Tuesday
December 6, 2016

Search: gas

Number of results: 9,133

chemistry
the specific heat of a gas is found to be 0.075 calories at constant volume & its formula weight is 40. the atimicity or the valency of the gas is ............
December 27, 2008 by hriday

physics
Suppose you do 100j of work in compressing a gas, if 80j of heat escapes in the process, what is the change in internal energy of the gas?
December 29, 2009 by Anonymous

chemistry
a 500.0 mL gas sample at STP is compressed to a volume of 300.0 ml and the temperature is increased to 35.0 C. What is the new pressure of the gas in pascals?
March 16, 2010 by catherine

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..?
April 18, 2010 by Susie

Chemistry
To what Celsius temperature must 44.0 mm Hg of methane gas at 89.0°C be changed so the pressure will be 83.0 mm Hg? Assume the volume and the amount of gas are held constant.
May 1, 2010 by Tiffany

Chemistry
To what Celsius temperature must 44.5 mL of methane gas at 43.0°C be changed so the volume will be 63.0 mL? Assume the pressure and the amount of gas are held constant.
May 2, 2010 by Megan

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?
August 6, 2010 by TangenT

AP Chemistry
A 1.00-L gas sample at 100°C and 600 torr contains 50% helium and 50% xenon by mass. What are the partial pressures of the individual gas?
November 3, 2010 by Anonymous

chem
What is the volume of 325 mL of a sample of gas at 51.0°C and 710. mm Hg if the conditions are adjusted to STP? Assume the amount of gas is held constant.
November 29, 2010 by Kate

chem
What is the volume of 325 mL of a sample of gas at 51.0°C and 710. mm Hg if the conditions are adjusted to STP? Assume the amount of gas is held constant.
November 29, 2010 by Kate

Chemistry
To what Celsius temperature must 32.5 mL of methane gas at 60.0°C be changed so the volume will be 62.0 mL? Assume the pressure and the amount of gas are held constant.
April 14, 2011 by Mary

Chemistry
What is the volume of 150. mL of oxygen gas at 72.0°C and 110. mm Hg if the conditions are adjusted to 750. mm Hg and 82.5°C? Assume the amount of gas is held constant.
April 14, 2011 by Mary

Chemistry
What is the pressure of 495 mL of oxygen gas at 30.5°C and 710. mm Hg if the conditions are adjusted to 310. mL and 80.5°C? Assume the amount of gas is held constant.
April 14, 2011 by Mary

Chemistry
If a certain gas has a density of 2.34 g/L at 27.0C and 742 torr, what is the molar mass of this gas? I am not sure what formula to use to solve this problem.
April 27, 2011 by Thao

chemistry
what is the molar mass of the unknown gas that diffuses 0.250 times as fast as hydrogen gas under the same circumstances?
August 9, 2011 by Aamna Qamar

physics
The temperature of 2.7 moles of an ideal gas is 471 K. How much work does the gas do in expanding isothermally to 3.7 times its initial volume?
December 7, 2011 by Sami

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
January 19, 2012 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
January 19, 2012 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
January 19, 2012 by Anonymous

chemistryy
The reaction between 34.0 g of NH3 and excess oxygen gas produces 45.9 g of NO gas and some water. Determine the percent yield.
May 18, 2012 by bri

chemistryy
The reaction between 34.0 g of NH3 and excess oxygen gas produces 45.9 g of NO gas and some water. Determine the percent yield.
May 18, 2012 by bri

thermal physic
What is the average translational kinetic energy of one mole Of gas molecule in an ideal gas at 37degree celsius
January 19, 2013 by john

chemistry
Oxygen gas is collected over water at a temperature of 20c. If the totalmpressure of the system is 755mm, what is the pressure of the dry O2 gas?
April 16, 2013 by karina

Chemistry
The volume of a mass of gas is 300 ml at 25°C and 685 torr. What will the gas occupy at STP? Will the temperatures be the same when I do (P1V1/T1) = (P2V2/T2) ?
May 1, 2013 by haley

chemistry
if 0.896 grams of a gas occupies a 250 ml flask at 20 degrees celcius and 760 mm hg of pressure,what is the molar mass of the gas?
August 6, 2013 by albius

chem
What volume of carbon dioxide gas (at STP) is produced when 1.01 moles of oxygen gas react completely? 2CO + O2 -> 2CO2
November 10, 2013 by Dakota

Math
If your car gets 18 miles per gallon of gas, how many pints of gas will you need to take a 698 mile trip
July 17, 2014 by Beth

Chemistry
A 32.3-L of a gas at 30 degrees Celsius and 1.20 atm is to be cooled at constant pressure until its volume becomes 28.4 L. What will be the new gas temperature?
October 14, 2014 by Samone

chem3A
7.34 grams of a gas occupies a volume of 2.5 liters at a pressure of 1216. mm and a temperature of 73 degrees celsius. What is the molecular weight of the gas?
April 9, 2015 by Ana

physics
Heat Q is added to a monatomic ideal gas at constant pressure. As a result, the gas does work W. Find the ratio Q/W. What in the world is this asking??
November 29, 2015 by Alyna

math
Nancy drove 110 km using 13.5 liters of gas. What was her gas mileage in miles per gallon? A. 3.47 B. 68.2 C. 19.14 D. 20 The answer is D=20 gallons
March 17, 2016 by jill

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?
July 27, 2016 by John

chemistry
sulfur trioxide gas dissociates into sulfer dioxide gas and oxygen gas at 1250 degrees C. In an experiment, 3.6 moles of sulfur trioxide were placed into an evacuated 3.0-L flask. THe concentration of sulfur dioxide gas measured at equilibrium was found to be 0.20 M. What is ...
April 29, 2007 by alexa

Advance Chemistry
A series of measurements are made in order to determine the molar mass of an unknown gas. First, a large flask is evacuated and found to weigh 134.567 g. It is then filled with the gas to a pressure of 735 torr at 31°C and reweighed; its mass is now 137.456 g. Finally, the ...
March 6, 2008 by A51AN

Chemistry
The van der Waals equation for real gases recognizes that (A) the molecular atrractions between paritcles of a gas decreases the pressure exerted by the gas (B) the non-zero volumes of gas particles effectively decrease the amount of "empty space" between them (C) gas ...
January 3, 2010 by Anonymous

chem
When solid calcium is placed in water, it undergoes a vigorous reaction that produces solid calcium oxide, CaO(s) and hydrogen gas. determine the volume of dry hydrogen gas that is produced when 5.00 g of calcium reacts and the gas is collected at 42 degrees celsius and 770 ...
January 12, 2015 by julie

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 (25.0°C) to boiling (100.0°C)? 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) ¡ê 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 64.0°C 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 34°C 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
What volume of oxygen gas is needed for the complete combustion of 4.00 L of ethane gas, C2H6? Assume that the temperature and pressure of the reactants are the same.
May 7, 2016 by Lauren

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

Chemistry
Hydrogen gas is produced industrially by reacting methane gas, CH4 (g), with water vapor to from carbon monoxide and hydrogen gas. In a particular reaction, 25.5L of methane (measured at a pressure of 732 torr and a temperature of 25degree Celcius) mixes with 22.8 L of water ...
November 17, 2016 by Cali234

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

math
gas tank is 1/6 full. after pumping 9 gallons gas it is 5/6 full. how much gas does tank hold? How many gallons were first in the tank?
October 30, 2016 by ellie

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
Boyle’s 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 S50°E of the exit. After the car has traveled for 2.0 minutes, its bearing to the gas station is S55°W. 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

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

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 22.3°C 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

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