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hi_vis360
November, 2024

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I have a question regarding the weight of oxygen

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-ROY-
Posts: 3633 - Karma: 1,503
I need to know the weight in (lbs) of 3 cubic feet of compressed oxygen. PLUS MUTHAFUCKIN K for ansers
Dec 14 2011 6:09PM
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Jakx~
Posts: 653 - Karma: 503
Whats the psi? and including the tank?

Dec 14 2011 6:10PM
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ESAND
Posts: 1607 - Karma: 744
Depends to what pressure its compressed,moron. Obviously.
Dec 14 2011 6:11PM
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Deezy
Posts: 4580 - Karma: 1,004
about 115 g
i had it all written out then lost internet so i lost it.
about 1.198 mols per foot
so triple that and mutiply it by 32 (32g/mol of O2)
Dec 14 2011 6:18PM
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Deezy
Posts: 4580 - Karma: 1,004
but thats @ SATP

if 3 cubic feet is what you have after doing the pressure calculations then i think thats correct.
if its for grd 11 chem then that should be right

or well.

1e^2 because you were only given 1 significant digit.
Dec 14 2011 6:22PM
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Jakx~
Posts: 653 - Karma: 503
Good, but that's with out the pressure.
Dec 14 2011 6:22PM
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ESAND
Posts: 1607 - Karma: 744
Math fail?
Dec 14 2011 6:23PM
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Rumi.
Posts: 1231 - Karma: 556
it's impossible to know with out some other info
Dec 14 2011 6:42PM
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Wolffy
Posts: 949 - Karma: 131
HOFNBrCl
Dec 14 2011 6:43PM
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PJS.
Posts: 11943 - Karma: 895
thAIRs no obvious answer.
Dec 14 2011 6:43PM
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frenchsteeze
Posts: 259 - Karma: 44
wat pressure man

obvs you dont know how many moles are in the tank of gas without knowing pressure
Dec 14 2011 7:03PM
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dave44
Posts: 11052 - Karma: 113
Click for larger image
Dec 14 2011 7:04PM
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FerrisBueller
Posts: 8280 - Karma: 5,173
at stp it is 115.65 grams
Dec 14 2011 7:05PM
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TheBigApple
Posts: 1169 - Karma: 488
You need to know the temperature and pressure it is at.
Dec 14 2011 7:56PM
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PJS.
Posts: 11943 - Karma: 895
no one fucking saw what I did thair
Dec 14 2011 7:56PM
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a_pla5tic_bag
Posts: 9217 - Karma: 5,399
i saw.

i only make chem jokes periodically.
Dec 14 2011 7:58PM
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-ROY-
Posts: 3633 - Karma: 1,503
3 cubic feet under 1800 psi empty weight of container 25 pounds. sry for being so vague my dad asked me to look it up. Its for something for his work. (private jets) if that helps...Everyone is getting 10/10 k. I dont know chit about this problem or chemstry at all for that matter. thanks for the help
Dec 14 2011 8:02PM
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easy.steezy
Posts: 2931 - Karma: 1,056
Haha, I love chemistry.

cats are made of iron, lithium and neon:  FeLiNe
Dec 14 2011 8:03PM
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1337
Posts: 31059 - Karma: 29,329
Na, BrO
Dec 14 2011 8:03PM
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-ROY-
Posts: 3633 - Karma: 1,503
with a compressed oxygen cylinder with a volume of 3 cubic feet at 1800 psi what is the weight at 600 psi. How much does a full cylinder weigh compared to half. We are weighing a an airplane and one of the requirements is having a full oxygen cylinder compared to lesser. It has to do with the overall weight and balance of the airplane.
Dec 14 2011 8:08PM
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Darth.Maul
Posts: 2472 - Karma: 652
PV=nRT that shit... I would do it for you but im on the pot right now...
Dec 14 2011 8:10PM
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-ROY-
Posts: 3633 - Karma: 1,503
I have no idea what that means i took begining chem in highschool and slept quite often so this is not my expertise
Dec 14 2011 8:14PM
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easy.steezy
Posts: 2931 - Karma: 1,056
PV=nRT

P=pressure V=volume n=number of mols R=.0821 atm x mol/k(i think?) and t=temperature.  when you're looking for the mass you find the number of moles by putting all of the constants on one side.  so it'd be n=PV/RT, then to convert from mols to grams you multiply it by the amount of grams per mol.
Dec 14 2011 8:43PM
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DrZoidberg
Posts: 5675 - Karma: 4,269
pressure*volume=Number of Moles*R(constant, look it up for your specific units)*temperature(in kelvin).

Lol at chem jokes.
Dec 14 2011 8:45PM
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Darth.Maul
Posts: 2472 - Karma: 652
FYI
Pressure needs to be in mm Hg
Temperature needs to be in Kelvin


Dec 14 2011 8:47PM
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DrZoidberg
Posts: 5675 - Karma: 4,269
The units of everything depend on the value of R you look up.

What do you call a benzene ring with all irons instead of carbons?











A ferrous wheel. Official chemistry jokes thread? Please?
Dec 14 2011 8:49PM
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easy.steezy
Posts: 2931 - Karma: 1,056
No, pressure should be in atm.  If it's given in mm Hg, then you have to divide by 760 and cause it's only 3 sig figs then you round to the nearest thousandth.  But yes, temperature must be in Kelvin, which is just adding 273 to the Celsius temperature.
Dec 14 2011 8:52PM
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a_pla5tic_bag
Posts: 9217 - Karma: 5,399
also, why is that chem problem in feet and pounds and such? who works in imperial units besides americans? plus I work in metric and i'm in delaware.
Dec 14 2011 8:55PM
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p-fo
Posts: 9372 - Karma: 6,155
Nice. I had a cation as a pet once. It was a positive experience.
Dec 14 2011 8:56PM
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yuck
Posts: 8384 - Karma: 2,090
nice.
Dec 14 2011 8:58PM
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Darth.Maul
Posts: 2472 - Karma: 652
A photon checks into a hotel and the barhop asks him if he needs help with his luggage. He responds, "No thanks, I'm traveling light!"

So this electron is talking to his buddies in his ground state and he tells his friend about this hot electron that he met the other day in a higher energy level. His friend asks him how he's going to contact her and he replies, "I got her quantum number!"

A man walks into a bar and says, "I'd like some H20"
Another man says, "I'd like some H20 too."
.
.
.
.
.
He died





And I'm done
Dec 14 2011 8:58PM
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gus555
Posts: 4170 - Karma: 34
Oxygen weighs nothing you dumb fucks if it did we'd all be crushed because we're surrounded by it, fucking idiot 12 year olds on this site sometimes god damn.
Dec 14 2011 8:59PM
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Darth.Maul
Posts: 2472 - Karma: 652
I'm saying troll but if not then you can go fist your ass...
Dec 14 2011 9:01PM
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.Emerson.
Posts: 1548 - Karma: 16
lol'd
Dec 14 2011 9:15PM
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chicken
Posts: 6843 - Karma: 2,121
haha
Dec 14 2011 9:18PM
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easy.steezy
Posts: 2931 - Karma: 1,056
Hahaha this made my day. If only I could've put this as an answer to my Chem test last week!
Dec 14 2011 10:00PM
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dprice21
Posts: 295 - Karma: 23
hahaha thank you.
Dec 14 2011 10:06PM
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DrZoidberg
Posts: 5675 - Karma: 4,269
That would be gold. On my orgo final, if I couldn't think of the answer for a synthesis problem I was gonna list some reagents as "magic" or something. But that situation never arose...

Heisenberg got pulled over once. The cop yelled at him: "Do you know how fast you were going?". Hiesenberg simply stated his exact coordinates, and said: "No, and neither do you."
Dec 14 2011 10:56PM
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.Capn.
Posts: 1454 - Karma: 152
Yeah, I can vouch for this.
Dec 14 2011 11:00PM
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C-Burg
Posts: 4729 - Karma: 130
m=(P*V)/(R*T)
Dec 14 2011 11:29PM
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a_pla5tic_bag
Posts: 9217 - Karma: 5,399
Click for larger image
i lold
Dec 15 2011 12:15AM
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I_Am_Mod
Posts: 13214 - Karma: 3,753
best one so far !
Dec 15 2011 7:21AM
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