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?
Delete
Share
This Question is Closed
zbay
Best Response
You've already chosen the best response.
1
you can solve for n and get the mass using the periodic table and then you can solve for v
lgbasallote
Best Response
You've already chosen the best response.
0
will you please elaborate?
Carniel
Best Response
You've already chosen the best response.
0
Just get m and v :P
lgbasallote
Best Response
You've already chosen the best response.
0
how to get V?
lgbasallote
Best Response
You've already chosen the best response.
0
and m
Carniel
Best Response
You've already chosen the best response.
0
Use the other formula to find them ^_^
lgbasallote
Best Response
You've already chosen the best response.
0
how the heck can i get m o.O
lgbasallote
Best Response
You've already chosen the best response.
0
and V
lgbasallote
Best Response
You've already chosen the best response.
0
i dont think the "other formulas" can be applied
lgbasallote
Best Response
You've already chosen the best response.
0
can you demonstrate how>
NotTim
Best Response
You've already chosen the best response.
0
wats torr
lgbasallote
Best Response
You've already chosen the best response.
0
if i remember right 760 torr = 1 atm...torr is a unit of measurement for pressure
NotTim
Best Response
You've already chosen the best response.
0
p=745 torr
v=?
n=?
R=?
T=60-56 (i think)
d=? (looking for)
m=?
v=?
NotTim
Best Response
You've already chosen the best response.
0
Oh...Waht about Mm?
NotTim
Best Response
You've already chosen the best response.
0
on what @zbay say.
NotTim
Best Response
You've already chosen the best response.
0
but you still need m huh
SUROJ
Best Response
You've already chosen the best response.
2
do you know \[p =\rho \times r \times T \div M\] where rho is density and M is molecular mass
SUROJ
Best Response
You've already chosen the best response.
2
P is pressure
SUROJ
Best Response
You've already chosen the best response.
2
since n= m/M , you can get m/V = rho
lgbasallote
Best Response
You've already chosen the best response.
0
uhhh could you rewrite that equation you wrote? kinda vague... \[\huge P = \frac{\rho RT}{M}\]
lgbasallote
Best Response
You've already chosen the best response.
0
is that right?
SUROJ
Best Response
You've already chosen the best response.
2
ya
SUROJ
Best Response
You've already chosen the best response.
2
looks like it works :)
lgbasallote
Best Response
You've already chosen the best response.
0
how did you get this formula again?
SUROJ
Best Response
You've already chosen the best response.
2
n=m/M right?
lgbasallote
Best Response
You've already chosen the best response.
0
oh i see now
lgbasallote
Best Response
You've already chosen the best response.
0
so \[\frac{PM}{RT} = \rho\]
right?
R = 0.0821
SUROJ
Best Response
You've already chosen the best response.
2
ya exactly
lgbasallote
Best Response
You've already chosen the best response.
0
so which T am i going to use?
lgbasallote
Best Response
You've already chosen the best response.
0
60?
NotTim
Best Response
You've already chosen the best response.
0
probably, because that's the one that applies to this situation
SUROJ
Best Response
You've already chosen the best response.
2
the temperature at which u have to find density
lgbasallote
Best Response
You've already chosen the best response.
0
so what's 56 for? just a distraction?
SUROJ
Best Response
You've already chosen the best response.
2
ya I guess
lgbasallote
Best Response
You've already chosen the best response.
0
hmm then i need to convert torr into atm and C into K right
SUROJ
Best Response
You've already chosen the best response.
2
yup and 1 torr = 1 atm
lgbasallote
Best Response
You've already chosen the best response.
0
i thought it was 760 torr = 1 atm o.O
SUROJ
Best Response
You've already chosen the best response.
2
oo idk
lgbasallote
Best Response
You've already chosen the best response.
0
hmm okay thanks
lgbasallote
Best Response
You've already chosen the best response.
0
what would be the unit?
lgbasallote
Best Response
You've already chosen the best response.
0
i got the answer as 126.76 g/L is that right?
NotTim
Best Response
You've already chosen the best response.
0
i dunno
zbay
Best Response
You've already chosen the best response.
1
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
zbay
Best Response
You've already chosen the best response.
1
R is a constant.