57) A compressedd air-tank carried by scuba divers has a volume of 8.00 L and a pressure of 140 atm at 20'C. What is the volume of air in the tank at 0'C and 1.00 atm pressure (STP) ?
60) A sample of oxygen produced in a laboratory experiment had a volume of 590 mL at a pressure of 775 mm Hg and a temp of 352 K. What is the volume of this sample at 25 'C and 800.0 mm Hg pressure?
Avogadro's Law & Standard Molat Volume
65) How many moles of gas are in a volume of 48.6 L at STP?
68) What is the mass of CH4 in a sample that occupies a volume of 16.5 L at STP ?
69) Assume that u have 1.75 g. of deadly gas hydrogen cyanide, HCN. What is the volume of the gas at STP ?
Ideal Gas Law
76) If 2.3 moles of He has a volume of 0.15 L at 294 K, what is its pressure in atm?
78) If 15.0 g of CO2 gas has a volume of 0.30 L at 310 K, what is its pressure in mm Hg?
2006-11-24 13:59:54 · 6 answers · asked by femylatina 1 in Science & Mathematics ➔ Chemistry
totally agree with tgypoi on this. And when i give answers on here i tend to try and give the method or give a different example so that the person actually has to think about how its done rather than just copying. But dude you have pasted about 20 questions or something on here. you cant expect someone to answer all your questions....
2006-11-24 14:52:36 · answer #1 · answered by Eightball 1 · 0⤊ 0⤋
Just use the equation for combined gas law: P1V1/T1=P2V2/T2 and ideal gas equation: PV=nRT where R=0.08205 l-atm/mol-K.
convert some units to make them uniform, whether SI, metric or English. U can use also the equation: PVMolecularWeight=massRT and density=PMolecularWeight/RT. There, you can start solving those problems.
2006-11-24 15:02:01 · answer #2 · answered by carol 1 · 0⤊ 0⤋
The point of homework isn't that your teacher was wondering what the answer is and doesn't want to do it themselves. The point is that you do it and then you'll LEARN about the subject. If you get other people to do your homework for you, you'll never learn anything, and you'll end up working at McDonalds for the rest of your life, because no-one will hire someone who doesn't know anything.
2006-11-24 14:10:55 · answer #3 · answered by tgypoi 5 · 0⤊ 0⤋
65) n(moles) =v(volume) / Vstp(volume of STP)
n = 48.6 L / 2.44L
I dont have a calculator... so yah - 48.6 divided by 2.44 is---
________mol
I'm not 100% sure though....
2006-11-24 14:09:29 · answer #4 · answered by gogogo 3 · 0⤊ 0⤋
the two ought to do with residences of gases, needless to say. The mixed gasoline regulation pertains to how temp, stress and quantity are proportional to a minimum of one yet another, and compares those values of diverse gasoline samples. the proper gasoline regulation is for working with one gasoline; in case you be attentive to all yet considered one of stress, quantity, # of moles or temp, you are able to remedy on your unknown, utilising the proper gasoline consistent (wiki it). that should help...
2016-11-26 20:50:51 · answer #5 · answered by ? 4 · 0⤊ 0⤋
I'M A CHEESEFART!
2006-11-24 14:11:12 · answer #6 · answered by lil_viet_soja 2 · 0⤊ 0⤋