Thursday
July 24, 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

science
An 0.804 mol sample of hydrogen gas at a temperature of 16.0 oC is found to occupy a volume of 29.2 liters. The pressure of this gas sample is mm Hg.
September 1, 2013 by Anonymous

science
An 0.804 mol sample of hydrogen gas at a temperature of 16.0 oC is found to occupy a volume of 29.2 liters. The pressure of this gas sample is mm Hg.
September 1, 2013 by Anonymous

chemistry
An 0.727 mol sample of argon gas at a temperature of 22.0 C is found to occupy a volume of 26.2 liters. The pressure of this gas sample is how many mm Hg?
May 5, 2014 by Sarah

chemistry
A sample of an ideal gas at 1.00 atm and a volume of 1.61 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 45.0 atm, what was the volume ...
April 6, 2012 by catey

chemistry
The solubility of nitrogen gas in water at 25 C and 1 atm is 6.8!10"4 mol/L. If the partial pressure of nitrogen gas in air above water is 0.76 atm, what is the concentration of dissolved nitrogen?
November 7, 2011 by Anonymous

Chemistry
A 5.0 L sample of gas at 1.0 atm and 25 degrees Celsius is compressed to 0.05 L and 5.0 atm. What is the temperature at this new set of conditions?
March 27, 2012 by Deana

college chem
A sample of methane gas CH4, occupies a volume (L) of 58.2 L at a pressure of 7.25 atm. What volume will the gas occupy if the pressure is lowered to 2.03 atm
April 29, 2014 by ashley

Chemistry
Use van der Waals equation to calculate the pressure exerted by 2.33 mol of ammo- nia at −3.7◦C in a 1.25 L container. The van der Waals constants for ammonia are a = 4.00 L2atm/mol2 and b = 0.0400 L/mol. (The values for a and b have been rounded off to simplify...
November 20, 2012 by Caitlin

Chemistry
EOC Problem 6.046 A mixture of gases contains 0.65 mol of N2, 0.70 mol of O2, and 0.90 mol of He. What is the partial pressure of each gas (in atm and in torr) in a 25.0 L cylinder at 340 K? What is total pressure?
February 26, 2014 by Amber b

Chemistry
The compound CH3F has van der Waals constants a = 5.009 atmL2 /mol 2 and b = 0.0562 L/mol. Using both the ideal gas law and van der Waalss equation, calculate the pressure expected for 25 mol of CH3F gas in a 5.00-L container at 75 C. no idea how to even start this one...
December 1, 2012 by Sarah

Chemistry
Find the volume, in L, of 100g gas mixture containing 10.0 mol% hydrogen in nitrogen at 30.0C and 5.00 atm. Use the avg molecular wt. what is the molar concentration of hydrogen, in mol/L, in the gas mixture? what is the average mass denisity in g/L
July 26, 2012 by Simon

chemistry
A 15.0L sample of argon has a pressure of 28.0 atm . What volume would this gas occupy at 9.90 atm? Assume ideal behavior.
July 29, 2013 by rena

chemistry
A tank contains a mixture of 3.0 mol of nitrogen 2.0 mol of oxygen and 1 mol of carbon dioxide at 25 degrees and a total pressure of 10 ATM calculate the partial pressure in torr of each gas?
January 19, 2012 by Lisa

Chemistry
At 122C the pressure of a sample of nitrogen gas is 0.830 atm. what will the temperature in Celsius be at 3.00 atm, assuming constant volume ?
March 20, 2013 by Ashley

Chemistry
A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface where the conditions are 22 C and 1.00 atm?
January 15, 2008 by Lauren

Chemistry
A sample of argon gas has a volume of 715 mL at a pressure of 1.34 atm and a temperature of 144 Celsius. What is the volume of the gas in milliliters when the pressure and temperature of the gas sample are changed to 622 mmHg and 321 K?
May 15, 2010 by Kelly

chemistry
a sample of helium gas has a volume of 6.50L at a pressure of 845mm Hg and a temperature of 25 celcius.what is the pressure of the gas in atm when the volume and temperature of the gas sample are changed to the following: a. 1850 mL and 325K
June 27, 2010 by Jetta

Chemistry
Apply the gas laws to determine how many grams of sodium azide (NaN3) are needed to fill the air bag of your vehicle to a volume of 79.0 L at 35.0 degrees celsius and 1.00 atm. The reaction occurring in the air bag can be repesented by the equation, 2NaN3 (s)-> 2Na (s) + 3 ...
December 9, 2011 by Dani

ap chemistry
1.95 mol of an ideal gas at 300 K and 3.00 atm expands from 16 L to 28 L and a final pressure of 1.20 atm in two steps: (1) the gas is cooled at constant volume until its pressure has fallen to 1.20 atm, and (2) it is heated and allowed to expand against a constant pressure of...
October 31, 2012 by cheri

chemistry
A 12 g sample of Ne is added to a container that also holds .78 mol of helium gas. What is the partial pressure of helium if the total pressure, after mixing is 2.43 atm?
March 1, 2013 by john

physics
1.7 mol of an ideal gas which starts at 1.6 atm and 50 o C does 2.0 kJ of work during an adiabatic expansion. What is the final volume of the gas?
November 18, 2010 by serena

chemistry
the molar mass of an unknown gas was measured by an effusion experiment. it took 63s for te gas to effuse. where as nitrogen gas took 48sec. what is the molar mass of the gas? 32g/mol 37g/mol 24g/mol 16g/mol 48g/mol
June 21, 2010 by Ellie

chemistry
What is the volume occupied by 0.118 mol of helium gas at a pressure of 0.97atm and a temperature of 32 degrees celius? R=0.0821 L atm/mol K
April 18, 2010 by Tracey

Chemistry
Each of the following processes is spontaneous as described. Which one will have ∆H approximately equal to zero? 1. precipitating 1 mol of AgBr(s) from a solution of Ag+(aq) and Br−(aq) 2. 1 L He(1 atm, 298 K) + 1 L Ar(1 atm, 298 K) → 2 L He/Ar mixture(1 atm...
March 1, 2012 by Mary

chemistry
A 1.00-L sample of dry air at 25 C contains 0.0319 mol N2, 0.00856 mol O2, ... The main components of dry air, by volume, are N2, 78.08%; O2, 20.95%; Ar, ... by volume, of the following main gaseous components: N2, 74.1%; O2, ... What is the partial pressure of each gas in ...
April 19, 2011 by Kate

chem
Can someone glance over my work and see if it looks right? I'm certain about it because my units seem to be a little odd. Chloroform, CHCl3, has a vapor pressure of 197 mmHg at 23. degrees C and 448 mmHg at 45 degrees C. Estimate the heat of vaporization. ln P2/P1= heat of vap...
March 16, 2007 by Chris

chemistry URGENT!
Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 25L, onto the floor. Since the boiling point of liquid nitrogen at 1atm is 77.4 K, all the nitrogen boils ...
October 24, 2010 by mia

chemistry
What is the number of moles of gas contained in a 3 L vessel at 300 K with a pressure of 1.50 atm? (Given: R = 0.08205 L∙atm/mol∙K)
July 14, 2011 by Anonymous

Chemistry
Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
January 30, 2014 by Bryan Josten

Chemistry
Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1, respectively) are assumed to be ...
January 31, 2014 by Bryan Josten

Chemistry
You have 1L of an ideal gas at 0 degree celsius and 10 atm pressure. You allow the gas to expand against a constant external pressure of 1 atm, while the temperature remains constant. Assuming, 101.3 J/liter-atm, find q,w,delta E, and delta H in Joules, A) if the expansion ...
November 25, 2011 by John

Chemistry
A sample weighing 3.064 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3 (molar mass = 101.96). When heat and a stream of H2 gas is applied to the sample, the Fe2O3 reacts to form metallic Fe and H2O(g). The Al2O3 does not react. If the sample residue weighs 2.407 g, ...
October 29, 2012 by Chris

chemistry
A 28.4 L sample of methane gas is heated from 35.0 C to 76.0 C. The initial pressure of the gas is 1.00 atm at 35.0 C. Assuming constant volume, what is the final pressure of the gas
November 20, 2011 by sandy

Chemistry
An unknown amount of gas occupies 30.0 L at 2.1 ATM and 298K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon?
April 10, 2013 by Jake

Chemistry
An unknown amount of gas occupies 30.0 L at 2.1 atm and 298K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon?
April 10, 2013 by Ryan

Chemistry
An unknown amount of gas occupies 30.0 L at 2.1 atm and 298K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon?
April 12, 2013 by Ryan

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
What pressure (in atmospheres) will be exerted by 1.3 moles of gas in a 13 litre flask at 22 degrees Celcius? (Gas constant (R) = 0.0821 L atm K^-1 mol^-1)
May 18, 2014 by Anonymous

Chemistry
A sample of hydrogen (2.02 g/mol) effuses through a porous container about 8.85 times faster than an unknown gas. Estimate the molar mass of the unknown gas. Answer in units of g/mol
November 20, 2012 by Caitlin

chem
The experiment described in the procedure was performed using a sample of Calcium with HCl(aq). The lab conditions were 25.00C, and 747.0 torr barometric pressure. 112.7 mg of Calcium (MM: 40.08 g/mol) was reacted with 25.00 mL of 1.25M HCl(aq). 71.560g of water was collected...
November 18, 2013 by Anonymous

chem plz help :(
A sample of helium gas occupies a 10 cubic meter container at STP (273 K, 1 atm). What will the approximate volume become when the pressure is 1.5 atm and the temperature is 32 oC?
May 3, 2013 by nene

chemistry
A sample of gas (1.9 mol) is in a flask at 21 C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new pressure is 795 mm Hg and the temperature is now 26 C. There are now __________ mol of gas in the flask.
June 10, 2014 by treasa

chem
A 5.00 liter sample of gas measured at 27.0*C and 1.25 atm presure has a mass of 10.13 g. What is the formula weight of the gas?
August 1, 2012 by liz

chemistry
a gas occupies 37.6 L at 2.00 atm pressure and 27C degrees. how many moles of gas are present in this sample
May 8, 2013 by barbra

chem
A 75.0 L stainless steel container was charged with 3.00 atm of hydrogen gas and 4.00 atm of oxygen gas. A spark ignited the mixture, producing water. What is the pressure in the tank at 25C? in atm What is the pressure in the tank at 125C? in atm
November 17, 2007 by mel

chem
A reaction yields 0.00704 mol of O2 gas. What volume will the gas occupy if it is collected at 16.0◦C and 0.767 atm pressure? Answer in units of mL
May 30, 2014 by reis

physics
A chemist is working with a 4.50 mol sample of an ideal gas. The internal energy of the sample is known to be 14,900 J. What is the average kinetic energy of each gas molecule?
March 14, 2014 by Anonymous

chem.
A sample of argon at 300. C and 50.0 atm pressure is cooled in the same container to a temperature of 0. C. What is the new pressure? 105 atm 45.5 atm 54.9 atm 23.8 atm 42.7 atm
September 29, 2009 by Anonymous

Chemistry
If a nitrogen gas sample occupies a volume of 2.55 L at 22.0 degrees Celsius and 0.860 atm, what is the mass of the N2 gas?
November 14, 2011 by Mallory

CHEMISTRY HELP ASAP
A 1.26 g sample of He gas has a pressure of 0.123 atm and a volume of 32.6 L. What is the temperature of the sample, in C?
December 19, 2012 by Linda

chemistry
a gas sample is collected at 16 degrees c and 0.982 atm. if the sample has a mass of 7.40 g and a volume of 3.96 l, find the volume of the gas at stp and the molar mass?
February 28, 2012 by jessica

chemistry
A sample of O2 gas is collected over water at 23C at a barometric pressure of 751 mmHg (vapor pressure of water at 23C is 21 mmHg). The partial pressure of O2 gas in the sample collected is: (a) 21 mmHg (b) 751 mm Hg (c) 0.96 atm; or (d) 1.02 atm The answer is (c). Not sure ...
November 2, 2011 by Holly

chemistry
The equilibrium constant (Kc) for the gas phase reaction 2 NH3 N2 + 3 H2 is 3.0 x 10-3 at some temperature. The reaction is started by placing a 0.040-mol sample of ammonia in an empty one-liter flask. When equilibrium is established how much N2 is present? 1. ) 0.019 mol 2...
October 25, 2009 by James

AP Chem
Can someone please check these problems? 34. You fill a balloon with helium gas to a volume of 2.68 L at 23 degrees C and 789 mmHg. Now you release the balloon. What would be the volume of helium if its pressure changes to 632 mmHg but the temperature is unchanged? 3.35 L 38. ...
November 12, 2008 by Anna

Chemistry
Magnesium burns in air to produce magnesium oxide MgO and magnesium nitride Mg3N2. Magnesium nitride reacts with water to give ammonia. What volume of ammonia gas at 24 degrees C and 753 mmHg will be produced from 4.56 g of magnesium nitride. P= 753 mmHg (1 atm/ 760mmHg)= .991...
October 23, 2007 by Lauren

chemistry
I have a problem that states: Find the pressure of a sample of carbon tetrachloride, CCl4 if 1.00 mol occupies 35.0L at 77.0 degress C (slightly above its normal boiling point). Assume that CCl4 obeys (a) the ideal gas law; (b) the van der Waals equation. The van der Waals ...
December 30, 2007 by Alicia

Chemistry
(Ideal Gas Law) Calculate the volume of a 0.25 mole sample of gas at 25.0 degreeC and a pressure of 1.50 atm (R= 0.0821)
March 19, 2013 by JOY

Chem 1000
A Cylinder is filled with 1.20 mol of He(g) at 25 C under ambient pressure of 0.966 atm. The gas in the cylinder is then heated with 1.430 KJ of heat, and the piston is raised by the expanding gas under the constant ambient pressure. Calculate the following after expansion. a...
October 16, 2010 by J Velji

College Chemistry
A Cylinder is filled with 1.20 mol of He(g) at 25 C under ambient pressure of 0.966 atm. The gas in the cylinder is then heated with 1.430 KJ of heat, and the piston is raised by the expanding gas under the constant ambient pressure. Calculate the following after expansion. a...
October 16, 2010 by J Velji

Physics
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant pressure until its ...
November 16, 2012 by Erika

physics
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant pressure until its ...
November 18, 2012 by chelsea

college
You transfer a sample of gas at 17 degrees celsius for a volume of 5.86 L and 1.10 atm to a container at 37 degrees celsius that has a pressure of 1.10 atm. what is the new volume of gas?
December 1, 2010 by dayton

Chemistry
A 120. mL sample of a gas is at a pressure of 1.50 atm. If the temperature remains constant, what will be its volume at 3.50 atm of pressure?
November 30, 2010 by Kiesha

Chemistry
A 120. mL sample of a gas is at a pressure of 1.50 atm. If the temperature remains constant, what will be its volume at 3.50 atm of pressure?
December 6, 2010 by Ivy

chemistry
Imagine that 25.0 of ice at -3.0C is placed in a container holding water vapor at temperature of 120.0C . After a certain amount of time, the container has expanded slightly, but holds only water vapor at 110.0C. what is the final volume of the container? you may assume the ...
December 5, 2011 by Fajer

chemistry
Imagine that 25.0 of ice at -3.0C is placed in a container holding water vapor at temperature of 120.0C . After a certain amount of time, the container has expanded slightly, but holds only water vapor at 110.0C. what is the final volume of the container? you may assume the ...
December 5, 2011 by Fajer

chemistry
A sample of gas occupies 29 L under a pressure of 1.3 atm. What would the resulting volume be if the pressure were increased to 3.9 atm if the temprature did not change?
April 15, 2008 by riya

chemistry
A sample of a gas occupies a volume of 1158 mL at 59C and 0.76 atm. What would be the new volume if temperature decreases to 40C and pressure increases to 1.40 atm?
November 17, 2010 by Chris

chemristy
A sample of gas occupies 18 L under a pressure of 1.3 atm. What would the resulting valume be if the pressure were increased to 3.9 atm if the temperature did not change?
November 22, 2010 by kevin bolton

Chem
At constant temperature, a sample of 3.0L of Argon gas at 2.0 atm is compressed until the new pressure is 3.524 atm. What is the new volume?
October 11, 2012 by Stacy

Chemistry
At constant temperature, a sample of 3.0L of Argon gas at 2.0 atm is compressed until the new pressure is 3.524 atm. What is the new volume?
October 13, 2012 by Stacy

Chemistry 3A
a sample of nitrogen gas, N2 occupies 3.0L at a pressure of 3.0 atm. what volume will it occupy when the pressure is changed to 0.50 atm and the temperature remains constant?
December 3, 2012 by Gurjot

physics
five mole of an ideal gas are kept at a constant temperature of 53 degree celcius while the pressure of the gas is increased from 1 atm to 3 atm calculate the work done by the gas
May 5, 2010 by bed

Chemistry
Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3). At 200 oC in a closed container, 1.1 atm of nitrogen gas is mixed with 2.1 atm of hydrogen gas in an otherwise empty container. At equilibrium, the total pressure is 2.2 atm. Calculate the partial pressure ...
May 3, 2012 by Jake

chemistry
Triple Point Clicker Challenge The Lewis structure for nitroglycerin is shown below. 1.00 mL of liquid nitroglycerin is placed in a sealed, reinforced, insulated steel box measuring 1.00 m on each side and filled with argon gas at 15.0 oC and 1.00 atm. The density of ...
November 10, 2008 by james

Chem
A sample of gas of mass 2.929 g occupies a volume of 426 mL at 0degree Cel and 1.00 atm pressure. What is the molecular weight of the gas? Thanks!
March 9, 2010 by Peter

Chem 101
A 5.00 liter sample of gas measured at 27 degrees Celcius and 1.25 atm of pressure has a mass of 10.13 grams. What is the molecular weight of the gas in u?
November 30, 2011 by Joni

Chemistry
A XX-g sample of methane, CH4, is mixed with YY atm of O2 (an excess) in a VV L combustion chamber at 125.0C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 125.0C. What is the final pressure in the combustion chamber assuming the ...
February 25, 2007 by Jack

chemisry
Use the ideal gas equation to answer this question. (Recall that R is .0821 L atm/K mol. ) What pressure is exerted by .35 moles of a gas at 23 0 C if it is held in a container with a volume of 2.3 liters?
March 30, 2012 by Anonymous

chemistry 1
From data below, calculate the total heat (J) needed to convert 0.757 mol of gaseous ethanol (C2H6O) at 151C and 1 atm to liquid ethanol at 25.0C and 1 atm. Boiling point at 1 atm 78.5C cgas 1.43 J/gC cliquid 2.45 J/gC ΔHvap 40.5 kJ/mol
September 27, 2011 by Madison

chemistry
From data below, calculate the total heat (J) needed to convert 0.172 mol of gaseous ethanol (C2H6O) at 451 C and 1 atm to liquid ethanol at 25.0 C and 1 atm. Boiling point at 1 atm 78.5C cgas 1.43 J/g C cliquid 2.45 J/g C ΔHvap 40.5 kJ/mol
November 10, 2011 by Celeste

Chemistry
Using the van der Waals equation, determine the pressure of 436.0g of SO2(g) in a 7.30-L vessel at 725k.? For SO2(g), a=6.865L^2atm/mol^2 and b=0.05679L/mol. (R=0.0821Latm/(Kmol))
March 5, 2012 by Cynthia

chem
A sample of nitrogen gas (N2) kept in a container of volume 13.3 L and at a temperature of 22.3C exerts a pressure of 1.1 atm. Calculate the number of grams of gas present.
October 16, 2010 by nicole

Chemistry
A sample of nitrogen gas (N2) kept in a container of volume 11.7 L and at a temperature of 23.3C exerts a pressure of 2.6 atm. Calculate the number of grams of gas present.
October 17, 2011 by Sven

IPC
synthetic diamonds can be manufactured at pressures of 60000 atm. if we took 2.00 liters of gas at 1.00 atm and compressed it to a pressure of 60000 atm, what would the volume of that gas be?
December 3, 2013 by Elizabeth

Chemistry II
The total volume of hydrogen gas needed to fill the Hidenbrug was 2.0e8 L at 1.0 atm and 25 degrees Celsius. How much heat was evolved when the Hidenburg exploded, assuming all the hydrogen reacted? 2.0e8 L H2/22.4 L H2 = 8.9e6 mol H2 For every 2 mol H2 used -572 kJ of energy ...
May 20, 2007 by Jayd

science
1. the molar mass of helium is 4.00 g/mol. calculate the volume of 1 mol of helium at STP (T = 273, P = 1 atm) what is the density of helium at STP? 2. the density of an ideal gas is 1.35 kg/m^3. if the temperature is Kelvin and the pressure are both doubled, find teh new ...
April 23, 2008 by billystar

Chemistry
Having some confusion with this question....I have the answers, just not able to reach them. A flask of volume 5L is evacuated and 43.8 g of solid N2O4 is introduced at 77K. The sample is then warmed to 298K during which the N2O4 vaporizes and some dissociates to form brown ...
April 24, 2010 by Val

College Chemistry
1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451C and 1 atm to liquid ethanol at 25.0C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5C cgas 1.43 J/gC cliquid 2.45 J/g...
January 22, 2011 by Arian

College Chemistry
1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451C and 1 atm to liquid ethanol at 25.0C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5C cgas 1.43 J/gC cliquid 2.45 J/g...
January 22, 2011 by Arian

College Chemistry
1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451C and 1 atm to liquid ethanol at 25.0C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5C cgas 1.43 J/gC cliquid 2.45 J/g...
January 23, 2011 by Arian

Chemistry;HELP
1. A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure? 2. The pressure exerted by a gas is 2.0 atm while it has a volume of 350 cm3...
August 21, 2013 by Unknown

CHEMISTRY!! D:
1. A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure? 2. The pressure exerted by a gas is 2.0 atm while it has a volume of 350 cm3...
September 3, 2013 by Unknown

Chemistry
Calculate the total pressure (in atm) of a mixture of 0.0300 mol of helium, He and 0.0200 mol of oxygen O2 in a 4.00 L flask at 20 degrees C. Assume the ideal gas behavior. Can someone help me start this out... Please
October 23, 2007 by Lauren

Chemistry
To increase the solubility of a gas at constant temperature from 1.20 g/L at 1.4atm to 2.3 g/L the pressure would have to be increased to ______ A. 0.37 atm B. 0.7 atm C. 1.37 atm D. 2.7 atm
May 4, 2010 by Kathie

AP Chemistry
Consider a 50.4 g sample of H2O(g) at 115C. What phase or phases are present when 156 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J/gC; liquid, 4.2 J/gC; steam, 2.0 J/gC, Hvap = 40.7 kJ/mol, Hfus = 6.02 kJ/mol. (Select all that apply...
November 28, 2008 by Robert

Chemistry
a sample of helium gas has a volume of 1.25L at -125celcius and 50.0atm. the gas is compressed at 50.0 atm to volume of 325ml. what is the final temperature of the helium gas in Celcius
April 8, 2013 by Mckee

HELLO I NEED HELP AND NOBODY EVER HELPS ME.
1. the molar mass of helium is 4.00 g/mol. calculate the volume of 1 mol of helium at STP (T = 273, P = 1 atm) what is the density of helium at STP? 2. the density of an ideal gas is 1.35 kg/m^3. if the temperature is Kelvin and the pressure are both doubled, find teh new ...
April 23, 2008 by billystar

colllege chemistry
for the haber process for the synthesis of ammonia: N2(g)+ 3H2(g)= 2NH3(g), what is ΔG (kJ/mol) at298 K for a reaction mixture that consists of 1.5 atm N2,3 atm H2 and 1.8 atm NH3? [ΔG f(NH3)= -16.66kJ/mol]
December 6, 2010 by ramona

Chemistry
A sample of air contains 78.8% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 35 degrees C and 1.00 atm?
July 14, 2010 by Katie

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