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lgbasallote

  • 3 years ago

uranium hexafluoride is a solid at room temperature, but it boils at \(56^o C\).determine the density of uranium hexafluoride at \(60^o C\) and 745 torr. i know d = m/v and PV = nRT but how can i use them here? or do i even use them here?

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  1. zbay
    • 3 years ago
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    you can solve for n and get the mass using the periodic table and then you can solve for v

  2. lgbasallote
    • 3 years ago
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    will you please elaborate?

  3. Carniel
    • 3 years ago
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    Just get m and v :P

  4. lgbasallote
    • 3 years ago
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    how to get V?

  5. lgbasallote
    • 3 years ago
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    and m

  6. Carniel
    • 3 years ago
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    Use the other formula to find them ^_^

  7. lgbasallote
    • 3 years ago
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    how the heck can i get m o.O

  8. lgbasallote
    • 3 years ago
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    and V

  9. lgbasallote
    • 3 years ago
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    i dont think the "other formulas" can be applied

  10. lgbasallote
    • 3 years ago
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    can you demonstrate how>

  11. NotTim
    • 3 years ago
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    wats torr

  12. lgbasallote
    • 3 years ago
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    if i remember right 760 torr = 1 atm...torr is a unit of measurement for pressure

  13. NotTim
    • 3 years ago
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    p=745 torr v=? n=? R=? T=60-56 (i think) d=? (looking for) m=? v=?

  14. NotTim
    • 3 years ago
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    Oh...Waht about Mm?

  15. NotTim
    • 3 years ago
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    on what @zbay say.

  16. NotTim
    • 3 years ago
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    but you still need m huh

  17. SUROJ
    • 3 years ago
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    do you know \[p =\rho \times r \times T \div M\] where rho is density and M is molecular mass

  18. SUROJ
    • 3 years ago
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    P is pressure

  19. SUROJ
    • 3 years ago
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    since n= m/M , you can get m/V = rho

  20. lgbasallote
    • 3 years ago
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    uhhh could you rewrite that equation you wrote? kinda vague... \[\huge P = \frac{\rho RT}{M}\]

  21. lgbasallote
    • 3 years ago
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    is that right?

  22. SUROJ
    • 3 years ago
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    ya

  23. SUROJ
    • 3 years ago
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    looks like it works :)

  24. lgbasallote
    • 3 years ago
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    how did you get this formula again?

  25. SUROJ
    • 3 years ago
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    n=m/M right?

  26. lgbasallote
    • 3 years ago
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    oh i see now

  27. lgbasallote
    • 3 years ago
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    so \[\frac{PM}{RT} = \rho\] right? R = 0.0821

  28. SUROJ
    • 3 years ago
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    ya exactly

  29. lgbasallote
    • 3 years ago
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    so which T am i going to use?

  30. lgbasallote
    • 3 years ago
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    60?

  31. NotTim
    • 3 years ago
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    probably, because that's the one that applies to this situation

  32. SUROJ
    • 3 years ago
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    the temperature at which u have to find density

  33. lgbasallote
    • 3 years ago
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    so what's 56 for? just a distraction?

  34. SUROJ
    • 3 years ago
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    ya I guess

  35. lgbasallote
    • 3 years ago
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    hmm then i need to convert torr into atm and C into K right

  36. SUROJ
    • 3 years ago
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    yup and 1 torr = 1 atm

  37. lgbasallote
    • 3 years ago
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    i thought it was 760 torr = 1 atm o.O

  38. SUROJ
    • 3 years ago
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    oo idk

  39. lgbasallote
    • 3 years ago
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    hmm okay thanks

  40. lgbasallote
    • 3 years ago
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    what would be the unit?

  41. lgbasallote
    • 3 years ago
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    i got the answer as 126.76 g/L is that right?

  42. NotTim
    • 3 years ago
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    i dunno

  43. zbay
    • 3 years ago
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    set n to 1 and solve for V then you take the molar mass of the molecule you are looking at and calculate your density

  44. zbay
    • 3 years ago
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    R is a constant.

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