Number of results: 33,422
Chemistry
Determine the molar mass of each of the following gases? A. 2.90 g of gas that occupies 0.500 L at 0 C and 1.00 atm (STP) B. 1.48 G of gas that occupies 2.00 L at 0 C and 760 mmHg (STP) C. 0.726g of a gas that occupies 855 mL at 1.20 atm at 18 C? D. 2.32 G of a gas that ...
Monday, July 19, 2010 at 2:52pm by amy
Chemistry
A gas occupies a volume of 40 ml at 734.8 mm and 22* C . The gas was collected over water and the water level inside the eudiometer is the same as that outside. What is the volume of dry gas at S.T.P?
Sunday, June 19, 2011 at 5:52pm by Noodle
chemistry
40% v/v means 40 mL EtOH/100 mL soln. For EtOH, 40 mL has a mass of 40 mL x 0.789 g/mL = ? grams. ?grams/molar mass EtOH = mols and mols/L = M. The volume is 100 mL which is 0.1 L. For %w/w you have the conversion of 40 mL EtOH to grams. We want g EtOH/100 g soln. I think you ...
Tuesday, March 13, 2012 at 12:39pm by DrBob222
chemistry
A sample of a gas occupies a volume of 1158 mL at 59ºC and 0.76 atm. What would be the new volume if temperature decreases to 40ºC and pressure increases to 1.40 atm?
Wednesday, November 17, 2010 at 4:45am by Chris
Chemistry
Consider the titration of 41.5 mL of 0.213 M HCl with 0.123 M KOH. Calculate the pH of the resulting solution after the following volumes of KOH have been added. (Assume that all solutions are at 25°C.) (a) 0.0 mL (b) 10.0 mL (c) 40.0 mL (d) 80.0 mL (e) 100.0 mL
Wednesday, March 13, 2013 at 2:55am by Margaret
chemistry II
If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis
Thursday, February 3, 2011 at 10:34am by kris
chemistry II
If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis
Thursday, February 3, 2011 at 10:34am by kris
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!
Tuesday, March 9, 2010 at 9:09am by Peter
chemistry
some oxygen occupies 500.0 ml when its temperature is 40.0 C . if you wished to decrease the volume by 100.0 ml, to what temperture celsius would you need to lower the gas? not sure how to set this up right..keep thinking i need to subtract 100.0 from 500.0 first,then set it ...
Wednesday, February 2, 2011 at 7:46am by Harley
Chemistry
A gas occupies a volume of 140 mL at 35 degrees celsius and 97 kPa. What is the volume of the gas at STP?
Monday, February 22, 2010 at 7:13pm by Bob
Chemistry
a sample of gas of unknown pressure occupies 0.766 L at the temperture of 298k the same sample of gas is than tested under known conditions and has the pressure of 32.6kPa and occupies 0.664 L at 303 k. What is the original pressure of gas
Wednesday, July 13, 2011 at 11:53pm by Rocky
Chemistry
Determine the atomic weight of X in the following compounds a)8g XH4 occupy 44.8L volume at 237C and 380 mmHg pressure b)1.92g of X3 occupis a volume of 574 ml at 77C and 2 atm c)A O.326 gram of gas,C3X4 has a volume of 250 ml at100C and 76 cmHg d)A 3.12 gram of the gaS.HX,...
Sunday, March 11, 2012 at 12:41pm by faisal
chemistry
A sample of unknown gas weighs 2.96 g and occupies 750. mL at 760. mmHg and 100.°C. What is the molar mass of the unknown gas?
Tuesday, March 20, 2012 at 12:48pm by bobby
chemistry
A sample of argon gas occupies a volume of 950 mL at 25.0°C. What volume will the gas occupy at 50.0°C if the pressure remains constant?
Saturday, June 12, 2010 at 10:38pm by lara
chemistry
If 0.385 g of gas occupies a volume of 200 mL at -73 oC and 750 torr, what is the molecular mass of the gas? a) 21.4 b) 32.0 c) 44.0 d) 48.0 Someone can help me this answer please..?
Sunday, April 18, 2010 at 11:35pm by Susie
chemistry
A sample of gas with a mass of 1.62 g occupies a volume of 941 mL at a pressure of 748 torr and a temperature of 20.0 C. What is the molar mass of the gas?
Thursday, July 26, 2012 at 7:56am by kris
Chemistry
A gas occupies a volume of 140 mL at 35 degrees celcius and 97 kPa. What is the volume of the gas at STP? Please show the work.
Tuesday, February 23, 2010 at 7:44pm by Maria
chemistry
if 48.3 g of an unknown gas occupies 10.0 L at 40 degrees celsius and 3.10 atm, what is the molar mass of the gas?
Friday, April 20, 2012 at 1:00pm by sherly
chemistry
If 48.3 g of an unknown gas occupies 10.0 L at 40 degrees celsius and 3.10 atm, what is the molar mass of the gas?
Friday, April 13, 2012 at 11:17pm by cheryl
chemistry 1B
A sample of gas occupies a volume of 61.2 mL. As it expands, it does 133.9 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas.
Friday, February 1, 2013 at 8:53pm by Anonymous
Chemistry
A sample of Argon gas at standard pressure occupies 1000 mL. At constant temperature, what volume does the gas occupy if the pressure increases to 800 mm Hg?
Sunday, November 13, 2011 at 9:10pm by Jessie
CHEMISTRY
The definition of the molar mass of an ideal gas is that mass of gas that occupies 22.4 L at STP. You know the mass that occupies 0.500 L. So if 0.5 L has a mass of 0.0750 g, then 1 L would weigh what? If that mass occupies 1 L, then how much mass would occupy 22.4 L?
Thursday, March 6, 2008 at 8:10pm by DrBob222
homework college chem.
a sample of gas occupies a volume at 73. 1 mL. As it expands, it does 135.0 J of work on its surroundings at a constant pressure of 783 torr. what is the final volume of gas?
Sunday, February 26, 2012 at 12:58am by danielle
ap chemistry
A sample of gas occupies 4 mL at STP. At what pressure would this sample occupy 500 mL if the temperature is changed to 525C? Answer in units of torr
Saturday, February 9, 2013 at 7:32pm by cheri
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?
Wednesday, November 17, 2010 at 4:43am by Chris
Chemistry
What is the pressure of the gas if 0.145 mol occupies 227 mL at 35°C?
Wednesday, October 27, 2010 at 11:13pm by Meaghan
chemistry
A sample of argon gas occupies a volume of 950 mL at 25.0C. What volume will the gas occupy at 50.0C if the pressure remains constant?
Tuesday, March 16, 2010 at 10:31pm by catherine
chemistry
if 3.21 mol of a gas occupies 56.2 liters at 44 degrees celcius and 793 torr, 5.29 mol of this gas occupies how many liters under these conditions?
Wednesday, January 20, 2010 at 2:33pm by Anonymous
CHEM!!
In an experiment 5.57 +/- 0.02 grams of water chemically decomposes into the products hydrogen gas and oxygen gas. The measured mass of oxygen gas produced in the reaction is 4.9320 +/- 0.0001 grams. The hydrogen gas occupies a volume of 6902 mL. Report the density of the ...
Thursday, February 7, 2008 at 11:39pm by HELP!!
mentor high
What is the density of carbon dioxide gas if 0.196 g occupies a volume of 100 ml?
Wednesday, September 3, 2008 at 7:54pm by nick
Chemistry
If 0.823g of an unknown gas occupies a volume of 702.0 mL at 38.9 deg. Celsius, and 726.2 mm Hg pressure, what is the molar mass of the gas? (pressure has already been corrected for water vapor pressure)
Sunday, April 17, 2011 at 1:52pm by Carla
Chem help?
In an experiment 5.57 +/- 0.02 grams of water chemically decomposes into the products hydrogen gas and oxygen gas. The measured mass of oxygen gas produced in the reaction is 4.9320 +/- 0.0001 grams. The hydrogen gas occupies a volume of 6902 mL. Report the density of the ...
Thursday, February 7, 2008 at 11:10pm by sool
Chemistry
If a sample of gas occupies 2.1 ml at a pressure of 896 torr, what volume (ml) will it occupy at a pressure of 316.8 torr. I really need an answer, but also please show me how to work this problem.
Monday, March 25, 2013 at 2:31pm by Linzy
Chemistry
what is the absolute temperature of the gas at which 3.33 10-3 mol occupies 440. mL at 708 torr
Thursday, September 13, 2012 at 7:38pm by Jalynn
chemistry
2H2O2 --> 2H2O +O2 If a 250mL bottle of hydrogen peroxide solution containing 3% H2O (by mass) completely decomposed how many liters of gas would it generate. Assume that one mole of gas occupies a volume of 22.4 L and that the density of the solution is 1 g/mL.
Tuesday, October 6, 2009 at 9:07pm by Anonymous
ChemistryI
If an ideal gas occupies 736 ml at 45C and 719 torr, what volume will it occupyat 105Cand 972torr?
Friday, April 20, 2012 at 11:27am by cc
Chemistry
I have no idea how to do this problems can somebody help me: 1.How many mL of and oxygen gas can be produced form the termal decmpositon of 0.340 g of hydrogen peroxide at 700°C and 755 mm Hg? 401 mL 803 mL 1200 mL 1610 mL 2.How many mL of oxygen gas at 25.0°C and 755 ...
Saturday, April 21, 2007 at 10:49am by Ryan
Gas Law Chemistry
I need help on these two questions: If a certain gas occupies a volume of 16L when the applied pressure is 8.0atm , find the pressure when the gas occupies a volume of 4.0L . A certain gas is present in a 12.0L cylinder at 4.0atm pressure. If the pressure is increased to 8....
Thursday, October 25, 2012 at 4:56pm by Amy
jordan high
A sample of a gas at 0.63 atm occupies a volume of 324 mL. If the temperature remains constant, what will be the new pressure if the volume increases to 124 mL? new pressure=_____atm
Sunday, April 10, 2011 at 12:00am by Anonymous
Chemistry
You want to use about 40 mL of the titrant which is 1 mg/mL. That means 1 mg/mL x 40 mL = about 40 mg sample. To get 40 mg of the sample, which is 600 mg/L (600 mg/1000 mL = 0.600 mg/mL) means 0.600 mg/mL x ?mL = 40 mg and solve for mL. I get about 66.7 mL. That isn't ...
Wednesday, November 30, 2011 at 5:10pm by DrBob222
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
Monday, April 23, 2012 at 7:07pm by please help
Chemistry
Write and balance the equation. Convert 179 mL H2 gas @ STP to mols remembering that 1 mol of a gas occupies 22,400 mL at STP. Using the coefficients in the balanced equation, convert mols H2 to mols Na. Then convert mols Na to grams. g = mols x atomic mass.
Tuesday, January 29, 2013 at 1:05am by DrBob222
Chemistry
A quantity of gas weighing 7.10g at 741 torr and 44 degrees C occupies a volume of 5.40 L. What is its molar mass?
Friday, July 8, 2011 at 6:58pm by Sade
chemestry
A gas is contained in a metal cylinder with a piston, so that the volume of the cylinder can change. If the gas initially occupies volume of 664 ml at 471 mmHg, what will be the volume if the temperature is kept constant and the pressure is changed to 408 mmHg?
Tuesday, May 17, 2011 at 7:28pm by jo
chemistry
A sample of gas occupies 17 mL at -112C. What volume does the sample occupy at 70C?
Tuesday, July 29, 2008 at 1:06pm by natasha
Chemistry
A sample of gas collected over water at 42 C occupies a volume of one liter. The wet gas has a pressure of 0.986 atm. The gas is dried, and the dry gas occupies 1.04 L with a pressure of 1.00 atm at 90 C. Using this information, calculate the vapor pressure of water at 42 C. ...
Thursday, October 14, 2010 at 9:35pm by Bree
ap chemistry
Suppose that a sample of gas occupies 117 mL of volume at 25C and a pressure of 289 torr. What would be the volume if the pressure were changed to 490 torr at 25C? Answer in units of mL
Saturday, February 9, 2013 at 7:10pm by cheri
General Chemistry I
A sample of gas occupies a volume of 59.9 mL. As it expands, it does 126.2 J of work on its surroundings at a constant pressure of 798 torr. What is the final volume of the gas? a. 61.1 mL b. 1,250 mL c. 218 mL d. 1,490 mL e. None of the above I used the work function w = -P&...
Monday, December 3, 2012 at 11:53pm by Emily
chemistry
A given mass of gas occupies a volume of 449 mL at 25°C and 740 mmHg. What will be the new volume at STP?
Thursday, October 28, 2010 at 1:14am by kelly
Chemistry
If 3.21 mol of a gas occupies 56.2 L at 44*C and 793 torr, 5.29 mol of this gas occupies __________ L under these conditions. . -How will I solve this using PV= nRT? I tried using PV= nRT. By just plugging in the value and got 131 but the answer is around 92.6. Thanks
Monday, April 1, 2013 at 8:11pm by Shadow
chemistry
Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3
Thursday, January 19, 2012 at 3:56pm by Anonymous
chemistry
Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3
Thursday, January 19, 2012 at 3:56pm by Anonymous
chemistry
Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3
Thursday, January 19, 2012 at 3:56pm by Anonymous
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
Monday, December 5, 2011 at 2:41pm by Anonymous
chemistry
Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? a. 45.0 mL O3 b. 35.0 mL N2 c. 15.0 mL of CO2 d. 25.0 mL of SO with the little 3 at the bottom.
Friday, January 20, 2012 at 1:46pm by Anonymous
chemistry
A sample of N2 gas occupies a volume 180 mL at STP. What volume, in L, will it occupy at 640 mm Hg and 295 K?
Thursday, March 29, 2012 at 11:13pm by marie
chemistry
A gas occupies 255 mL at 479.6 Torr and 21.0 °C. When the pressure is changed to 558.6 Torr, what temperature is needed to maintain the same volume?
Tuesday, May 17, 2011 at 7:25pm by Amy
Chemistry
What volume of 0.123 M AgNO3(aq) is needed to form 0.657 g of AgCl(s)? 0.564 mL. 18.6 mL. 37.2 mL. 1.77 L.
Saturday, June 12, 2010 at 5:55pm by Kelly
Chemistry(URGENT, PLEASE HELP!)
the volume of alcohol present in 620 mL of a 40% (v/v) solution of alcohol is ______? A. 372 mL B. 40 mL C. 248 mL D. 580 mL
Tuesday, May 4, 2010 at 5:16pm by Kathie
Help with decimals
I need to round 8.1234 to the nearest thousandths, would that be: 8.123 or 8.124 8.123 8.123 I agree with Holly, it would be 8.123
Saturday, February 24, 2007 at 1:31pm by Breanna
chemistry quick homework help
A gas occupies 359 mL at 501.4 Torr and 24.1 °C. When the pressure is changed to 441.8 Torr, what temperature is needed to maintain the same volume?
Monday, April 15, 2013 at 9:25am by will.i.am
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?
Friday, April 12, 2013 at 1:15am 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?
Wednesday, April 10, 2013 at 11:08pm 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?
Wednesday, April 10, 2013 at 1:50am by Jake
chemistry
Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? Answer 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3 how would i go about answering this question.
Saturday, January 19, 2013 at 1:26am by jakey
Chemistry
A gas occupies 275 ml at 0°C and 610 Torr. What final temperature would be required to increase the pressure to 760 Torr, the volume being held constant?
Thursday, May 2, 2013 at 12:24am by Chad
chemistry
a sample of gas occupies 1910ml at -22.8 degrees C and 740 torr. what volume would it occupy at the same pressure and 285 degrees C? answer units in ml
Wednesday, August 31, 2011 at 4:57pm by Taylor
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 ...
Thursday, January 31, 2013 at 1:47am by Anonymous
Math
You're kidding. 120 ml - 80 ml = 40 ml Volume of the rock is 40 ml....
Thursday, September 29, 2011 at 6:08pm by Huurdurrdedooba
Chemistry
A gas at a temperature of 95 degrees C occupies a volume of 159 mL. Assuming constant pressure, determine the volume at 15 degrees C.
Tuesday, August 2, 2011 at 5:04pm by Tina
chemistry
a sample of carbon dioxide gas occupies 3.5 L at 25degrees C. At what temperature will the gas volume be 1 L?
Saturday, May 8, 2010 at 10:49pm by Cris
chem
A 0.0097561 g quantity of an unknown gas occupies 0.2 L at 500 K and 2 atm. What is the Molecular Weight (MW) of the gas ?
Monday, December 5, 2011 at 9:29pm by laura
chem
A 0.0097561 g quantity of an unknown gas occupies 0.2 L at 500 K and 2 atm. What is the Molecular Weight (MW) of the gas ?
Monday, December 5, 2011 at 6:52pm by laura
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
Wednesday, May 8, 2013 at 9:40pm by barbra
Chemistry 3A
a sample of gas occupies 500ml at STP. what volume will the gas occupy at 85.0 degrees Celsius
Tuesday, December 4, 2012 at 11:59am by Gurjot
chem
A sample of hydrogen gas occupies 16.8 L at STP. How many moles of the gas are present? Answer in units of mol
Thursday, April 19, 2012 at 12:00am by luke
chem
where did you get m? [(NH3)(H3O^+)/(NH4^+)] = Kw/kb (y*y/0.123-y)= 1 x 10^-14/1.8 x 10^-5 I don't know your book value for Kb for NH3 but I'm using 1.8 x 10^-5. Then operate on the right side only to get 1 x 10^-14/1.8 x 10^-5 = 5.56 x 10^-10, then [y^2/(0.123-y)] = 5....
Monday, February 16, 2009 at 8:42pm by DrBob222
Chemistry
nitrogen gas is at 2.00. c, 2.00 atm pressure and occupies a volume of 10.01. Assume nitrogen is an ideal gas, how many moles of the gas are present?
Sunday, November 4, 2012 at 11:48am by Tomi
Chemistry
Container A holds 752 mL of ideal gas at 2.40 atm. Container B holds 179 mL of ideal gas at 4.80 atm. If the gases are allowed to mix together, what is the resulting pressure? Note: Find the partial pressure of each gas in the total volume using a formula that relates volume ...
Sunday, October 28, 2012 at 4:46pm by Garcia
Physics
0.75 mol of argon gas is admitted to an evacuated 40 cm^{3} container at 40 C. The gas then undergoes an isochoric heating to a temperature of 500 C. What is the final pressure of the gas?(answer in kPa)
Thursday, December 10, 2009 at 7:43pm by Ana
chemistry
If 2.25g of a gas occupies 1750mL at 180 degrees Celsius and 550mm Hg of pressure, what is the molecular weight of the gas?
Wednesday, February 6, 2013 at 2:14pm by rv
chemistry
If 0.385 g of a gas occupies a volume of 200mL at minus 73 degrees C and 750 torr, what is the molecular mass of the gas?
Sunday, November 4, 2007 at 3:47pm by Lucy
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?
Monday, November 14, 2011 at 11:50pm by Mallory
Chemistry
If 0.896g of a gas occupies a 250mL flask at 20 degree celcius and 760 mmHg of pressure, what is the molar mass of the gas?
Friday, August 6, 2010 at 7:53am by TangenT
Physics
This is not a trivial question. At those temperatures, the ideal gas law does not apply. Additionally, there are intermolecular forces that "compress" the volume. Here is an estimate. The density of liquid helium is about .125g/ml, so 70 grams occupies about ....
Friday, February 24, 2012 at 4:36pm by bobpursley
Chemistry
A 0.02847 g sample of gas occupies 10.0-mL at 292.0 K and 1.10 atm. Upon further analysis, the compound is found to be 38.734% C and 61.266% F. What is the MOLECULAR formula of the compound?
Monday, July 2, 2012 at 2:31am by arcos15
physics
An ideal gas with r(Gama) = 1.5 occupies a volume of 2.0 L. The gas expands isothermally to a volume of 3.0 L. Alternatively, the gas reaches the same final state by first adiabatically expanding to the final volume then heating isochorically to the final temperature. For ...
Friday, May 18, 2012 at 6:52am by sand
physics
An ideal gas with r(Gama) = 1.5 occupies a volume of 2.0 L. The gas expands isothermally to a volume of 3.0 L. Alternatively, the gas reaches the same final state by first adiabatically expanding to the final volume then heating isochorically to the final temperature. For ...
Thursday, May 17, 2012 at 11:25am by sand
physics
An ideal gas with r(Gama) = 1.5 occupies a volume of 2.0 L. The gas expands isothermally to a volume of 3.0 L. Alternatively, the gas reaches the same final state by first adiabatically expanding to the final volume then heating isochorically to the final temperature. For ...
Wednesday, May 16, 2012 at 9:48pm by sand
General Chemistry
If a 14.05g sample of a gas occupies 10.0L at STP, what is the molar mass of the gas at 125 degrees Celsius?
Wednesday, June 20, 2012 at 12:50pm by Kim
Chemistry
A 0.02847 g sample of gas occupies 10.0-mL at 292.0 K and 1.10 atm. Upon further analysis, the compound is found to be 38.734% C and 61.266% F. What is the molecular formula of the compound? __________________?
Monday, July 2, 2012 at 2:28am by arcos15
Chemistry
40% means 40 g acetic acid/100 g soln. The density is 1.049; therefore, the volume of 100 g soln is 100/1.049 = 95.328 mL. You want 120 mL of the solution; therefore, 40 x (120 mL/95.328 mL) = ?? g in 120 mL. To check you answer, convert 120 mL to grams and divide (??g/g)*100 ...
Sunday, October 10, 2010 at 10:37pm by DrBob222
chemistry
If 0.45 mol of neon gas occupies a volume of 789 mL at a certain temperature and pressure, what volume would 0.376 mols of neon occupy under the same conditions? what Law is used to solve?
Wednesday, April 18, 2012 at 11:13am by Anonymous
Chemistry
A sample of Kr gas has a volume of 465 mL at 286°C and 844 torr. When the gas is cooled by 38.3°C, its volume is reduced by 0.572 mL. What is the final pressure of the gas in kPa? the answer is supposed to be 105 but i keep getting 49.9!!!!!!
Saturday, January 19, 2008 at 5:22pm by Matt
Chemistry
An unknown gaseous hydrocarbon consists of 85.63% carbon by mass. A 0.335 g sample of the gas occupies a volume of 0.107 L at STP. What is the identity of the gas?
Wednesday, November 14, 2012 at 6:16pm by Sarah
math
Alternatively: N = .123 1000N = 123 N = 123/1000
Wednesday, May 21, 2008 at 9:19pm by tchrwill
chemistry
A gas occupies 10 liters at a pressure of 40.0 mm hg. What is the volume when the pressure is increased to 60.0 mm hg
Tuesday, March 20, 2012 at 5:04pm by jr
Chemistry
A compound containing only C, H, and N yields the following data. (i) Complete combustion of 34.8 mg of the compound produced 33.3 mg of CO2 and 40.9 mg of H2O. (ii) A 66.3-mg sample of the compound was analyzed for nitrogen by the Dumas method, giving 36.2 mL of N2 at 740. ...
Tuesday, November 20, 2012 at 12:27am by Darrel
College Chemistry
Suppose you take 2 mL of boiling A. X = 2 mL x 200 mg/mL = 400 mg so all of X will dissolve. Y = 2 mL x 200 mg/mL = 400 mg so all of Y will dissolve. Now cool the solution to room temperature. How much X and Y will recrystallize? 2 mL x 20 mg/mL = 40 mg X will stay in solution...
Monday, January 21, 2013 at 11:49pm by DrBob222
chemistry
A sample of argon of mass 10.4 g occupies 2100 ml at 30 oC . (i) Calculate the work done by the gas when it expands isothermally against a constant external pressure of 31.1kPa until its volume has increased by 483.1ml. (ii) Calculate the work done by the gas if the same ...
Wednesday, January 11, 2012 at 3:28am by sand
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