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April 28, 2016

Search: gas

Number of results: 8,759

Chemistry
A student performed an experiment to determine the molecular weight of a gaseous compound. Using the ideal gas law PV = nRT, and knowing the pressure, temperature, and volume of the vapor, the student calculated the number of moles of gas, n, to be 0.0443 mol. The weight of ...
November 15, 2015 by Ericka

chemistry
LP gas burns according to the exothermic reaction: C3H8(g) + 5 O2(g) right arrow 3 CO2(g) + 4 H2O(g) ΔHrxn = −2044 kJ What mass of LP gas is necessary to heat 1.2 L of water from room temperature (25.0C) to boiling (100.0C)? Assume that during heating, 18% of ...
March 30, 2013 by Dr. Phil

science
Describe the particle motion in gas. http://en.wikipedia.org/wiki/Gas
January 23, 2007 by Ryan

QSO 51O
The Newox Company is considering whether or not to drill for natural gas on its own land. If they drill, their initial expenditure will be $40,000 for drilling costs. If they strike gas, they must spend an additional $30,000 to cap the well and provide the necessary hardware ...
March 6, 2013 by Anonymous

Chemistry
At STP potassium chlorate (KClO3) decomposes to produce solid potassium chloride (KCL) and oxygen gas (O2) according to the balanced chemical equation: 2KClO3(s)->2KCl(s)+3O2(g) What volume of oxygen gas, measured at 40 degrees celsius and 85.4 kPa, will be produced when 13...
April 11, 2016 by Abby

Chem
Which of the following are correct statements? (Could be as many as 4) 1. One mole of gas contains 22.4 representative particles 2. Standard pressure is 100 mm Hg 3. One mole of a gas must have the same volume as one mole of any other gas at STP 4. Gas molecules are spaced far...
April 10, 2013 by will.i.am

chemistry
use the molar volume of a gas to solve the following at STP: a. the number of moles of O2 in 44.8 L O2 gas. b. the number of moles of CO2 in 4.00L CO2 gas. c. the volume(L) of 6.40g O2. d. the volume(mL) occupied by 50.0g neon.
June 27, 2010 by Jetta

chemistry
2H2(g) + S2(g) 2H2S(g) Analysis of the contents of a 15.0L flask reveals that there are 4.4 moles of hydrogen gas, 2.0 moles of sulfur gas, and 3.7 moles of hydrogen sulfide gas in the flask at equilibrium. Calculate the equilibrium constant K
April 26, 2014 by HELP! PLZ

chemistry
Which properties of a gas increase linearly as the temperature is increased? A. Volume and density B. Volume and pressure C. Amount of gas and density D. Amount of gas and volume I believe the answer is A or D But I am pretty sure the answer is a
March 23, 2015 by Cortney

Chemistry
Which properties of a gas increase linearly as the temperature is increased? A. Volume and density B. Volume and pressure C. Amount of gas and density D. Amount of gas and volume I believe the answer is A or D But I am pretty sure the answer is a
March 23, 2015 by Cortney

chemistry
1. When gases are collected using displacement of water, some water vapor mixes in with the gas being collected. A student performed a similar experiment in which 35.2 ml of H2 gas was collected over water at a temperature of 21 degrees Celsius. If the barometric pressure was ...
May 2, 2012 by preshi

Chemistry- partial pressures
A sample of gas collected over water at 42 degrees C occupies a volume of one liter. The wet gas has a pressure of .986 atm. The gas is dried and the dry gas occupies 1.04 L with a pressure of 1.00 atm at 90 degrees C. Using this information, calculate the vapor pressure of ...
January 1, 2007 by Dave

chemistry
If the ratio of the rate of effusion of an unknown gas to that of CO under the same conditions is 0.7978, calculate the molar mass (g/mol) of the gas
January 15, 2010 by eng

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

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
find the mass of C3H8 required to generate 2.5x10^8 KJ of energy when combusted with O2 gas to produce CO2 gas and water vapor
November 1, 2010 by sara

Physics
0.490 mol of argon gas is admitted to an evacuated 50.0 cm^3 container at 60.0 C. The gas then undergoes an isochoric heating to a temperature of 400 C. What is the pressure?
January 26, 2011 by Joe

Chemistry
when calculating stoichiometric relationships in gas reactions using the combined gas law why is it important to convert the volumes and pressure to STP?
September 28, 2011 by Maci

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

algebra
a particular hybrid car travels approximately 288mi on 6 gal of gas. find the amount of gas required for a 912-mi trip
December 13, 2011 by karon

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.
January 20, 2012 by Anonymous

Physics
A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.
November 22, 2012 by S

Physics
A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.
November 22, 2012 by A

Physics
A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.
November 23, 2012 by A

Physics
A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.
November 24, 2012 by B

ap chemistry
The volume of 0.100 mol of helium gas at 34C is increased isothermally from 1.00 L to 4.50 L. Assuming the gas to be ideal, calculate the entropy change for the process.
April 12, 2013 by sarah

chemistry
A gas occupies 560.0 mL at 285 K. To what temperature must the gas be lowered if it is to occupy 250.0 mL? Assume that the pressure remains constant.
July 3, 2013 by madison

chemistry
A chemical reaction produced a 0.311 g sample of gas which occupied 225 mL at 55 C exerting a pressure of 886 mm Hg. What is the molar mass of the gas?
August 4, 2013 by JScholz

chemistry
A chemical reaction produced a 0.311 g sample of gas which occupied 225 mL at 55 C exerting a pressure of 886 mm Hg. What is the molar mass of the gas?
August 4, 2013 by JScholz

chemistry
What volume of carbon monoxide gas (at STP) is needed when 1.31 moles of oxygen gas react completely in the following equation? 2 CO + O2 --> 2 CO2
November 10, 2013 by B

Chemistry
A gas diffuses twice as fast as CF4 (g). The molecular mass of the gas is: I'm not sure how to figure this out without the rates of diffusion.
February 11, 2014 by Chloe

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

CHEMISTRTY
IF CO2 TRAVELS 20.5 CM DOWN A 46.0 CM GLASS TUBE IN 1.3*10^4 AS IN THE GRAHAMS LAW EXPERIMENT, THEN COLLIDES WITH ANOTHER GAS. WHAT IS THE MOLECULAR MASS OF THE SECOND GAS?
June 2, 2015 by Joseph

science
a certain mass of gas occupies 600 cm3 and exerted 1.325*10^5 Nm^-2 pressure. at what temperature would the volume of the gas be halved?
April 18, 2016 by Anonymous

chemistry
Calculate the minimum volume oxygen gas that is required for the complete combustion of a mixture of 20cm carbon monoxide and hydrogen gas
April 21, 2016 by lawal

Chemistry 11 grade -
Hydrogen gas was collected in a gas-collecting bottle with a volume of 30.0 mL by water displacement on a day where the temperature was 24C and the barometric pressure was 98.125 kPa. The vapour pressure of water at 24C is 2.99 kPa. What would be the volume of hydrogen gas ...
April 15, 2015 by Tania

Calculus
4. A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling towards the gas station from the east, chasing a stolen truck which is traveling north away from the gas station. The speed of the police car is 100 mph when it ...
April 7, 2010 by MILEY

CALCULUS
A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling towards the gas station from the east, chasing a stolen truck which is traveling north away from the gas station. The speed of the police car is 100 mph when it is 3...
April 8, 2010 by MILEY

chemistry
Gas X has a mass of 28.02 amu and gas Y has a mass of 32 amu. Which gas will diffuse faster?
January 27, 2012 by Anonymous

Algebra
Did I do thes right? 1. Suppose you are at the gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: a) What does the number 3.03 represent? The cost for one gallon of gas. 3.03(g) b) Find...
February 28, 2009 by A.W.

chemistry
1) If the kelvin temperature of a gas sample in a steel tank increases to three times its original value , what will happen to the pressure? I think It will increase. Is this correct? By what factor does the gas pressure change? 2) A gas sample at a constant pressure shrinks ...
March 29, 2008 by Jason

chemistry
A gas of unknown molecular mass was allowed to effuse through a small opening under constant-pressure conditions. It required 52 s for 1.0 L of the gas to effuse. Under identical experimental conditions it required 24 s for 1.0 L of O2 gas to effuse. Calculate the molar mass ...
October 10, 2010 by Jennifer

Chemistry
A car air bag requires 70. L of nitrogen gas to inflate properly. The following equation represents the production of nitrogen gas: 2NaNsubscript3 -> 2Na + 3Nsubscript2 The density of nitrogen gas is typically 1.16g/L at room temp. Calculate the number of grams of ...
January 9, 2010 by Jenna

physics
An ideal gas at 19.8 C and a pressure of 2.79 x 105 Pa occupies a volume of 3.66 m3. (a) How many moles of gas are present? (b) If the volume is raised to 7.20 m3 and the temperature raised to 28.5 C, what will be the pressure of the gas? I got a) right with 419.46, but im ...
April 14, 2015 by P H Y S I C S

Law
1. What demographic of officer is less likely to use physical force and firearms and are more likely to use chemical weapons, such as pepper spray? A. Female officers B. New officers C. Young officers D. Male officers is it D 2. What is the difference between pepper spray and ...
May 29, 2014 by Amy

Physics
Imagine you've finished this academic year and gone home to enjoy your summer vacation. During one of your days of relaxation and non-academic bliss, however, you realize you need to run a few errands. After stopping at the gas station where you fill the gas tank to its ...
November 16, 2010 by Need Help

Science Help!
A student mixed two clear liquids together in a beaker. A gas and a new liquid formed. The gas escaped, so the student was unable to measure its mass. She guessed that its mass was no more than 10.0 [LW1] grams. Her data is shown in the table below. Mass (g) Liquid reactant A=...
November 14, 2014 by Callie

CHEMISTRY
A mixture contains 5.00 g each of O2, N2, CO2, and Ne gas. Calculate the volume of this mixture at STP. Calculate the partial pressure of each gas in the mixture at STP. How do you calculate the mole fraction of each gas?
May 11, 2010 by ~anonymous

math
Alex's car takes 10 gallons of gas for 20.10 miles. If Shon's car uses 3/10 the amount of gas as Alex's car to travelled, what is the mileage for each person's car? How man gallons of gas would each need to travel 4.5 miles?
December 10, 2014 by Sonia

calculus related rates
Boyles law for the expansion of a gas is PV = k, where P is the pressure (in pounds per unit of area), V is the volume of the gas, and k is a constant. Find the expression that shows the rate of change of the pressure as related to the rate of change of the volume. dP/dt...
November 11, 2014 by Bill

Chemistry 101
Iron reacts with hydrochloric acid to produce iron (2) chloride and hydrogen gas.Fe (s)+ 2 HCL (aq) -FeCl2 (aq) + H2 (g).The hydrogen gas from the reaction 2.2g of iron with excess acid is collected in a 10L flask at 25 degrees celcius. What is the pressure of the hydrogen gas...
April 30, 2009 by Eunice

Trigonometry
A car traveling at a constant rate due east passes an interstate exit that is 1.0 mile from a gas station. The gas station is S50E of the exit. After the car has traveled for 2.0 minutes, its bearing to the gas station is S55W. How fast is the car traveling?
September 29, 2014 by Theresa

Chemistry
Two more need help figuring out how to do: How many liters of water vapor can be produced when 8.23 liters of oxygen gas reacts with hydrogen gas (H2g + 02g = H20g. How many liters of water vapor can be produced if 108 grams of methane gas are conbusted at 312K and 98 atm. CH4...
July 23, 2011 by Anonymous

Chemistry
A 3.5 liter gas sample at 20 degrees celcius and a pressure of 650 mm Hg is allowed to expand to a volume of 8570mL. The final pressure of the gas is 0.60 atm. What is the final temeperature of the gas in degrees celcius. Can anyone please show me the steps of how to do this ...
February 28, 2008 by Miley

Chemistry
Hydrogen gas,H2 , reacts with nitrogen gas,N2 , to form ammonia gas,NH3 , according to the equation 3H2+N2-2NH3 How many grams ofNH3 can be produced from 2.90mol ofN2 ? How many grams ofH2 are needed to produce 13.75g of NH3 ? How many molecules (not moles) ofNH3 are produced ...
October 5, 2009 by Rose

chemistry
A compressed gas cylinder contains 1.00 into 1000 g argon gas . the pressure inside the cylinder is 2050 psi at a temp of 18 degree . how much gas remains in the cylinder if the pressure is decreased to 650 psi at a temperature of 26 degree of 26 degree c
October 26, 2014 by mathew

Physics
According to Boyle's law, the volume V of a gas at a constant temperature varies inversely with the pressure P. When the volume of a certain gas is 125 cubic meters, the pressure is 20 psi (pounds per square inch). If the volume of gas is increased to 400 cubic meters, the ...
May 25, 2012 by Pat

Chemistry
What is the final volume of 880. mL of hydrogen gas at 335 mm Hg if the pressure is increased to 735 mm Hg? Assume the temperature and the amount of gas are held constant.
May 1, 2010 by Tiffany22

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
Find the mass of hydrogen gas if 420.5 mL of nitrogen gas reacted to form ammonia at STP according to the equation: 3H2 + N2 = 2NH3
February 10, 2011 by Mia

chemistry
write a balanced equation for this reaction. find out the mass of hydrogen chloride gas needed to react completely with 0.20 g of ammonia gas.
April 1, 2011 by jania

Chemistry
If the molar volume of an ideal gas is 22.4 L/mol, calculate the theoretical density of hydrogen gas at STP. Not sure what formula to use with this question. Thanks.
April 27, 2011 by Thao

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

chemistry
what is the universal gas constant( the R, in the equation PV=nRT) of this question? What is the pressure in a 10.0-L cylinder filled with 0.470 mol of nitrogen gas at a temperature of 329 K?
October 23, 2011 by samantha(very important)

10th grade chemistry
If an excess of nitrogen gas reacts with 25.0 L of hydrogen gas, according to the reaction below, how many L of ammonia will be produced? N2(g) + 3H2(g) ---> 2NH3(g)
May 29, 2012 by skyler

Physics please help me :)
If 3.4 mol of methane is heated so that the temperature of the gas increases 45 K while its pressure remains constant, how much heat is added to the gas?
June 23, 2012 by Meg

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?
November 14, 2012 by Sarah

PHYSICS DUE SOON
A gas is compressed at a constant pressure of 0.800 atm from 6.00 L to 1.00 L. In the process, 380 J of energy leaves the gas by heat. ____J
November 29, 2012 by Ame

Chemistry
If there are 5 liters of oxygen gas (O2) at 300 K and 400 torr, what will it weigh? Answer in units of g. Do I use the Ideal gas law formula for this problem?
January 29, 2013 by Peter

math
a man pays 60 cents for every 200m3 of gas used,plus a fixed charge of $13.75. How much does he pay when he uses 55 000m3 of gas?
April 28, 2013 by Jenna

science
A gas occupying 43 mL at standard conditions is heated to 29 celsius while the pressure is reduced to 0.84091 atm. What is the new volume occupied by the gas?
March 9, 2014 by perla

Chemistry
The reaction between 32.0g of CH4 and excess oxygen gas produces 75.9 of CO2 gas and some water. Determine the percent yield? Plss help :((
March 12, 2014 by juju

Chem
A 500 -cm3 flask contains 0.420g of a gas at a pressure of 160kPa and a temperature of 330K. What is the molecular mass of this gas? M=____g/mol? Ty
April 16, 2014 by Brady

Chemistry
An unknown gas is placed in a 1.500 L bulb at a pressure of 356 mm Hg and a temperature of 22.5 ∘C, and is found to weigh 0.8108g .What is the molecular mass of the gas?
April 27, 2014 by Tyler

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

Chemistry
If vapour density of gas 32g and occupies a volume of 560cm cube find the mass of the gas also determine its number of molecule
June 2, 2014 by Goodness

Chemistry
A flexible balloon containing 1.5 mol of... ideal gas at constant pressure of 1.5 at... 100 C. Calculate the change in intern...‡ (ΔE) of the gas.
February 11, 2015 by N

Chemistry
An unknown gas sample is collected in a 255mL container at 25 C and 755 mmHg. How many moles of gas are present? show solution please so i can learn:D
February 19, 2015 by Dianne

college chemistry
solid diarsenic trioxide reacts with Flourine gas to produce liquid arsenic pentaflouride and oxygen gas. Write the Qc for this reaction
March 24, 2015 by Mia

Chemistry help
A gas occupying 29 mL at standard conditions is heated to 14◦C while the pressure is reduced to 0.98682 atm. What is the new volume occupied by the gas?
March 29, 2015 by Quintin

Chemistry
To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 5.3-L bulb, then filled it with the gas at 1.30atm and 27.0 ∘C and weighed it again. The difference in mass was 7.9g . Identify the gas. Express your answer as a ...
August 20, 2014 by Sam

physics
A cylinder of gas is compressed by a piston from an intial volume of 125 litres to a final volume of 90 litres.The compression occurs at constant pressure and work done on the gas by the piston is 10^4J.What is the gas pressure during compression
November 29, 2014 by takunda

Physics
An ideal gas at 6.0C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and the temperature raised to 30.5C, what will be the pressure of the gas? Pa
April 20, 2008 by Tasha

physics
An ideal gas at 18.5C and a pressure of 1.54 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 5.30 m3 and the temperature raised to 31.0C, what will be the pressure of the gas? Pa
April 26, 2008 by Sophia

Math
A bus can cover a distance of 6 miles in 1 gallon of gas. The cost of gas is $4 per gallon. What will be the cost of gas used in driving the bus for 96 miles?
March 12, 2015 by kevin

chemistry
Zinc combines with hydrochloric acid to form aqueous zinc chloride and hydrogen gas. If 300.0 mL of a 0.150 M solution of HCl is allowed to react with excess zinc, how many moles of hydrogen gas would be produced? Part two: if this reaction happens at STP what volume of ...
March 6, 2012 by Anonymous

science- I need help!
1. How do you know when something is gas? 2. What is gas made of? [I think it's molecules and atoms?] 3. How do you know when something is matter? [I believe that when something has a mass and volume..its matter. Is that correct? 4. Is gas matter? [This question got me ...
January 23, 2008 by Jeanine

Math 115 # 19
The following information shows a relationship between the speed of a certain car over a 100-mi test trip and the gas mileage obtained: Speed 40 45 50 55 60 gas millage 35 33 28 25 22 Use this information to make a line graph and then predict the gas mileage associated with a ...
January 9, 2009 by Deb

Chemistry
which phase change is endothermic ? (1)gas-->solid (2)gas-->liquid (3)liquid-->solid (4)liquid-->gas
January 9, 2011 by Jazmin

Chemistry
A mixture of Nitrogen and Argon gases in a balloon exerted a pressure of 2.55 atm. Given that there were 1.0 g nitrogen gas and 3.2 g argon gas in the balloon, calculate the partial pressure of argon gas.
May 2, 2011 by Mandy

chemisrty
What is the total pressure of the gas produced in the burette if it contains nitrogen gas whose pressure is 1.5 atm, oxygen gas whose pressure is 1.6 atm and water vapour with a pressure of 1.3 atm.
May 24, 2015 by lusiana

Chemistry
A mixture of nitrogen gas and hydrogen gas reacts in a closed container to form ammonia gas. The reaction ceases before either reactant is completely consumed. At this stage the container has 3.0 mol each of all three gases; nitrogen, hydrogen and ammonia. How many moles of ...
June 30, 2013 by megs

chemistry
A mixture og gases has a total pressure off 28.3 atm, it is made of: 5.8 atm of hydrogen gas, 7.2 atm of nitrogen gas, 3.5 atm of oxygen gas and some amount of methane. What is the pressure of methane? what is the pressure of methane in kPa?
March 26, 2015 by Anonymous

chemistry
A compressed gas cylinder of H2 containing 25 l at 200,000 kPa of pressure is emptied due a leak in a gas chromatography laboratory, with the following dimensions: 5 m long, 4 meters wide and 2.5 m height. Calculate the % oxygen and hydrogen in the atmosphere of the laboratory...
June 27, 2012 by Uwaoma

Chemistry
What gas is produced by the reaction of magnesium and HCl as evidenced by the "poof" test? acids react with active metals to yield hydrogen gas and a salt.
May 16, 2007 by Louise

Science
Balanced chemical equation for the carbon monoxide gas for motor car engines combines with the oxygen gas in the air to produce carbo dioxide
September 27, 2010 by Sibusiso

chemistry
an ideal gas at 75.0 c and 760 .mm hg is contained in a flexible vessel. Its volume is doubled and the pressure remains.unchanged .determine the temperature of the gas as a consequence of these changes
August 26, 2011 by devin boutte

Physics Help
0.30 mol of argon gas is admitted to an evacuated 50cm^3 container at 20 C. The gas then undergoes an isobaric heating to a temperature of 340C. What is the set up for this? I can plug in the values
August 15, 2011 by Lizzie

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

Physics (12th Grade)
When an ideal diatomic gas is heated at constant pressure then what fraction of heat given is used to increase internal energy of gas?
April 9, 2012 by Tulika

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