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July 28, 2014

Search: A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is __________ atm.

Number of results: 20,114

chem
A balloon filled with 22.3 mol helium has a volume of 500. L at 0.0C and 1.00 atm pressure. The temperature of the balloon is increased to 38.0C as it expands to a volume of 570. L, the pressure remaining constant. Calculate q, w, and E for the helium in the balloon. (The ...
November 26, 2007 by mel

chem
A balloon filled with 22.3 mol helium has a volume of 500. L at 0.0C and 1.00 atm pressure. The temperature of the balloon is increased to 38.0C as it expands to a volume of 570. L, the pressure remaining constant. Calculate q, w, and E for the helium in the balloon. (The ...
November 26, 2007 by mel

CHM
Calculate the molecular weight of a small protein if a 0.32 g sample dissolved in 161 mL of H2O has an osmotic pressure of 9.0 mmHg at 25 degree celcius. (R=0.0821 L X atm/K X mol)
January 13, 2013 by Robby

chemistry
Four identical 1.0-L flasks contain the gases He, Cl2, CH4, and NH3, each at 0C and 1 atm pressure. Which gas sample has the greatest number of molecules?
October 27, 2010 by Tasha

Chemistry
1.05 g of an unknown gas at 47 C and 1.05 atm is stored in a 2.25-L flask. Density of the gas= 0.47g/L What is the molar mass of the gas?
October 22, 2012 by Vid

chemistry
Hydrogen gas can produced by the reaction between metallic aluminum and aqueous hydrochloric acid 2Al+6HCl----2AlCl3+3H2 Hydrogen gas produced by this reaction is typically collected via water displacement, during which time the hydrogen gas becomes saturated with water vapor...
November 19, 2013 by shadow

Chemistry
3.15 g of an unknown gas at 53 C and 1.00 atm is stored in a 1.55-L flask. The gas has a density of 2.03 g/L. What is the molar mass of the gas?
November 10, 2011 by Harley

Chemistry
A sample of gas occupies 24.5 L at a pressure of 1.57 atm; what is the pressure if the volume is increased to 48.3 L?
January 9, 2013 by Kayla

Chemistry
You have two gas-filled balloons, one containing He and the other containing H2. The H2 balloon is twice the size of the He balloon. The pressure of gas in the H2 balloon is 1 atm, and that in the He balloon is 2 atm. The H2 balloon is outside in the snow (−5 C), and ...
March 30, 2007 by Luis

Chemistry
A sample of gas has a volume of 1.30 L at STP. What is the temperature in C if the volume is 13.0 L at 2.00 atm?
February 14, 2014 by Harry

chemistry
A sample of gas has a volume of 1.30 L at STP. What is the temperature in C if the volume is 13.0 L at 2.00 atm?
February 14, 2014 by judy

Physics
A metal tank with volume 3.10 L will burst if the pressure of the gas it contains exceeds 100 atm. (a) If 11.0 mol of an ideal gas is put into the tank at a temperature of 23.00C, to what temperature can the gas be warmed before the tank ruptures? You can ignore the thermal ...
February 25, 2010 by Baker

Chemistry
A sample of gas has a volume of 6.20 L at 23 degrees celsius at a pressure of 1.90 atm. What is its volume at STP?
April 9, 2014 by ASAP!!

Chem
I have a problem in which I'm solving for -w. My equation is this: -w= nRT ln V2/V1 However, I don't know the value of n, but I do know the values of P, V, and T. If I fill in (PV/RT) for n in the above equation, would I be using the energy R or the gas R? The R you use is the...
March 6, 2007 by Alyssa

chemistry
a 12.5 g sample of oxygen gas is added to a 25.og sample of nitrogen gas in a 25.0L'Container at 28 C. Calculate the partial pressure of each gas and the total pressure of he mixture. answer
January 9, 2013 by Anonymous

AP Chemistry
Small quantities of hydrogen gas can be prepared in the laboratory by the addition of aqueous hydrochloric acid to metallic zinc. Zn(s)+2HCl(aq) -> ZnCl2(aq)+ H2(g) Typically, the hydrogen gas is bubbled through water for collection and becomes saturated with water vapor. ...
November 3, 2010 by Anonymous

chemistry
A bearthing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 1.2 atm if PHe = 0.98 atm and PCO2 = 0.04 atm? a) 1.02 atm b) 0.12 atm c) 0.94 atm d) 0.18 atm
March 16, 2011 by Logan

chemistry university
In this experiment you will be placing solid CO2 into a 10 ml tube. The tubes are not completely gas-tight, but what if they were? What would be the pressure inside the tube in atm, after all the dry ice had vapourised, if 3.72 g of solid CO2 was originally added and the tube ...
April 30, 2013 by angela

chemistry
At 16C a sample of ammonia gas exerts a pressure of 11.7 atm. What is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature so the inital Temp=16 C initial Pressure. 11.7 final pressure-unknown temperature-same what next?
October 17, 2010 by april

chemistry
what is the volume of 4.4 moles of Cl2 at 285 kelvin and 0.87 atm. (R=0.0821 k*atm/mol*k)
June 15, 2011 by Tom

chem
When the valve between the 2.00-L bulb, in which the gas pressure is 2.00 atm, and the 3.00-L bulb, in which the gas pressure is 4.50 atm, is opened, what will be the final pressure in the two bulbs? Assume the temperature remains constan
October 17, 2011 by ana

chemistry
An ideal gas is allowed to expand isothermally from 2.00 L at 5.00 atm in two steps: a) against a constant external pressure of 3.00 atm, followed by b) against a constant external pressure of 2.00 atm. Calculate q and w. (101.33 J = 1 L atm)
November 14, 2012 by ace

chemistry
A sample of oxygen at 25 degrees C occupies 697 mL. If this sample later occupies 1062 mL at 55 degrees C and 1.3 atm, what was its original pressure? Answer in units of atm
April 23, 2012 by please help

Chemistry-Please help
If 1.00mol of argon is placed in a 0.500- container at 28.0 degree Celsius, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation)? For argon,a=1.345(L square. atm)/mol square and...
October 16, 2009 by Rose

Chemistry
A gas is at 31.3 atm pressure at 32 degrees C. The volume of the tank is 45.0L. What would the volume of the gas be if you allowed it to expand to a pressure of 55.3 atm?
October 29, 2012 by Los

ap chemistry
A sample of gas in a cylinder of volume 4.09 L at 289 K and 3.43 atm expands to 7.73 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work
October 31, 2012 by cheri

Chemistry
A sample of nitrogen gas occupies 1.55 L at 27oC and 1 atm pressure. What will the volume be at -100oC and the same pressure?
February 9, 2011 by Alyssa

chemistry
A sample of an ideal gas has a volume of 2.29 L at 2.90 102 K and 1.08 atm. Calculate the pressure when the volume is 1.57 L and the temperature is 302 K.
May 7, 2013 by Alexis

HELP
Calculate the change in energy when 665.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K So i used the formula change in energy = change in H - nRT 90.7-51.9-38.8 its wrong i ...
January 27, 2011 by Chemistry

Chemistry
10.0 mol of ammonia gas is injected into a 4.0 L container. At equilibrium 1.2 mol of nitrogen gas is found in the container. The number of moles of ammonia gas left in the container must be which of the following? N2(g) + 3H2(g) <=====> 2NH3(g) + 94 kJ a. 8.8 d. 6.4 b. ...
June 8, 2010 by Alicia

Chemistry
A sample of gas with a volume of 14.9 liters at 2.6 atmospheres pressure and a temperature of 25C is allowed to expand to a volume of 29.3 liters at a temperature of 15C. What is the final pressure (atm)atof the gas?
March 25, 2013 by Linzy

chemistry
6.0mol of ammonia gas is injected into a 3.0 mol L container. at equilibrium 1.5 mol of hydrogen gas is found in the container. the number of moles of ammonia gas left in the container must be which of the following?
May 5, 2012 by nicole

chemistry
ideal gas .450 mole initial pressure 16 atm and 290 K expands isothermally to a final pressure 1 atm. find work , if expansion is against a vacuum, a constant external pressure of 1 atm and reviersibly
February 1, 2009 by kat

Chemistry
If 150 mL of 1.73 M aqueous NaI and 235 g of Pb(NO3)2 are reacted stoichiometrically according to the balanced equation, how many grams of Pb(NO3)2 remain? Pb(NO3)2(aq) + 2NaI(aq) → PbI2(s) + 2NaNO3(aq) Molar Mass (g/mol) NaI 149.89 Pb(NO3)2 331.21 Density (g/mL) - Molar...
February 19, 2009 by Jake

Chem
Nitric acid can be prepared by bubbling dinitrogen pentoxide into water. N2O5(g) + H2O -> 2H+(aq) + 2NO3-(aq) a) How many moles of H+ are obtained when 1.50 L of N2O5 at 25 degrees C and 1.00 atm pressure is bubbled into water? b) The solution obtained in (a) after reaction...
January 1, 2007 by Dave

chemistry-please check my work
Determine the mass of carbon monoxide that is produced when 45.6 g of methane CH4 react with 73.2 g of oxygen gas, O2. The products are CO and H2O. Please check my work: CH4 + 3O2 ---> 2CO + 2H20 nCH4=2.84 mol nO2=4.58 mol Limiting Reactant: 1 mol CH4/2.84 mol CH4 = 3 mol ...
May 23, 2008 by Sarah H

Chem
Consider the reaction H2S(g) <==> H2(g) + 1/2S2(g) At 1065*C the partial pressure at equilibrium of hydrogen sulfied, hydrogen and sulfur are found to be .670 atm, .221 atm, and .110 atm, respectively. Find Kp and delta-G* for the reaction. Find delta-G for the reaction ...
April 16, 2007 by Jessica

chemistry
A sample of helium gas has a volume of 328 mL at 0.69 atm. What pressure is needed to reduce the volume at constant temperature to 32 mL?
February 23, 2014 by john

Chemistry
A sample of a gas has a volume of 250. mL at 2.10 atm and 227 oC. What volume will it have at standard temperature and pressure (STP)?
April 18, 2014 by Carrie Boom

chem/some1 check my work plz.
air bags actived when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. this causes NaN3 to decompose explosively according to the following reaction: 2NaN3(s)=2Na(s)+3N2(g) what mas of NaN3 must be reacted to inflate an air bag ...
November 16, 2010 by julia

Chemistry
A mixture of 1.39 g H2 and 1.60 g He is placed in a 1.00-L container at 27C. Calculate the partial pressure of each gas and the total pressure. PH2 = ? atm PHe = ? atm Ptotal = ? atm Please put answer so i can compare to my answer
April 5, 2013 by Rashid

Chemistry
At 25 degrees C and 1 atm gas pressure, the solubility of CO2(g) is 149 mg/100 g water. When air at 25 degrees C and 1 atm is in equilibrium with water, what is the concentration of dissolved CO2, in mg/100 g water? Air contains 0.037 mol % CO2(g). the answer should come out ...
February 18, 2013 by Jacqueline

Chemistry
I really don't get this. The calculations shown don't make sense. Demonstrate that work is not a state function by calculating the work involved in expanding a gas from an initial state of 1.00: and 10.0atm of pressure to (a) 10,0 L and 1.0 atm pressure. (b) 5.00L and 2.00 atm...
November 28, 2008 by Xi

science
1mole of liquid water at 25 c and 1 atm forms 1 mole of steam at 100 c and 1 atm. the molar heat capacity of water 373 k is 40.79kj/mol and the molar heat capacity of water is 75.3 J. assume ideal gas behavior for steam. Calculate delta U, delta H and delta S
March 29, 2013 by bob

Chemistry
If there are 2L of H2 gas at .625 atm, and 1L of N2 gas at .200 atm isolated in two flasks, what are the final partial pressures of each, and the total pressure, after the valve between the two flasks has been opened and the gases are allowed to mix? Is this simply a ratio ...
April 7, 2013 by Lily

chemistry
Nitric oxide reacts with bromine gas at elevated temperatures according to the equation, 2 NO(g) + Br2(g) = 2 NOBr(g) The experimental rate law is rate = k[NO][Br2]. In a certain reaction mixture the rate of formation of NOBr(g) was found to be 4.50 x 10-4 mol L-l s-l. What is...
February 17, 2012 by Emile

chemistry
The gas phase reaction between nitrogen gas and oxygen gas to give NO gas is an endothermic process since 180.8 kJ of heat energy is absorbed when 1 mol of nitrogen reacts with 1 mol of oxygen. In which direction will the equilibrium be shifted if the temperature is increased...
April 20, 2011 by Rebekah

CHEMISTRY
Consider a 58.4 g sample of H2O(g) at 125C. What phase or phases are present when -162 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J g-1 C-1; liquid, 4.2 J g-1 C-1; steam, 2.0 J g-1 C-1, ΔHvap = 40.7 kJ/mol, ΔHfus = 6.02 kJ/mol. (...
November 17, 2012 by Sarah

Chemistry
balloon is filled with 1.35 atm dimethyl ether gas and 5.25 atm of oxygen gas at 27 C degrees. They react: C2H6O (g) + 3O2 (g) --> 2CO2 (g) + 3H2O(g) The system is allowed to cool back down to 27 degrees Celsius following the reaction. assuming external pressure is still ...
November 14, 2012 by Anonymous

chem help
Initially a gas is at a pressure of 12 atm, a volume of 23 L, and a temperature of 200 K, and then the pressure is raised to 14 atm and the temperature to 300 K. What is the new volume of the gas? Round to the nearest tenth. Don't forget the units.
July 10, 2012 by xggdhrxf

chemistry help
An amount of 414.27 g of zinc sulfide (ZnS, MM=97.44 g/mol) reacts with 99.58 g of oxygen gas (O2, MM=31.999 g/mol) at a constant temperature of 298.0 K and constant pressure of 1.00 atm. The reaction: 2 ZnS(s) + 3 O2(g) --> 2 ZnO(s) + 2 SO2(g) dH = -818.58 kJ a) How much ...
October 21, 2012 by Tymee

chemistry help
An amount of 414.27 g of zinc sulfide (ZnS, MM=97.44 g/mol) reacts with 99.58 g of oxygen gas (O2, MM=31.999 g/mol) at a constant temperature of 298.0 K and constant pressure of 1.00 atm. The reaction: 2 ZnS(s) + 3 O2(g) --> 2 ZnO(s) + 2 SO2(g) dH = -818.58 kJ a) How much ...
October 21, 2012 by Tymee

Chem 151
The atmosphere in a sealed diving bell contained oxygen and helium. If the gas mixture has 0.200 atm of oxygen and a total pressure of 3.00 atm, calculate the mass of helium in 10.0 L of the gas mixture at 40 degrees Celsius.
March 21, 2013 by Double checking ans

Gas Laws and Energy
I have another question. I've tried it and i keep getting it wrong. The average kinetic energy of a 1.85-g sample of argon gas in a 3.00-L bulb is 1.28e-22 J/atom. What is the pressure of the gas? What is the root mean square velocity of the argon atoms under these conditions...
March 2, 2007 by Jay

Chemistry
Consider the cracking of gaseous ammonia at constant total pressure of 1 atm and constant temperature. Find the equilibrium gas composition at 400 degree C. Given: The Gibbs free energy for the cracking reaction 2NH3 = N2 + 3H2, DeltaGo ( delta G standard) =87,030-25.8TlnT 31...
March 29, 2012 by John

chem
A sample of hydrogen has a volume of 1100 mL when the temperature is -0.899999999999999 degC and the pressure is 0.888 atm. What will be the volume of the gas at STP?
March 28, 2008 by zach

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

chemistry
in the equation PV=nRT for gases what do each letter stands for? P is pressure (usually in atmospheres). V = volume in liters. n is number of mols R is the universial gas constant = 0.08206 liter*atm/mol*K T is termperature in Kelvin.
January 29, 2007 by claudia

Analytical chemistry
I did the next problem, i don't have the results for it and i just want to know if i calculated the mass for Fe2O3 the right? A sample is a mixture of iron oxides (Fe2O3 and FeOOH). It's known that at 200C this reaction occurs: 2FeOOH(s)-> Fe2O3(s) + H2O(g) A 0.2564g ...
September 7, 2013 by Gloria

chemistry
If 48.1 g of solid Al2S3 and 6.68 mL of liquid H2O are reacted stoichiometrically according to the balanced equation, how many grams of solid Al2S3 remain? Al2S3(s) + 6H2O(l) 2Al(OH)3(s) + 3H2S(g) Molar Mass (g/mol) Al2S3 150.16 H2O 18.015 H2O 0.9982 Molar Volume (L) 22.4 ...
June 2, 2010 by Judy

chem
If I initially have a gas at a pressure of 13.5 atm, a volume of 2300 mL, and a temperature of 200 K, and then I raise the pressure to 14 atm and increase the temperature to 300 K, what is the new volume of the gas? Report the answer in correct number of significant figures ...
June 23, 2013 by hw

chemistry
Container A holds 767 mL of ideal gas at 2.50 atm. Container B holds 144 mL of ideal gas at 4.70 atm. If the gases are allowed to mix together, what is the resulting pressure?
March 13, 2013 by marie darling

Chemistry
How many grams of gas are present in a sample that has a molar mass of 70 g/mol and occupies a 2 L container at 117 kPa and 35.1C?
May 13, 2013 by Dori

chemistry
What is the change in enthalpy for an isothermal, isentropic compression of an ideal gas from 2 atm to 12 atm?
October 23, 2013 by Carl

engineering
What is the change in enthalpy for an isothermal, isentropic compression of an ideal gas from 2 atm to 12 atm?
October 23, 2013 by Carl

P-Chem
A 0.85-g sample is dissolved in 0.150 kg of bromobenzene. Determine the molar mass of the solute if the solution boils at 429.0 K at 1 atm pressure. The normal boiling point of bromobenzene is 428.1 K and the ebullioscopic constant is 6.26 K kg mol-1. A 0.85-g sample is ...
October 12, 2006 by Michelle

(chem) this will make me or break me :(
1.If the pressure of the gas in a 2.31 L balloon is 0.120 atm and the volume increases to 7.14 L, what will be the final pressure of the air within the balloon? Round to the nearest hundredth. Don't forget the units. 2.At a pressure of 2 atm, hydrogen gas occupies a volume of ...
May 23, 2013 by ty

chemistry
1.44 liters of gas at 0.935 atm are compressed to 0.275 l. Find the new pressure in atm.
March 29, 2011 by mary ann

Physics
An ideal monatomic gas goes from p1 = 180 atm and V1 = 45 m3 to p2 and V2 through an adiabatic process. If p2 = 60 atm, what is V2?
February 3, 2014 by Riley

chem ! help its killing me to :/
1.If the pressure of the gas in a 2.31 L balloon is 0.120 atm and the volume increases to 7.14 L, what will be the final pressure of the air within the balloon? Round to the nearest hundredth. Don't forget the units. 2.At a pressure of 2 atm, hydrogen gas occupies a volume of ...
May 23, 2013 by john

Chemistry
For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction 2NO(g) + O2(g) --> 2NO2(g) the standard change in Gibbs free energy is ΔG = -69.0 kJ/mol. What is ΔG for this reaction at 298 K when the ...
March 23, 2014 by Janavi

Chemistry
Pantothenic acid id one of the B vitamins. A sample of pantothenic acid was found to produce 3.84 mL of nitrogen gas, N2 at 23 degrees celsius and 785 mmHg. What is the volume of the nitrogen gas (in liters) produced as 29 degrees celsius and 0.993 atm?
February 28, 2013 by Kirstyn

Chemistry
The following information is given for ethanol, C2H5OH, at 1atm: boiling point = 78.4oC Hvap(78.4oC) = 38.6 kJ/mol melting point = -115oC Hfus(-115oC) = 5.02 kJ/mol specific heat liquid = 2.46 J/goC At a pressure of 1 atm, what is H in kJ for the process of condensing a 40.8 g...
January 24, 2011 by Jordan

chemistry
Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas? 6.5 g/mol 11 g/mol 20 g/mol 41 g/mol
October 31, 2010 by smith

Chemistry
Calculate the partial pressure of monatomic hydrogen in hydrogen gas at 2000 K and 1 atm pressure. Given: (i) For ½ H2  H, Ho298=217,990 J; So298=49.35 J/K. (ii) Assume that the heat capacity of monatomic gas to be 3/2R (iii)The heat capacity of H2 assume to be 31 J...
March 31, 2012 by Plizzz help me

chemistry
what is the total pressure of a gas mixture that contains hydrogen at 0.45atm nitrogen at 0.25 atm and argon at 0.60 atm
September 29, 2008 by andrew

chemistry
ii) What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm
January 30, 2009 by candi

chemistry
What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm
September 25, 2009 by irma

chemistry
What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm
September 25, 2009 by irma

chemistry
What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm?
September 26, 2009 by Vernita Bickcom

chemistry
if 240ml of O2 gas increases pressure from 0.40 atm to 0.80 atm what is the new volume? show all work
May 16, 2012 by shane

Chem
What pressure (atm) is needed to confine an ideal gas to 68.0 L after it has expanded from 44.0 L and 2.3 atm at constant temperature?
November 1, 2012 by Lena

Science
What will be the new volume if 115 mL of He gas at 100C and 0.993 atm is cooled to 26C and the pressure is increased to 1.35 atm?
November 25, 2013 by Lauren

chem PLEASE HELP
A Nitrox II gas mixture for scuba diving contains oxygen gas at 50atm and nitrogen gas at 98atm . What is the total pressure, in atm, of the scuba gas mixture?
July 18, 2013 by Anonymous

Chemistry
An element, M, reacts with oxygen to give an oxide of formula M3O4. A sample of M of 257 mg is placed in a 500.0 mL vessel containing oxygen at 0.991 atm and 23.0C. After cooling the vessel back to the original temperature, the pressure was 0.813 atm. Calculate the molar mass...
February 2, 2008 by Student

Science: Chemistry
A sample of a gas at 0.73 atm occupies a volume of 245 mL. If the temperature remains constant, what will be the new pressure if the volume increases to 633 mL?
November 17, 2010 by Chris

chem/some1 check my work plz.
air bags actived when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. this causes NaN3 to decompose explosively according to the following reaction: 2NaN3(s)=2Na(s)+3N2(g) what mas of NaN3 must be reacted to inflate an air bag...
November 16, 2010 by julia

physics
A cylinder with a movable piston holds 2.75 mol of argon gas at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 121 kPa. Find (a) the final volume of the gas, (b) the work done by the gas, and (c) the heat added to...
October 31, 2011 by Matthias Schwartzkopf

Chemistry
A sample of gas occupies a volume of 63.1 mL. As it expands, it does 130.4 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas? I know that P= 1.03 ATM when converted. I think I'm supposed to use the equation w= -PdeltaV and ...
January 31, 2013 by Anonymous

Chemistry
a 1.00-mol sample of phosphorus pentachloride placed in 10.0-L reaction flask and allowed to come to equilibrium at 250 degrees celsius; PCL5(g) = PCL3(g) Cl2(g) if the amount of chlorine in the equilibrium mixture is0.470 mol, calculate (a) the equilibrium concentration of ...
October 19, 2011 by MIndy

Chemistry
Sorry still confused. Here's the problem: 0.249g of a diatomic element occupies a volume of 125mL at 120 degrees Celsius and 2.00 atm. This element IS? I used PV/RT =n so: 2.00 atm (.125L)/0.0821L*atm/mol*K (393K) = 11.96 then 0.249/11.96 =20.1 which is Neon. It isn't diatomic...
December 8, 2011 by Lisa

chemistry
At 0.00 degrees C a 1.00 L flask contains 5.00 x 10^-2 mol N2, 1.50 x 10^2 mg O2, and NH3 at a concentration of 5.00 x 10^18 molecules/mL. What is the partial pressure of each gas, and what is the total pressure in the flask at atm?
May 7, 2012 by lindsey

kim
a gaseous hydrocarbon reacts completely with oxygen gas to form carbon dioxide and water vapor. given the following data, determine (delta)HoF for hydrocarbon: (delta)Horxn=-2044.5kj/mol hydrocarbon (delta)HoF CO2= -393.5kj/mol (delta)HoF H2O = -242kj/mol denstity of CO2 and ...
April 20, 2008 by chemistry

Chemistry
Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm) 1.032 atm Using this data...
October 21, 2012 by Karina

chemistry please help
calculate the concentration of silver nitrate in mol/L M x V =0.2 average Vw in ml of 2.23 2.26 2.43 MxVw = Mwx20 Mw=? mol/L chloride in water sample = mmol/L? =?g/L chloride in sample =?ppm chloride in water sample
June 4, 2012 by lynda

Chemistry
The following information is given for ether, C2H5OC2H5, at 1atm: boiling point = 34.6oC Hvap(34.6oC) = 26.5 kJ/mol melting point = -116oC Hfus(-116oC) = 7.27 kJ/mol specific heat liquid = 2.32 J/goC At a pressure of 1 atm, what is H in kJ for the process of condensing a 33.7 ...
February 9, 2012 by Hannah

Physics
1.9 mol of gas at a temperature of -180 C fills a 3.4 L container. What is the gas pressure? Never been good at physics or mol stuff, how do you set it up?
August 12, 2011 by Catie

CHM
Given the initial concentrations of 0.10 atm NO2 and 0.10 atm N2O4 in a 1.0 L flask, what will be the equilibrium partial pressure of NO2? N2O4(g)=2NO2 Kp=0.660at319K Choose one answer. a. 0.10 atm b. 0.31 atm c. 0.045 atm d. 0.72 atm e. 0.19 atm
March 28, 2010 by AMI

chemistry
Whats total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm
February 1, 2009 by Anonymous

science
2. The pressure on 100 cm3 of gas increases from 1 atm to 2 atm while the temperature drops from 20oC to -10oC. What is the new volume?
September 25, 2012 by DAKOTA

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