Bodybuilding.com Information Motivation Supplementation
in:

    The World’s #1 Bodybuilding And Fitness Forum - Save Up To 50% Off Retail Prices In Our Bodybuilding.com Store!

Reply
Results 1 to 23 of 23
  1. #1
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline

    Chemistry Help Needed(Reps for help)

    I don't need the answers, because i already have them, but i need to know how to do the following questions:

    1. If the pressure of a gas sample is quadrupled and the ablsolute temperature is doubled, by what factr does the volume of the sample change?

    2. At what temp will a fixed amount of gas with a volume of 175 L at 15 degree celcius and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg?

    3. Calculate the volume occupied by 25.2 g of CO2 at 0.84 atm and 25 degrees celcius.

    4.How many molecules of N2 gas can be present in a 2.5L flask at 50 degree celcius and 650 mmHg?

    5. Calculate the density in g/L of CO2 gas at 27 degree C and 0.5 atm pressure.

    6. 1.018 g of Freon -113 gas is trapped in a 145 mL container at 760 mm Hg and 50.0 degree C what is the molar mass of freon 113?



    I know, these questions may be easy for you, but i have NO idea how to do them since my teacher doesnt really teacha nd just expects us to learn from the book (which is hard because the explanations suck). Thank you.
    I rep back
    Reply With Quote

  2. #2
    Registered User colt.45's Avatar
    Join Date: Sep 2007
    Age: 24
    Posts: 11,204
    BodyPoints: 11537
    Rep Power: 962
    colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000) colt.45 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit colt.45's BodySpace
    colt.45 is offline
    pv=nrt
    Reply With Quote

  3. #3
    aaa TunaMan5's Avatar
    Join Date: Nov 2006
    Age: 28
    Posts: 973
    Rep Power: 210
    TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000)
    TunaMan5 is offline
    they are easy but just put in the equation...i dont wanna go look for it now
    "I'm not afraid of loving my enemies...
    I honestly want peace with you.
    But when you come against my country,
    When you come against my family,
    You try to destroy my people,
    I can't just stand by...
    I am coming, and if I come, then
    Pain is coming with me!"
    Reply With Quote

  4. #4
    Registered User Reservoir Dog's Avatar
    Join Date: Feb 2003
    Age: 33
    Stats: 5'10", 192 lbs
    Posts: 2,686
    BodyPoints: 6329
    Rep Power: 2605
    Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000) Reservoir Dog has reached the pinnacle! Best possible rank! (+1000000)
    Visit Reservoir Dog's BodySpace
    Reservoir Dog is offline
    1) Green

    2) Pencil

    3) Hedgehog

    4) Not sure on this one

    5) 139

    6) Scott Bacula


    hope this helps


    Proudly calling OP a phaggot since 2003
    Reply With Quote

  5. #5
    Hai agile321's Avatar
    Join Date: Jun 2007
    Location: Illinois, United States
    Age: 22
    Stats: 6'0", 166 lbs
    Posts: 3,761
    BodyPoints: 8518
    Rep Power: 3110
    agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000) agile321 has reached the pinnacle! Best possible rank! (+1000000)
    Visit agile321's BodySpace
    agile321 is offline
    Originally Posted by colt.45 View Post
    pv=nrt
    yea thats it, temperature needs to be in Calvin, n = moles and r is constant depending on the unit you used for pressure
    Reply With Quote

  6. #6
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline
    Thanks, i guess...
    I rep back
    Reply With Quote

  7. #7
    Boomer Sooner KenshinR1's Avatar
    Join Date: Sep 2007
    Stats: 3'2", 162 lbs
    Posts: 1,194
    BodyPoints: 3581
    Rep Power: 189
    KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit KenshinR1's BodySpace
    KenshinR1 is offline
    ideal gas law: (pressure: atm)(volume: liter)=(mole)(gas constant: .08206 L atm/ mole Kelvin)(temperature: Kelvin)


    PV=nRT
    Reply With Quote

  8. #8
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline
    Originally Posted by KenshinR1 View Post
    ideal gas law: (pressure: atm)(volume: liter)=(mole)(gas constant: .08206 L atm/ mole Kelvin)(temperature: Kelvin)


    PV=nRT
    I know that, but i did it for number 3 and i came out with 733.974 L and the answer is 16.9 L. I did something wrong. this is what i did:

    0.84V=(25.2)(0.0821)(298)

    Thats PV=nRT With everything substituted exept for V because thtas what im trying to find. I divided the left and right side of the equation by 0.84 and V=734
    but the answer is 16.9. I dont get it.
    I rep back
    Reply With Quote

  9. #9
    NINERS!!!! Jmh80's Avatar
    Join Date: May 2005
    Location: Texas, United States
    Stats: 5'11", 175 lbs
    Posts: 4,625
    BodyPoints: 7252
    Rep Power: 1163
    Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000) Jmh80 has reached the pinnacle! Best possible rank! (+1000000)
    Visit Jmh80's BodySpace
    Jmh80 is offline
    1. half

    I hope you know the units for volume, temperature, pressure, moles, and pressure.
    Once you figure those out - use the PerVert = NeRT equation listed above.
    RIP Dad

    Got an engineering question? We can help:
    http://forum.bodybuilding.com/showthread.php?t=158772523
    Reply With Quote

  10. #10
    aaa TunaMan5's Avatar
    Join Date: Nov 2006
    Age: 28
    Posts: 973
    Rep Power: 210
    TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000)
    TunaMan5 is offline
    Originally Posted by Lol312 View Post
    I don't need the answers, because i already have them, but i need to know how to do the following questions:

    1. If the pressure of a gas sample is quadrupled and the ablsolute temperature is doubled, by what factr does the volume of the sample change?

    Decreases by 2 ....v=nrt/p = V = nr*2/4

    2. At what temp will a fixed amount of gas with a volume of 175 L at 15 degree celcius and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg?

    pv=nrt....I guess calculate n and plug it into new equation using BOLDED numbers

    3. Calculate the volume occupied by 25.2 g of CO2 at 0.84 atm and 25 degrees celcius.

    convert 25.3g to moles (12.01 +32 g/mol)...use that to obtain V

    4.How many molecules of N2 gas can be present in a 2.5L flask at 50 degree celcius and 650 mmHg?

    use pv=nrt to calculate n (moles) and then use Avocados number to obtain # of molecules

    5. Calculate the density in g/L of CO2 gas at 27 degree C and 0.5 atm pressure.


    6. 1.018 g of Freon -113 gas is trapped in a 145 mL container at 760 mm Hg and 50.0 degree C what is the molar mass of freon 113?



    I know, these questions may be easy for you, but i have NO idea how to do them since my teacher doesnt really teacha nd just expects us to learn from the book (which is hard because the explanations suck). Thank you.
    I will read 5 and 6 in 5 min and answer them

    pv=nrt

    Pressure - p
    Volume = v
    mols = n
    R is constant = 0.083 etc
    Temp = t
    "I'm not afraid of loving my enemies...
    I honestly want peace with you.
    But when you come against my country,
    When you come against my family,
    You try to destroy my people,
    I can't just stand by...
    I am coming, and if I come, then
    Pain is coming with me!"
    Reply With Quote

  11. #11
    Boomer Sooner KenshinR1's Avatar
    Join Date: Sep 2007
    Stats: 3'2", 162 lbs
    Posts: 1,194
    BodyPoints: 3581
    Rep Power: 189
    KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit KenshinR1's BodySpace
    KenshinR1 is offline
    Originally Posted by Lol312 View Post
    I know that, but i did it for number 3 and i came out with 733.974 L and the answer is 16.9 L. I did something wrong. this is what i did:

    0.84V=(25.2)(0.0821)(298)

    Thats PV=nRT With everything substituted exept for V because thtas what im trying to find. I divided the left and right side of the equation by 0.84 and V=734
    but the answer is 16.9. I dont get it.
    that is 25.2 grams, you gotta convert it to moles
    Reply With Quote

  12. #12
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline
    Originally Posted by KenshinR1 View Post
    that is 25.2 grams, you gotta convert it to moles
    Oh, ok let me try that now. *reps to both above posters*
    I rep back
    Reply With Quote

  13. #13
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline
    Whoah, thanks Kenshin, i got the right answer.
    I rep back
    Reply With Quote

  14. #14
    Registered User hobbes1651's Avatar
    Join Date: Feb 2007
    Age: 29
    Stats: 5'10", 244 lbs
    Posts: 1,720
    BodyPoints: 10963
    Rep Power: 93
    hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000) hobbes1651 has a brilliant future. Third best rank! (+40000)
    Visit hobbes1651's BodySpace
    hobbes1651 is offline
    Originally Posted by colt.45 View Post
    pv=nrt
    dude this is all you need to know!!
    History is a set of lies agreed upon.
    -Napoleon Bonaparte

    "A government is the most dangerous threat to man's rights: it holds a legal monopoly on the use of physical force against legally disarmed victims."
    Ayn Rand
    Reply With Quote

  15. #15
    aaa TunaMan5's Avatar
    Join Date: Nov 2006
    Age: 28
    Posts: 973
    Rep Power: 210
    TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000)
    TunaMan5 is offline
    Originally Posted by Lol312 View Post
    I don't need the answers, because i already have them, but i need to know how to do the following questions:

    1. If the pressure of a gas sample is quadrupled and the ablsolute temperature is doubled, by what factr does the volume of the sample change?

    2. At what temp will a fixed amount of gas with a volume of 175 L at 15 degree celcius and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg?

    3. Calculate the volume occupied by 25.2 g of CO2 at 0.84 atm and 25 degrees celcius.

    4.How many molecules of N2 gas can be present in a 2.5L flask at 50 degree celcius and 650 mmHg?

    5. Calculate the density in g/L of CO2 gas at 27 degree C and 0.5 atm pressure.

    6. 1.018 g of Freon -113 gas is trapped in a 145 mL container at 760 mm Hg and 50.0 degree C what is the molar mass of freon 113?



    I know, these questions may be easy for you, but i have NO idea how to do them since my teacher doesnt really teacha nd just expects us to learn from the book (which is hard because the explanations suck). Thank you.
    5. pv=nrt becomes n/v = p / rt where I believe u will get mol/L and use CO2 (44.01 g/mol) to obtain g/L

    6. pv=nrt just find n (moles) and divide 1.018 g by moles


    I assume u will convert all of these to right units
    "I'm not afraid of loving my enemies...
    I honestly want peace with you.
    But when you come against my country,
    When you come against my family,
    You try to destroy my people,
    I can't just stand by...
    I am coming, and if I come, then
    Pain is coming with me!"
    Reply With Quote

  16. #16
    BRB Gainin' toasty's Avatar
    Join Date: Oct 2007
    Location: State College, Pennsylvania, United States
    Age: 26
    Stats: 6'1", 185 lbs
    Posts: 505
    BodyPoints: 2188
    Rep Power: 72
    toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000) toasty has a brilliant future. Third best rank! (+40000)
    Visit toasty's BodySpace
    toasty is offline
    #4 find the mols of gas and multiply it by avogadro's number 6.0221415 ? 10^23
    PSU
    Reply With Quote

  17. #17
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline
    Originally Posted by TunaMan5 View Post
    5. pv=nrt becomes n/v = p / rt where I believe u will get mol/L and use CO2 (44.01 g/mol) to obtain g/L

    6. pv=nrt just find n (moles) and divide 1.018 g by moles


    I assume u will convert all of these to right units
    can you teach me number 5 step by step please? i dont understand it at all.
    I rep back
    Reply With Quote

  18. #18
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline
    Bump. Need help please
    I rep back
    Reply With Quote

  19. #19
    Registered User DarkForteGS's Avatar
    Join Date: Feb 2007
    Age: 26
    Stats: 5'7", 193 lbs
    Posts: 713
    BodyPoints: 4733
    Rep Power: 163
    DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000) DarkForteGS has a reputation beyond repute. Second best rank possible! (+100000)
    Visit DarkForteGS's BodySpace
    DarkForteGS is offline
    5. Calculate the density in g/L of CO2 gas at 27 degree C and 0.5 atm pressure.


    P=0.5 atm
    T=300 K
    R= 8.314 L*kPa/(K*mol)

    convert atm to kPa. 1 atm=101.3 kPa; therefore 0.5 atm=50.65 kPa

    solve for n/V.

    n/V=P/RT
    n/V=50.65/8.314/300 =0.020307 mol/L

    your molecular weight is 16+16+12=44 g/mol

    density = MW * n/V = 44 g/mol * 0.020307 mol/L = 0.8935 g/L
    Last edited by DarkForteGS; 01-24-2008 at 08:20 PM.
    Reply With Quote

  20. #20
    Boomer Sooner KenshinR1's Avatar
    Join Date: Sep 2007
    Stats: 3'2", 162 lbs
    Posts: 1,194
    BodyPoints: 3581
    Rep Power: 189
    KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000) KenshinR1 has a reputation beyond repute. Second best rank possible! (+100000)
    Visit KenshinR1's BodySpace
    KenshinR1 is offline
    Originally Posted by Lol312 View Post
    5. Calculate the density in g/L of CO2 gas at 27 degree C and 0.5 atm pressure.
    PV=nRT

    density = mass/volume

    so (n/V) = P/RT

    (.5 atm / .08206 L atm * 300K ) x 44 g/mol
    mol K
    Last edited by KenshinR1; 01-24-2008 at 08:23 PM.
    Reply With Quote

  21. #21
    aaa TunaMan5's Avatar
    Join Date: Nov 2006
    Age: 28
    Posts: 973
    Rep Power: 210
    TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000)
    TunaMan5 is offline
    Originally Posted by Lol312 View Post
    I don't need the answers, because i already have them, but i need to know how to do the following questions:

    1. If the pressure of a gas sample is quadrupled and the ablsolute temperature is doubled, by what factr does the volume of the sample change?

    2. At what temp will a fixed amount of gas with a volume of 175 L at 15 degree celcius and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg?

    3. Calculate the volume occupied by 25.2 g of CO2 at 0.84 atm and 25 degrees celcius.

    4.How many molecules of N2 gas can be present in a 2.5L flask at 50 degree celcius and 650 mmHg?

    5. Calculate the density in g/L of CO2 gas at 27 degree C and 0.5 atm pressure.

    6. 1.018 g of Freon -113 gas is trapped in a 145 mL container at 760 mm Hg and 50.0 degree C what is the molar mass of freon 113?



    I know, these questions may be easy for you, but i have NO idea how to do them since my teacher doesnt really teacha nd just expects us to learn from the book (which is hard because the explanations suck). Thank you.
    OK .....You know that the equation is pv=nrt
    u are given Temp and Pressure, R is constant so it is always the same

    now u rearrange the formula and u will get n (mol) /v (L) = p (atm) / r (.08206 L atm/ mole Kelvin) t (Kelvin) where u will get a result in mol / L because atm/Kelvin cancel ....

    Now u have n / Volume = mol / L and because u want the answer in g/L u use g/mol of CO2 which is 44.01 g/mol

    SO.... n/V = mol/L * 44.01 g/mol = g/L

    There
    "I'm not afraid of loving my enemies...
    I honestly want peace with you.
    But when you come against my country,
    When you come against my family,
    You try to destroy my people,
    I can't just stand by...
    I am coming, and if I come, then
    Pain is coming with me!"
    Reply With Quote

  22. #22
    aaa TunaMan5's Avatar
    Join Date: Nov 2006
    Age: 28
    Posts: 973
    Rep Power: 210
    TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000) TunaMan5 has a reputation beyond repute. Second best rank possible! (+100000)
    TunaMan5 is offline
    so u get it now...
    "I'm not afraid of loving my enemies...
    I honestly want peace with you.
    But when you come against my country,
    When you come against my family,
    You try to destroy my people,
    I can't just stand by...
    I am coming, and if I come, then
    Pain is coming with me!"
    Reply With Quote

  23. #23
    Registered User Lol312's Avatar
    Join Date: Jun 2007
    Age: 22
    Stats: 5'10", 180 lbs
    Posts: 745
    BodyPoints: 5588
    Rep Power: 31
    Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000) Lol312 has much to be proud of. One of the best! (+20000)
    Visit Lol312's BodySpace
    Lol312 is offline
    thank you.
    I rep back
    Reply With Quote

Reply

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Home Store Products Careers Help Contact Us Terms of Use Checkout