?? @aaronq

  • one year ago
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  1. iheartfood Group Title
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    #2: You have a balloon containing 1 L of air at STP in a vacuum chamber. What will the volume of the balloon be when you reduce the pressure by half and increase the temperature to 373 K? (Use the combined gas law PV/T = k or P1V1/T1 = P2V2/T2.) A. 0.68 L B. 1.46 L C. 2.00 L D. 2.73 L **my answer: D. 2.73 L is that right?

    • one year ago
  2. aaronq Group Title
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    #1 is incorrect, how did you solve it?

    • one year ago
  3. iheartfood Group Title
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    #3: How many moles of a gas sample are in a 10.0 L container at 298 K and 203 kPa? (Use the ideal gas law PV = nRT with R = 8.31 L-kPa/mol-K.) A. 0.60 moles B. 0.82 moles C. 1.22 moles D. 1.66 moles **my answer: B. 0.82 moles is this correct?

    • one year ago
  4. iheartfood Group Title
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    #4: When you heat a 50.0 L cylinder containing 10.0 moles of oxygen to 333 K, what is the pressure inside? (Use the ideal gas law PV = nRT with R = 8.31 L-kPa/mol-K.) A. 5.46 kPa B. 12.5 kPa C. 166 kPa D. 553 kPa **my answer; D. 553 kPa is that right??

    • one year ago
  5. aaronq Group Title
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    #2 is right

    • one year ago
  6. aaronq Group Title
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    oh wait #1 i used the R for L atm, I'm not sure idk know it off by heart but if you used plugged stuff in right then it should work

    • one year ago
  7. iheartfood Group Title
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    aww darn :( for 1 i did this: PV=nRT P=153kPa V= 1.0L R= Gas Constant (.0821 L x atm/mol x K) T=333K And i kinda used them to solve for n and i got .055mol which rounds to 0.06mol. idk if i did it right.. kinda confused myself lol..... :P

    • one year ago
  8. iheartfood Group Title
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    wait so is #1 right? ;/

    • one year ago
  9. aaronq Group Title
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    lol #3 is good

    • one year ago
  10. aaronq Group Title
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    idk if 1 is right i didn't calculate it

    • one year ago
  11. aaronq Group Title
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    yes 1 is B

    • one year ago
  12. iheartfood Group Title
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    okay haha :) yay!! what about 4 and 5? :)

    • one year ago
  13. aaronq Group Title
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    4 is good (Y) ...you haven't posted a fifth haha

    • one year ago
  14. iheartfood Group Title
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    aweosme!! and lol my bad!! hahaha i forgot :( lol one sec... sorry!!

    • one year ago
  15. iheartfood Group Title
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    #5: Which of the following properties can be attributed to an ideal gas? A. The collisions of the particles are elastic. B. The particles move in definite patterns. C. The particles occupy a significant volume. D. The particles move at different velocities. **ym answer: A is that right?

    • one year ago
  16. iheartfood Group Title
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    lol posted it haha =P

    • one year ago
  17. aaronq Group Title
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    yeah, 5 is good

    • one year ago
  18. iheartfood Group Title
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    awesome!!!! :) thank you soooooo much!!!! :)

    • one year ago
  19. aaronq Group Title
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    no prob!:)

    • one year ago
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