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July 29, 2015

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chemistry
At 25 degrees celsius and 1.0 atm, 0.25g of a gas dissolves in 1.00L of water. What mass of the gas dissolves in 1.00 L of water at 25 degrees celsius and 3.0 atm?
March 31, 2008 by Anonymous

AP Chemistry
I need alot of help on this problem, it is due WEDNESDAY and I have no clue how to do it Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it ...
January 21, 2008 by Eric

Chemistry
if one mole of gas occupies 22.4L at STP what is the volume at 25 degress C. and 3.05 atmosphere?
September 25, 2011 by Laura

Chem
the absolute temperature of the gas at which 3.33 10-3 mol occupies 246 mL at 713 torr
May 8, 2014 by Sarah Pick

chemistry
an ideal gas in a closed inflexible container has a pressure of 6 atms and a temperature of 27 degree c. What will be the new pressure of gas of temperature is decreased to -73 degree c. 1) 2atm 2) 3atm 3) 4atm 4) 8atm 5) 9atm
August 27, 2011 by marjani

Chemistry
At the temperature of 30degree C and pressure of 1*10^5 pa, 30dm3 of H2 gas is burned with 30dm3 of O2 gas in a container of 60dm3. Calculate the pressure different after the complete combustion and cooling upto 30degree C again.
February 25, 2013 by Emma

Chemistry
1) A quantity of 85 mL of .900 M HCl is mixed with 85 mL of .900 M KOH in a constant-pressure calorimeter that has a heat capacity of 325 J/C. If the initial temperatures of both solutions are the same at 18.24 degrees C, what is the final temperature of the mixed solution? 2...
November 18, 2014 by Vince

Chemistry problem
The volume of an ideal gas contracts from 5.68 L to 2.35 L as the result of a constant applied pressure of 1.48 atm. The system releases 733 J of heat during this process. Calculate deltaU (internal energy) for this process. Express answer in Joules. Please help, thank you ...
October 21, 2012 by Tymee

Chemistry problem
The volume of an ideal gas contracts from 5.68 L to 2.35 L as the result of a constant applied pressure of 1.48 atm. The system releases 733 J of heat during this process. Calculate deltaU (internal energy) for this process. Express answer in Joules. Please help, thank you ...
October 21, 2012 by Tymee

chem
6.01-L cylinder contains 1.25 mol of gas A and 4.54 mol of gas B, at a temperature of 32.8 C. Calculate the partial pressure of each gas in the cylinder. Assume ideal gas I have work this question three time and can not get the rt answer
December 1, 2013 by dinah

chem
6.01-L cylinder contains 1.25 mol of gas A and 4.54 mol of gas B, at a temperature of 32.8 C. Calculate the partial pressure of each gas in the cylinder. Assume ideal gas I have work this question three time and can not get the rt answer
December 1, 2013 by dinah

chemistry
A volume of 35.0 mL of nitrogen gas was collected over water at 24 degrees C and 99.1kPa. The vapor pressure of water at this temperature is 2.99 kPa. What is the pressure of the nitrogen gas alone?
June 14, 2010 by Edward

Chemistry-Gas Laws
At 0 degrees celcius, a 1.0 L flask contains 5.0 x 10^-2 mol N2, 1.5 x 10^2 mg O2, 5.0 x 10^21 molecules NH3. Calculate the partial pressure of each gas and what is the total pressure in the flask. How do I calculate this?
May 8, 2012 by Bran

Chemistry
A 20.9 L container filled with gas at 0.845 atm and 64.0C contains __________ mol of gas. Express answer to three decimal places
April 22, 2010 by Camarra

chemistry urgent
hydrogen gas is collected in a bottle, and the pressure of the gas is 892 torr at 24 C. what is the pressure of hydrogen gas when the temperature decreases to 20 C? chemistry - DrBob222, Tuesday, November 30, 2010 at 1:25pm (P1/T1) = (P2/T2) Dear Dr Bob: is this a right ...
November 30, 2010 by Lynn

chemistry
a 5.0 dm3 sample of oxygen at a pressure of 200 kPa and 2.0 dm3 sample of nitrogen at a pressure of 500 kPa are introduced into a 2.5 dm3 vessel. what is the total pressure in the vessel?
April 10, 2011 by sandra

chem
compund containing only C, H, and N yeilds the following data- 1. complete combustion of 34.3 mg of the compund producedmg of CO2 and 40.3 mg of H2O 2. a 65.2mg sample was analyzed by the dumas mthod, giving 35.6 mL of N2 at 740 torr and 25C 3. effusion rate as a gas was 24....
November 16, 2007 by mel

compressor operations
We are operating a centrifugal compressor. The gas composition does not change during this excursion. While holding suction pressure and flowrate constant, the inlet temperature rises. What would you expect to happen to the discharge pressure, and why
January 29, 2014 by Tony

Chemistry
In this problem, your answers should be mathematical expressions involving a variable. Consider an ideal gas with an absolute temperature of T1 To what temperature would you need to heat the gas to double its pressure? T2=? I got T2=T1P times 2 but it is wrong
October 17, 2012 by Bill

Chemistry 20
a) If the pressure and volume of a gas both increase, will the temperature increase or decrease? b) If the pressure is doubled and the volume is tripled, by what factor must the temperature increase or decrease? c) If the pressure of the gas is decreased by removing some of ...
November 6, 2010 by R

Chemistry
Using the information on the table of van der Waals Constants of Some Common gases, calculate the pressure exerted by 4.37 moles of chlorine gas confined in a volume of 2.45 L at 38 degrees Celsius. Compare the pressure with that calculated using the ideal gas equation.
April 10, 2012 by Kathi

Chemistry
Using the information on the table of van der Waals Constants of Some Common gases, calculate the pressure exerted by 4.37 moles of chlorine gas confined in a volume of 2.45 L at 38 degrees Celsius. Compare the pressure with that calculated using the ideal gas equation.
April 10, 2012 by Kathi

Chemistry
Using the information on the table of van der Waals Constants of Some Common gases, calculate the pressure exerted by 4.37 moles of chlorine gas confined in a volume of 2.45 L at 38 degrees Celsius. Compare the pressure with that calculated using the ideal gas equation.
April 10, 2012 by Kathi

Introduction to Chemistry
Hydrogen gas has a pressure of 765mm Hg, a volume of 355mL,and a temperature of 22 degrees C. What is the new volume of this gas if the pressure is 5.1atm,and at a temperature of 48degrees C?
April 22, 2014 by Renee

chemistry help!!!!!
Consider the following reaction: Find the equilibrium partial pressures of A and B for each of the following different values of Kp. Assume that the initial partial pressure of B in each case is 1.0 atm, and that the initial partial pressure of A is 0.0 atm. Make any ...
March 11, 2012 by student

physics
A cylinder with a moveable piston holds 3.00 of argon at a constant temperature of 300 . As the gas is compressed isothermally, its pressure increases from 101 to 125 .Find the final volume of the gas.Find the work done by the gas.Find the heat added to the gas.
December 9, 2010 by demitri

chemistry
Water has an equilibrium vapor pressure of 23.8 mm Hg at 25 C. If 1.00 g H2O is sealed in a 20 L flask, what mass will remain in the liquid phase when equilibrium is established? ( 760 mmHg = 1 atm, R =0.0821 L.atm/mol.K)
January 22, 2011 by daniel

Chemistry
Calculate the osmotic pressure of a 6.0 10-2 M solution of NaCl at 20C (293 K). Okay when I set up problem MRT....I get something totally different from the answer 2.9 atm. Could u please show me your set up to get to 2.9 atm? Thanks a billion!!
October 29, 2011 by Chemistry Chick

chemistry
To identify a diatomic gas (x2), a researcher carried out the following experiment: She weighed an empty 3.4L- bulb, then filled it with the gas at 1.20 atm and 22.0 C and weighed it again. The difference in mass was 4.7g . Identify the gas. Express your answer as a chemical ...
November 18, 2011 by unknown

chemistry
at a deep-sea station 200m below the surface of the Pacific Ocean, workers live in a highly pressurized environment. How many lites of gas at STP must be compressed on the surface to fill the underwater environmen with 2.00 x 10^7 of gas at 20.0 atm? What gas law do you use to...
May 20, 2010 by Billy

chem
Benzaldehyde, C6H5CHO}, has a normal boiling point of 179.0 C and a critical point at 422 C and 45.9 atm. Using a phase diagram, estimate its vapor pressure at 125 Degrees I'm directing it up again to Dr. Bob. (or anyone else who can help) **** If the boiling point (179) is at...
February 12, 2010 by joe

Chemistry
A sample of natural gas at STP is 78% CH4 and 22% C2H6 by volume. How many moles of each gas are present in 1.60L of the mixture? Assume ideal gas behavior
October 6, 2010 by Missy

chemistry
A sample of nitrogen gas has the temperature drop from 250C to 150C at constant pressure. What is the final volume if the initial volume is 310 mL?
July 30, 2014 by pari

Chemistry
A sample of a smoke stack emission was collected into a 1.25 L at 752 mm Hg and analyzed. The analysis showed 92% CO2, 3.6% NO, 1.2% SO2, and 4.1% H2O by mass. What is the partial pressure exerted by each gas?
November 15, 2014 by Aaqib Zaman

Chemistry
"Under constant conditions of P(pressure) and T(temperature) (and R [gas constant]), write an equation showing d(density) written as a function of M(molecular mass)." I don't understand this, really! Please help! Thanks in advance!
January 13, 2008 by TAG

Chemistry
What mass of helium gas is needed to pressurize a 98.0 L tank to 165 atm at 21 C? What mass of oxygen gas would be needed to pressurize a similar tank to the same specifications
May 27, 2015 by Yakima valley communtiy college

maths &chemistry
Nitrogen tetraoxide is known to dissociate accoding to the equation;N2O4(g)_2NO2(g).A250mlsample of the gas mixture weighs 0.257bar.Calculate the partial pressure of each gas.(Hint:obtain the pressure it had before dissociation ,and then use the idea of equilibrium constant to...
November 30, 2010 by SAIDI

Chem
Classify each of theses changes as a positive or negative change in entropy of a sample of this green gas. A) chlorine gas condense to a liquid = - B) chlorine gas is heated in a container= + C) chlorine gas deposits on a cold surface= -
March 8, 2013 by Can someone check this for me really quick

Chem AP
A 0.505-g sample of a compound is dissolved in enough water to form 100.0 mL of solution. This solution has an osmotic pressure of 2.56 atm at 25C. If each molecule of the solute dissociates into two particles (in this solvent), what is the molar mass of this solute?
February 2, 2014 by Me

One more Chem
One more A helium balloon has a volume of 2.30 L at 23.5 deg C and a pressure of 1.00 atm at sea level. the ballon is released and floats upward. At a certain height the atmospheric pressure is 0.810 atm and the temp is 12. C. What is the volume of the balloon? ????? ??? (P1V1...
July 17, 2007 by Jill

Chemistry
A 630. mL flask contains O2 at a pressure of 0.75 atm and a temperature of 20C. What mass of O2 is present? I know you Use PV = nRT and solve for n = number of mols gas. Then n = grams/molar mass and solve for grams. But I get the wrong answer
February 26, 2014 by Chelsey

chemistry
Assuming pressure and temperature remain constant, what happens to the volume of a gas if the number of moles of gas is increased (gas is added)? 1) Remains the same 2) Cannot be determined 3) Increases 4) Decreases
April 8, 2008 by aaloy

chemistry
Given: Ti=298K V=.005 L Pt=1 atm P H20 vapor= .0313atm P air= .9687 atm you increase the temperature to 338K; the total pressure remains 1 atm, but the volume increases. Determine the volume at the new temperature (assume water vapor reaches equilibrium at 338K) PLEASE help!! ...
July 5, 2012 by Kellie

Chemistry
A gas has a volume of 50.0 cm3 at a temperature of -73C. What volume would the gas occupy at a temperature of -123C if the pressure stays constant
June 12, 2011 by Richard

chemistry
A gas has a volume of 50.0 cm3 at a temperature of -73C. What volume would the gas occupy at a temperature of -123C if the pressure stays constant?
April 23, 2012 by devin

Physics HELP!!!!!!!!
Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a negligible mass. The area of the piston is 3.06 10-2 m2, and the pressure outside the cylinder is 1.02 105 Pa. Heat (2109 J) is ...
April 21, 2007 by Mary

chemsity
A 6.48-L cylinder contains 1.48 mol of gas A and 4.80 mol of gas B, at a temperature of 33.4 C. Calculate the partial pressure of each gas in the cylinder. Assume ideal gas behavior.
December 1, 2013 by dinah

AP Chemistry
What is the value of w (work) when 1.3 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in units of cal I know ...
January 6, 2015 by Ethan

chemistry
2. Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over water at 25 degrees Celsius and had a volume of 7.80L at 0.980 atm. How many grams of Zn were consumed in the reaction? (Vapor pressure of water ...
May 2, 2012 by preshi

CHE MISTRY
149ml bubble of hot gases at 217 degrees celcius and 1.78 atm escapes from an active volcano. What is the temperature, in celcuis, of the gas in the bubble outside the volcano if the new volume of the bubble is 164ml and the pressure is 0.770atm?
December 13, 2012 by Jen

physics (gas laws)
I have a packet of homework so I think I may post other questions that I'm stuck on later this weekend. So thats a heads up. This packet deals with Gas Laws. 1. Given 100 ml of dry gas measured at 37 C and 760 mmHg, what would be its volume at 60C? I used Charle's Law and ...
January 26, 2008 by abby

CHM 152
The freezing point of an aqueous solution of glucose was measured to be -1.52 oC. What is the osmotic pressure, in atm, of 100 mL of this solution at 25.0 oC? (Kf = 1.86 oC/m) When I calculated it out I got 16.79 atm but the answer was wrong dont know what I messed up on.
June 10, 2010 by Car

Chemistry
Consider the reaction 2H2O(g) --> 2H2(g) + O2(g) deltaH = +483.6 kJ/mol at a certain temperature. If the increase in volume is 32.7 L against an external pressure of 1.00 atm, calculate deltaU for the reaction. (1 L * atm = 101.3 J)
November 8, 2012 by Kim

Chemistry
Oxygen gas is commonly sold in 48.0L steel containers at a pressure of 130atm .What volume (in liters) would the gas occupy if its temperature was raised from 20.5∘C to 40.0∘C at constant 130atm ?
April 27, 2014 by Tyler

chemistry
What is the partial pressure of CO2 (torr)in exhaled breathe at 37 degree C. if the partial pressure of O2 is 116 (torr) and that of Nitrogen is 569 (torr). Assume atmospheric pressure is 1 atm. kindly help me with this problem
November 2, 2012 by Erin 12

chemistry
Water (H20) is a liquid at room temperature and atmospheric pressure whereas hydrogen sulfide (H2S) is a gas under the same conditions. Based on this information, what can you say about the intermolecular interactions in these two substances. So would this have to do with ...
September 16, 2012 by Travis

Thermodynamics
A 12 cu.ft tank contains hydrogen sulfide gas at 150psia & 80F after 5 pounds of the gas have been drawn out. Before any gas left the tank the temperature was 70F. What mass of gas was in the tank originally and what pressure? just to check: R=45.2 V=12cu.ft = 20736cu.in t=...
March 1, 2010 by Janus

chemistry
A sample of natural gas is 85.2% methane, CH4, and 14.8% ethane, C2H6, by mass. What is the density of this gas mixture at 18.0C and 771 mmHg? Assume ideal gas behavior.
October 31, 2012 by Zoe

Chemistry
Find temperature of 20.0g of nitrogen that occupies volume of 500.0ml at pressure 0.45 bar.
March 10, 2015 by Allison

Chemistry
I was given a question on an assignment and I can't figure it out. The question is A student collects 90ml of oxygen gas over water at 25c and a total pressure of 99.3kPa from the decomposition of KClO3. 2KClO3(s)-> 2KCl(s)+ 3O2 a) How many mols of O2 were collected? b)How ...
March 6, 2010 by Krissy

PHYSICS
A submarine is trapped at the bottom of the ocean with its hatch at a depth of 20 m below the surface. The hatch is circular and 0.40 m. Calculate the force that would have to be exerted against it to open it. The air inside the submarine has a pressure of 1 Atm. -I used P=f/a...
March 13, 2015 by Javeria

mentor high
What is the density of carbon dioxide gas if 0.196 g occupies a volume of 100 ml?
September 3, 2008 by nick

chemistry
I need to calculate the density, with work shown. 50.0 mg of a gas which occupies a volume of 0.0064 L ?
October 7, 2010 by alisha

chemistry
What is the molecular weight of an unknown gas if 2.5g of it occupies 2L at 630 torr and a temp. of 600K? 10.2 36.6 74.3 28.9 40.1
December 5, 2011 by Anonymous

Chemistry 1
if 0.500mol of argon gas occupies 2.10L at 735mmHg, what is the temperature if degrees Celsius
April 30, 2013 by Me

chemtry 1
If 0.500mol of argon gas occupies 2.35L at 725mmHg what is the temperature in degrees Celsius?
April 18, 2014 by shadow16

Chemistry
If a balloon filled with carbon dioxide has occupies a volume of 31 L at STP, what is the mass of the gas?
April 21, 2014 by Madison

chemistry
Hydrogen gas (7.0 mL) is mixed with chlorine gas(4.0 mL) at a certain pressure and temperature. A reaction between H2and Cl2 is initiated by UV light. If pressure and temperature are kept constant, which gases and in which volumes will be found after the reaction is completed?
April 17, 2015 by David

Chem
Calculate the work (in kJ) when 1.80 moles of methane react with excess oxygen at 389 K: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) I got 11661.26 Calculate the change in entropy (in J/K) when 70.1 g of nitrogen gas is heated at a constant pressure of 1.50 atm from 12.0 C to 63...
March 27, 2013 by Anonymous

intro to chemistry
A sample of nitrogen has a volume of 50.0L at a pressure of 760mmHg. What is the volume of the gas at each of the following pressures if there is no change in temperature? A. 1500mmHg B. 2.0atm C. 0.500atm
October 11, 2010 by david

Chemistry
A 10.00 g sample of He is compressed isothermally from a volume of 61.1 L to a volume 2.00 L at a temperature of 25 C. Calculate the work done by the gas on the surroundings if the external pressure is 101.325 kPa.
April 9, 2012 by sol

Chem
What is the molarity of a solution made by dissolving 4.14 g of sodium acetate in water and diluting to 750. mL? (molar mass NaC2H3O2 is 82.0 g/mol.) .67137, but that wasn't right. An open-ended mercury manometer is used to measure the pressure exerted by a trapped gas as ...
December 3, 2012 by Anonymous

science
A 2.747-g sample of manganese metal is reacted with excess HCl gas to produce 3.22 L of H2 at 373 K and 0.951 atm and manganese chloride compound (MnClx) what is the formula of manganese chloride compond produced in the reaction?
December 9, 2007 by heather

chemistry
A typical bathtub can hold 106 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 56 ◦F to 87 ◦F. Assume that the natural gas is pure methane (CH4) and that the products of combustion are ...
October 26, 2013 by maria

Chem
Argon makes up 0.93% by volumee of air. Calculate its solubility (mol/L) in water at 20C and 1.0 atm. Henry's law constant for Argon under these conditions is 1.5 x 10^-3 mol/L*atm.
March 26, 2010 by Staci

Chem 2
Argon makes up 0.93% by volume of air. Calculate its solubility (mol/L) in water at 20C and 1.0 atm. Henry's law constant for Argon under these conditions is 1.5 x 10^-3 mol/L*atm.
March 30, 2010 by Mike

college chem
At 750C, the Kp for the reaction 2 CO + O2➞ 2 CO2 is 2.72 x 10^11. ( 2.72 times ten to the eleventh) At that temperature, CO and O2 are added to a constant volume vessel. The initial pressure of the CO is 2.00 atm, and that of the O2 is 1.50 atm. Calculate the ...
February 26, 2010 by josh

Science-Biochemistry
What was the alcohol percent by weight in your sample with the most gas production (glucose; which gave 30 mL of CO2)? Remember that the temperature was 40 degrees C and assume the atmospheric pressure was 101.3 kPa.
April 13, 2010 by Angie

AP Chem
Use the following information to identify element A and compound B, then answer questions a and b. I'm so stuck on this problem and don't know where to begin. I need to have this problem done by Wednesday. PLEASE HELP!!! An empty glass container has a mass of 658.572 g. It has...
January 21, 2008 by John

chemistry
What is the density of propene gas measured at 2.5 atm and 47C? I know that I use the combine gas law, but I dont know how to find "n" in this particular problem. Please help ASAP!
November 30, 2011 by Henry

Chemistry
An oil whose density is 0.775g/mL was used in a open-end manometer to measure the pressure of a gas in a flask, as shown in figure (b). If the height of the oil column is 7.68cm and Pbar = 760.0mmHg. What is the pressure of the gas in the flask in mmHg?
November 18, 2011 by Chris

Need help asap**
The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 degrees celsius and a total pressure of 762 torr. What is the partial pressure of the oxygen gas? What formula do I need to use?
February 20, 2013 by Katie

chemistry
A 20.9 g sample of nitrogen gas combines completely with 4.5 g of hydrogen gas to form ammonia. What is the mass of ammonia formed? A 12.7 g sample of X combines with a 24.4 g sample of Y to form the compound XY2. What is the mass of the reactants?
September 15, 2013 by sasha

Physics Last Question HEEEELLLPPP !
#1 The internal energy of the gas in a gasoline engines cylinder decreases by 295 J. If 47.0 J of work is done by the gas, how much energy is transferred as heat? #2 If an ideal gas does work on its surroundings: a. The internal energy of the gas increases b. The volume of ...
December 12, 2010 by Jarrid

Chemistry
A tank contains 0.450 kg of oxygen(O2) compressed into a volume of 2.32 L. Estimate the gas pressure (in atm) inside the tank at 5 degrees celsius. Do I convert 0.450 kg from grams to moles, and if I do, do I use the molar mass of oxygen?
April 19, 2008 by Kate

chemistry
What volume of oxygen gas can be collected at 0.565 atm pressure and 48.0◦C when 42.9 g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆−−−−→2KCl(s) + 3O2(g) MnO2
February 25, 2015 by Anon

chemistry
What volume of oxygen gas can be collected at 1.26 atm pressure and 2.00◦C when 39.7 g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆/MnO2 −−−−→ 2 KCl(s) + 3 O2(g) Answer in units of L.
March 9, 2015 by Ally

chemistry
a gas sample heated in a cylinder uses 650kJ of heat. a piston that compresses this gas does 800kJ of work. What is the change in internal energy, ^E of the gas during this process?
February 12, 2013 by harry

Chemistry
A 3.23 gram sample of a sodium bicarbonate mixture was reacted with excess acid. 48.52 mL of the evolved gas was collected of the water at .930 atm. and 23.0 degrees C. What is the percentage of sodium bicarbonate in the original mixture?
April 23, 2011 by Adele

Chemistry
A 1.50mol sample of helium at a certain temperature and pressure has a volume of 31.4L. A second sample of helium at the same temp and pressure has a volume of 42.2L. How many moles of Helium are in the second sample?
March 3, 2011 by naseeb

HELP
A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole O2 , and an unknown quantity of He. The temperature of the mixture is 0 ∘C , and the total pressure is 1.00 atm . How many grams of helium are present in the gas mixture?
July 18, 2013 by Anonymous

Chemistry
I don't really know how to go about this, Please help 1. Calculate the number of moles of the gas. Calculate the volume the gas would occupy at 100.0 C and 15.0 atm. 10.8 g He 2. Given the volume of 54.0 C and 790 torr, calculate the number of moles and mass. 38.1 L CO
March 11, 2013 by Geoffrey

chemistry
A 40.4 g sample of a gas with the empirical formula C5H12 occupied a volume of 3070 mL with a pressure of 5016.0 torr at 168 C. Enter the molecular formula of the compound.
January 17, 2010 by Tasha

physical science
To what Celsius temperature must a gas sample initially at 20 degrees Celsius be heated if its volume is to double while the pressure remains the same?
May 7, 2012 by kristy

AP Chemistry !
Can you help me with this? If you can, do it as detail as you can. If not, you can just give me the answer, i'll try to figure how you did it :| A sample of gas in a cylinder of volume 3.96 L at 327 K and 3.28 atm expands to 7.34 L by two different pathways. Path A is an ...
October 5, 2010 by Nick

Chemistry
A 10.0 gram sample of a mixture of CH4 and C2H4 reacts with oxygen at 25C and 1 atm to product carbon dioxide gas and liquid water. If the reaction produces 520 kJ of heat, what is the mass percentage of CH4 in the mixture? PLEASE HELP! I do not know where to even start!
October 26, 2014 by Michelle

chemistry
The valve between a 5 liter tank in which the gas pressure is 911.925 kPa and a 10 liter tank containing gas at 4560 torr is turned open and equilibrium is established at constant temperature. What is the final pressure in the two tanks in atmospheres?
December 5, 2011 by laura

Chemistry
Two flasks containing the same inert gas are at the same temperature and pressure of 800. mm Hg. One flask is injected into each of the flasks to allow phase equilibrium to be established. No leakage occurs. If the pressure in the 1.0 L flask is 900 mm Hg, what is the pressure...
January 31, 2007 by Jason

chemistry
a sample of hydrogen occupies a volume of 950 mL at -15.3 degrees celcius. if the temperature increased to 30.0 degrees celcius, what would be the new volume?
December 8, 2011 by Colby

Chem
a 1.00 vessel at 0 degrees celcius contains 0.17 mols n2 1.0 mols h2 and 1.0 mols CH4 calculate the pressure of the gas mixture and the partial pressure of each constituent gas in the mixture. Ptotal= ? Pn2=? Ph2=? PCH4?
March 11, 2013 by Anonymous

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