lgbasallote
  • lgbasallote
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?
Chemistry
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lgbasallote
  • lgbasallote
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?
Chemistry
schrodinger
  • schrodinger
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anonymous
  • anonymous
you can solve for n and get the mass using the periodic table and then you can solve for v
lgbasallote
  • lgbasallote
will you please elaborate?
Carniel
  • Carniel
Just get m and v :P

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lgbasallote
  • lgbasallote
how to get V?
lgbasallote
  • lgbasallote
and m
Carniel
  • Carniel
Use the other formula to find them ^_^
lgbasallote
  • lgbasallote
how the heck can i get m o.O
lgbasallote
  • lgbasallote
and V
lgbasallote
  • lgbasallote
i dont think the "other formulas" can be applied
lgbasallote
  • lgbasallote
can you demonstrate how>
NotTim
  • NotTim
wats torr
lgbasallote
  • lgbasallote
if i remember right 760 torr = 1 atm...torr is a unit of measurement for pressure
NotTim
  • NotTim
p=745 torr v=? n=? R=? T=60-56 (i think) d=? (looking for) m=? v=?
NotTim
  • NotTim
Oh...Waht about Mm?
NotTim
  • NotTim
on what @zbay say.
NotTim
  • NotTim
but you still need m huh
anonymous
  • anonymous
do you know \[p =\rho \times r \times T \div M\] where rho is density and M is molecular mass
anonymous
  • anonymous
P is pressure
anonymous
  • anonymous
since n= m/M , you can get m/V = rho
lgbasallote
  • lgbasallote
uhhh could you rewrite that equation you wrote? kinda vague... \[\huge P = \frac{\rho RT}{M}\]
lgbasallote
  • lgbasallote
is that right?
anonymous
  • anonymous
ya
anonymous
  • anonymous
looks like it works :)
lgbasallote
  • lgbasallote
how did you get this formula again?
anonymous
  • anonymous
n=m/M right?
lgbasallote
  • lgbasallote
oh i see now
lgbasallote
  • lgbasallote
so \[\frac{PM}{RT} = \rho\] right? R = 0.0821
anonymous
  • anonymous
ya exactly
lgbasallote
  • lgbasallote
so which T am i going to use?
lgbasallote
  • lgbasallote
60?
NotTim
  • NotTim
probably, because that's the one that applies to this situation
anonymous
  • anonymous
the temperature at which u have to find density
lgbasallote
  • lgbasallote
so what's 56 for? just a distraction?
anonymous
  • anonymous
ya I guess
lgbasallote
  • lgbasallote
hmm then i need to convert torr into atm and C into K right
anonymous
  • anonymous
yup and 1 torr = 1 atm
lgbasallote
  • lgbasallote
i thought it was 760 torr = 1 atm o.O
anonymous
  • anonymous
oo idk
lgbasallote
  • lgbasallote
hmm okay thanks
lgbasallote
  • lgbasallote
what would be the unit?
lgbasallote
  • lgbasallote
i got the answer as 126.76 g/L is that right?
NotTim
  • NotTim
i dunno
anonymous
  • anonymous
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
anonymous
  • anonymous
R is a constant.

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