Thursday
April 24, 2014

Search: at a pressure of 1 atm

Number of results: 6,972

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 ...
Friday, May 25, 2012 at 3:11am by Pat

physics
An unknown liquid fills a square container of sides 10 m. What is the density of a material if the pressure 5 m below the surface is 1.6 atm? Assume g=10 m/s^2 and the pressure at the surface of the liquid is 1 atm. Also assume that 1 atm = 10^5 Pa. (Hint: make sure to use the...
Monday, March 25, 2013 at 9:37pm by Pri

Chem
i dont get this ?.......If the weather forecast stated that the pressure is 104.2kpa. then what is the pressure in the atmosphere? and what would a barometer measure in mm of mercury need help please
Tuesday, January 20, 2009 at 11:10pm by Z

chem
A 250 mL sample of oxygen is collected over water at 25 degrees Celcius and 760.0 torr pressure. What is the pressure of the dry gas alone?
Tuesday, February 2, 2010 at 10:41pm by joey

chemistry 106
calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.
Sunday, February 28, 2010 at 11:16pm by Tanisha

chemistry
The vapor pressure of water at 30 Celsius is 31.82 mmHg and the density is 0.9956 g/mL. What is the new pressure after adding enough sorbitol to make a 2.7 m solution?
Sunday, March 14, 2010 at 6:57pm by mister

college chemistry
calculate the pressure exerted by 2.50 moles of CO2 confined in a volume of 5.00 L at 450K. Compare the pressure with that predicted by the ideal gas equation.
Thursday, July 8, 2010 at 9:59pm by david

college chemistry
calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.
Thursday, July 8, 2010 at 10:02pm by david

chemistry
A gas has pressure of 43 pKa. What is the pressure in mm Hg?
Friday, February 3, 2012 at 12:27pm by Anonymous

Physical chemistry
Estimate the vapor pressure of sea water at 20C given that the vapor pressure of pure water is 2.338 kPa at that temperature and the solute is largely Na+ and Cl- ions, each present in about .50 mol/dm^3. I'm pretty sure the formula to use is pj=xjpj'. Where pj' is the vapor ...
Thursday, September 30, 2010 at 8:27pm by Melissa

Chemistry
A 69.4 L cylinder containing C2H6 at a pressure of 570 torr is connected by a valve to 105 L cylinder containing C6H6 at 0.350 atm pressure. Calculate the partial pressure (atm) of C6H6 when the valve is opened.
Saturday, April 16, 2011 at 4:31pm by itsliferight

Physics
You fill your tires with air on a cold morning (-5degreesC) to 220-kPa gauge pressure, then drive into a 32degreesC desert. (a) Assuming the volume of air in the tires remains constant, what's the new gauge pressure? (b) what would be the gauge pressure if the volume of air ...
Tuesday, January 24, 2012 at 10:18pm by Haylee

Chemistry
1. If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at constant temperature. What is the new volume? 2. A gas with a volume of 4.0L at a pressure of 205kPa is allowed to expand to a volume of 12.0L. What is the pressure in the container if the temperature remains...
Wednesday, January 15, 2014 at 3:55am by Ashley Kate

Calculus
24. A pharmaceutical company has determined that a realistic model for the relationship between blood pressure (systolic) and the amount of a nerve drug designed to reduce the systolic pressure is given by the equation P=Pi + 2x - x^2. P is measured in millimeters of mercury ...
Sunday, November 11, 2007 at 5:30pm by Molly

Chemistry
a gaseous mixture of nitrogen and oxygen has a total pressure of 770 torr. the partial pressure of nitrogen is 700 torr. what is the partial pressure of oxygen?
Monday, April 7, 2014 at 10:40pm by ASAP!!

Chemistry
Generally, the solubility of gases in liquids increase with a-decreasing temperature & increasing pressure b-increasing temperature & decreasing pressure c-decreasing temperature & decreasing pressure d-increasing temperature & increasing pressure
Friday, July 23, 2010 at 12:34am by Mary

Physical Chemistry
The measured osmotic pressure of seawater is 25 atm at 273K. a.) What is the activity of water in seawater at 273 K? Take the partial molar volume of water in seawater to be 0.018 M-1. b.) The vapor pressure of pure water at 273 K is 4.6 torr. What is the vapor pressure of ...
Thursday, October 12, 2006 at 3:04am by Jane

Chemistry
The output of a diesel generator, which contains a mixture of CO2 and H2O gases, is collected in a sealed vessel at 447 K. As the mixture cools to 298 K, the pressure falls from 3.0 atm to 0.80 atm. What is the ratio of CO2 to H2O in the mixture? Have you tried using Avagadro'...
Sunday, July 22, 2007 at 3:54am by Vic

Chemistry
Sulfur trioxide gas, one of the causes of acid rain, is produced in the upper atmosphere when oxygen reacts with sulfur dioxide gas in the reaction shown below: 2SO2(g) + O2(g) <--> 2SO3(g) deltaH0 = -197kJ The gases are placed in a reaction vessel and allowed to come to...
Friday, April 6, 2012 at 1:31pm by Abbagail

chem
The following reaction is used in some self-contained breathing devices as a source of O2. 4KO2(s) + 2C02(g)---> 2K2CO3(s) + 3O2(g) Suppose that a sample of CO2(g) is added to an evacuated flask containing KO2(s) and equilibrium is established. The equilibrium partial ...
Thursday, April 2, 2009 at 12:18pm by tomi

Chemistry
A system at equilibrium contains I2(g) at a pressure of 0.23 atm and I(g) at a pressure of 0.24 atm. The system is then compressed to half its volume. Find the pressure of I2 when the system returns to equilibrium. Find the pressure of I when the system returns to equilibrium.
Saturday, February 25, 2012 at 12:25am by Anjali

pgcc
A system at equilibrium contains I2(g) at a pressure of 0.23 atm and I(g) at a pressure of 0.24 atm. The system is then compressed to half its volume. A).Find the pressure of I2 when the system returns to equilibrium. B).Find the pressure of I when the system returns to ...
Tuesday, February 19, 2013 at 10:55pm by ben1987

college alegebra
Solve the problem. The volume V of a gas varies inversely as the pressure P on it. The volume of a gas is 240 cm3 under a pressure of 23 kg/cm2 What will be its volume under a pressure of 30 kg/cm2?
Wednesday, February 25, 2009 at 11:20am by tony

Chemistry
A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?
Saturday, October 30, 2010 at 4:01pm by Pat

chemistry
a 5.0 dm3 sample of oxygen at a pressure of 200 kPa and 2.0 dm3 sample of nitrogen at a pressure of 500 kPa are introduced into a 2.5 dm3 vessel. what is the total pressure in the vessel?
Sunday, April 10, 2011 at 5:05am by sandra

PLEASE HELP! PHYSICAL CHEM
The measured osmotic pressure of seawater is 25 atm at 273K. a.) What is the activity of water in seawater at 273 K? Take the partial molar volume of water in seawater to be 0.018 M-1. b.) The vapor pressure of pure water at 273 K is 4.6 torr. What is the vapor pressure of ...
Saturday, October 14, 2006 at 5:31am by Amy

Calculus
Air pressure at sea level is 30 inches of mercury. At an altitude of h feet above the, air pressure, P, in inches of mercury, is given by, P =30e^(-3.23x10-5h) a)Find th equation of the tangent line at h=0. b)A rule of thumb is given by travelers is that air pressure drops ...
Monday, October 22, 2012 at 7:47pm by Andy

Calc
Air pressure at sea level is 30 inches of mercury. At an altitude of h feet above the, air pressure, P, in inches of mercury, is given by, P =30e^(-3.23x10-5h) a)Find th equation of the tangent line at h=0. b)A rule of thumb is given by travelers is that air pressure drops ...
Tuesday, October 23, 2012 at 9:07am by Andy

Chem
A 150.0 mL cylinder containing CO at a pressure of 9.50 atm is connected by a valve to 9500 mL cylinder containing B5H9 at 2280 torr pressure. Calculate the partial pressure (atm) of B5H9 when the valve is opened.
Friday, April 15, 2011 at 8:25pm by noclueboo

Physics
Bioluminescence Some species of dinoflagellate (a type of unicellular plankton) can produce light as the result of biochemical reactions within the cell. This light is an example of bioluminescence. It is found that bioluminescence in dinoflagellates can be triggered by ...
Thursday, April 17, 2014 at 12:34am by Brady

Chemistry
A steel tank at 300 K contains 0.285 L of gas at 1.92 atm pressure. The tank is capable of withstanding a maximum pressure of 5.76 atm. Assuming that doubling the kelvin temperature causes the internal pressure to double, a. at what temperature will the tank burst? b. will it ...
Wednesday, January 16, 2013 at 10:14pm by Sara

Health (Ms. Sue)
1. Compare the two types of pressure to become sexually active. A: The internal pressure one feels to become sexually active comes from within oneself, whereas the sources of external pressures to be sexually active include boyfriends or girlfriends, the media, and your peers...
Friday, December 13, 2013 at 4:13pm by Anonymous

physics(gas laws)
Got a question 3. Given 325 ml of saturated gas at 760 mmHg and 25C, what would be its volume if dry at the same pressure and temperature? I got confused when I read 'if dry' Does that mean I have to subtract something out of 760mmHg? And would I used the combined gas law and...
Sunday, January 27, 2008 at 9:38pm by abby

Chemistry
A closed container is filled with oxygen. The pressure in the container is 435kPa . What is the pressure in millimeters of mercury? (i know that 1atm=760mm Hg=101,325 Pa) How do I use this to solve for the question? so: 435kPa*101,325=44,076,375Pa, & O2 = 32g/mol & you must ...
Saturday, October 20, 2007 at 9:33pm by leo

physics
When you suddenly stand up after lying down for a while, your body may not compensate quickly enough for the pressure changes and you might feel dizzy for a moment. (a) If the gauge pressure of the blood at your heart is 14.3 kPa and your body doesn't compensate, what would ...
Saturday, November 6, 2010 at 10:15pm by john

MATH PLEASE HELP!
According to Boyle's law, the pressure p of a compressed gas is inversely proportional to teh volume, v. If a pressure of 20 pounds per square inch exists when the volume of the gas is 500 cubic inches, what is the pressure when the gas is compressed to 400 cubic inches?
Wednesday, January 7, 2009 at 8:51pm by Roger

science
A weather balloon carries instruments that measure temperature, pressure, and humidity as it rises through the atmosphere. Suppose such a balloon has a volume of 1.2 m^3 at sea level where the pressure is 1 atm and the temperature is 20C. When the balloon is at an altitude of...
Saturday, November 19, 2011 at 11:58pm by Shirley

calcq
2- The earths atmospheric pressure p is often modeled by assuming that the rate dp/dh at Which p changes with the altitude h above sea level is proportional to p. Suppose that the pressure at sea level is 1013 millibars (about 14.7 pounds per square inch) and that the ...
Wednesday, April 11, 2007 at 7:18pm by kaela

chemistry
Two gases are contained in gas bulbs connected by a valve. Gas A is present in a 56 L bulb at a pressure of 213 torr. Gas B exerts a pressure of 683 torr in a 74 L bulb. What is the partial pressure of gas B after they equilibrate once the valve has been opened? Answer in ...
Monday, November 1, 2010 at 5:57pm by Bob

chemistry
A gaseous mixture at a total pressure of 1.50 atm contains equal molar amounts of He, Ne, and Ar. At constant temperature CO2 gas is added to the mixture until the total pressure is 3.00 atm. Which of the following is a correct statement concerning partial pressures after the ...
Friday, April 18, 2008 at 1:08pm by Sam

garyson
A person rides up a lift to a mountaintop, but the persons ears fail to pop that is, the pressure of the inner ear does not equalize with the outside atmosphere. The radius of each ear drum is 0.4010-2m. The pressure of the atmosphere drops from 1.010105 Pa at the bottom ...
Saturday, December 24, 2011 at 1:12am by jhon

Anatomy
Is osmotic pressure the hydrostatic pressure on the side of a semiperable membrane containing the hypertonic solution which opposes the movement of water particles and can therefore stop osmosis? T OR F
Wednesday, September 12, 2007 at 12:02am by Amanda

ap chem
the decomposition of (CH3)2O has a rate constant of 6.8x10^-4 s^-1. the initial pressure is 135 torr, what is the partial pressure after 1420s? i don't have the slightest idea on how to solve this.
Sunday, February 17, 2008 at 1:45pm by anna

physics
please help me by showing steps thanks Assuming atmospheric pressure to be 1.01 * 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure at a depth of 15.0m below the surface of the ocean? thanks again:)
Saturday, February 14, 2009 at 11:08am by y912f

Chemistry
Suppose the atmospheric pressure during the experiment was 751 mmHg. The temperature of the water was found to be 23.0 degrees celsius. What is the pressure of the oxygen gas, Po2 that is produced?
Thursday, September 27, 2012 at 11:18am by Casey

Chemistry
An aerosol can is empty, except for the propellant gas which exerts a pressure of 1.20 atm at 21 C. If the can is thrown into a fire and heated to a temperature of 565 C, what will be the pressure inside the hot can?
Tuesday, October 15, 2013 at 11:16pm by Blake

CHEMISTRY
ok i have no idea what a 7 letter word for : force resulting from the collisions of gas particles is... so if u have any ideas to what it could be would be great. thanks kinetic? idk pressure is a force.... pressure is a eight letter word I think someone miscounted the letters...
Sunday, March 18, 2007 at 4:43pm by JOE

Chemistry!!!~!!
A solution of sodium chloride in water has a vapor pressure of 18.5 torr at 25C. What is the mole fraction of NaCl in this solution? What would be the vapor pressure of this solution at 48C? The vapor pressure of pure water is 23.8 torr at 25C and 83.7 torr at 48C. I've ...
Monday, April 19, 2010 at 10:35am by Jenn

chemistry
With respect to Boyle's law (lab experiment with textbooks on an apparatus), if in the classroom the air pressure in the classroom is equal to 2.4 textbooks, how does one find the total pressure of a book with the volume of 26? Am I on the right track by dividing the volume of...
Monday, April 4, 2011 at 7:10pm by Rosie829

chemistry
Divers know that the pressure exerted buy the water increases about 100kpa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kpa; at 20.4 m , the pressure is 301 Kpa; and so forth. Given that the volume of a balloon is 3.5L at STP and...
Friday, February 7, 2014 at 8:55am by Natasha

chem
For the reaction: PCl3(g) + Cl2(g) --> PCl5(g) at 85 degreeC, Kp = 1.19 If one starts with 2.00 atm pressure of PCl3, 1.00 atm pressure of Cl2 and no PCl5, what is the partial pressure of PCl5(g) at equilibrium?
Wednesday, March 12, 2008 at 2:37am by jack

college
A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mm Hg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?
Saturday, November 13, 2010 at 9:55am by malik

CHEM
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 C when reverse osmosis stops? Mc=? ...
Sunday, February 19, 2012 at 6:56pm by JSJFJF

Physics
Im having trouble understanding the concept of pressure. Help please! What is the pressure at the bottom of a tube of mercury that is 0.2 m deep? An elephant with a mass of 1000 kg stands on a circus platform that weighs 50 kg. The area of the bottom of the platform is 1.25 m...
Thursday, September 15, 2011 at 2:02am by John

Physics
Im having trouble understanding the concept of pressure. Help please! What is the pressure at the bottom of a tube of mercury that is 0.2 m deep? An elephant with a mass of 1000 kg stands on a circus platform that weighs 50 kg. The area of the bottom of the platform is 1.25 m...
Thursday, September 15, 2011 at 2:09am by John

Chemistry
A mixture of hydrogen and oxygen gas has pressure of 1.60 atm. Partial pressure of oxygen is 304 mmHg atm, what is the partial pressure of hydrogen?
Tuesday, November 9, 2010 at 4:47pm by Sandra

Chemistry
Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.6 L of water upon warming from 25 C to 50 C. Assume that the water is initially saturated with nitrogen and oxygen gas at 25 C and a total ...
Thursday, September 17, 2009 at 8:19pm by RE

science
3. Liquefied air (assuming it is only O2 and N2) is kept in a container where pressure and temperature can be controlled. a. What is the maximum temperature at which the mixture exists as a liquid? If this temperature is kept constant, what is the minimum pressure to keep the ...
Tuesday, March 11, 2014 at 2:13pm by haha

Chem
A bicycle tire is filled with air to a pressure of 100 psi at a temperature of 19C. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58C. The volume increases by 4%. What is the new pressure of the tire? Convert the temps to Kelvins, then use ...
Saturday, September 30, 2006 at 2:17pm by Mew

physics
The door and the seals on an aircraft are subject to a tremendous amount of force during flight. At an altitude of 10,000 m (about 33,000 ft), the air pressure outside the airplane is only 2.7 x 104 N/m2, while the inside is still at normal atmospheric pressure, due to ...
Monday, August 1, 2011 at 12:59am by Anonymous

PHYSICS
The door and the seals on an aircraft are subject to a tremendous amount of force during flight. At an altitude of 10,000 m (about 33,000 ft), the air pressure outside the airplane is only 2.7 x 104 N/m2, while the inside is still at normal atmospheric pressure, due to ...
Monday, August 1, 2011 at 1:00am by Brittney

Physics
The pressure gauge on a tank registers the gauge pressure, which is the difference between the interior and exterior pressure. When the tank is full of oxygen (O2), it contains 9.00 kg of the gas at a gauge pressure of 40.0 atm. Determine the mass of oxygen that has been ...
Sunday, April 11, 2010 at 4:41pm by Tmurg

college chemistry
Manometers can use liquids other than mercury to measure small pressure differences. On a day when the barometric pressure is 761.7 torr, a water manometer, connected between the atmosphere and a glass bulb containing a sample of helium gas has a height difference of 26.1 cm, ...
Saturday, October 16, 2010 at 3:23pm by jojo

chemistry
Consider a 50 L tank which hold 20 g of hydrogen gas, 20 g of carbon dioxide gas, and 20 g of krypton gas, at a total pressure of 600 KPa. 1. which gas has the largest partial pressure? 2. Which gas the smallest average speed? 3. What is the temperature of this gas mixture? 4...
Thursday, January 20, 2011 at 2:18pm by Hunter

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 ...
Friday, November 25, 2011 at 12:11pm by John

Chemistry
In a fixed volume container, 6*10^23 molecules of a gas exert a pressure of 12 N/m^2. If 12*10^23 molecules of gas were added to the container, what would the pressure become? PV=nRT P=pressure in atm V=volume in L T=absolute (kelvin) temperature R=0.082 L atm/mole K n=number ...
Thursday, May 27, 2010 at 5:03pm by Mike

chemistry
A 265- mL flask contains pure helium at a pressure of 747 torr. A second flask with a volume of 485 mL contains pure argon at a pressure of 721 torr .If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium?
Thursday, September 30, 2010 at 10:25am by kat

bio
are blood pressures have differences between genders?explain your answer. -from what i know, women have lower risk to get high blood pressure but for the range of normal blood pressure, i think there is no differences. pls correct me if i wrong and if im right can i know the ...
Saturday, January 7, 2012 at 4:00am by Yuni

chemistry
Exhaled breathe is a mixture of Nitrogen, oxygen, carbon dioxide and water vapor. What is the partial pressure of CO2(torr) in exhaled breathe at 37.0 degree C if the partial pressure of Oxygen is 116 torrr and that of nitrogen is 659 torr. Assume the atmospheric pressure is 1...
Friday, October 26, 2012 at 10:28am by carina 78

physics
A sample of gas at P = 1123 Pa, V = 1.41 L, and T = 291 K is confined in a cylinder a) Find the new pressure if the volume is reduced to half of the original volume at the same temperature. b) If the temperature is raised to 391 K in the process of part (a), what is the new ...
Tuesday, December 27, 2011 at 7:19am by maria

Chem again sorry
A solution of sodium chloride in water has a vapor pressure of 18.3 torr at 25C. What is the mole fraction of NaCl in this solution? __________ What would be the vapor pressure of this solution at 45C? The vapor pressure of pure water is 23.8 torr at 25C and 71.9 torr at 45...
Sunday, November 30, 2008 at 12:06am by Dina

Science
Why is is it important to place your arm in a horizontal position rather than letting it hang down at your side when you take your blood pressure? Does everyone's heart create the same pressure? Why or why not?
Saturday, January 12, 2008 at 11:39am by Jake

chemistry
A gas is heated from 256 K to 287 K while its volume is increased from 20.0 L to 30.0 L by moving a large piston within a cylinder. If the original pressure was 1.16 atm, what would be the final pressure?
Monday, March 12, 2012 at 10:20pm by jamella

Chemistry
a gas misture containing N2 and O2 was kept inside a 2.00 L container at a temp of 23.0 degrees C and a total pressure of 1.00atm. The partial pressure of O2 was 0.722atm. How many grams of Nitrogen were present in the mixture?
Saturday, April 28, 2012 at 11:11am by RoseBud

Physics
In a sound wave, we find a location and time when the density fluctuations are at a maximum. At this same location and time ... a) Pressure fluctuations and displacement are minimum. b) Pressure fluctuations and displacement are maximum. c) Pressure fluctuations are maximum ...
Wednesday, May 18, 2011 at 8:32pm by Brandy

Math IN URGENT NEED OF FEEDBACK
If the temperature is constant, then the atmospheric pressure P (in pounds/square inch) varies with the altitude above sea level h in accordance with the law given below where p0 is the atmospheric pressure at sea level and k is a constant. P = p0e-kh If the atmospheric ...
Wednesday, April 13, 2011 at 12:08pm by Anonymous

chemistry
A mixture of O2 and He is prepared for a scuba diver who is going to descend 200 ft below the ocean surface. At that depth, the diver breathes a gas mixture that has a total pressure of 7.00 atm. If the pressure of the O2 in the tank at 200 ft below the ocean surface is 1140 ...
Sunday, December 12, 2010 at 9:57pm by steph

Mass Transfer
Solution of methanol and ethanol are substantially ideal. (a) Compute the vapour-liquid equilibria for this system at 1 and at 5 atm abs pressure, and plot xy and txy diagrams at each pressure (b) For each pressure compute relative volatilities , and determine an average value...
Tuesday, April 8, 2014 at 10:35am by RHS

Chemistry
An 8.07g sample of impure Ag2O decomposes into solid silver and O2(g). If 395mL O2 is collected over water at 25C and 749.2mmHg barometric pressure, then what is the percent by mass of AgO2 in the sample? The vapor pressure of water at 25C is 23.8mmHg. Could someone help me ...
Friday, September 27, 2013 at 3:49pm by Nancy

General Chemistry
A balloon is filled with helium gas at 23 degrees C. The balloon expands until the pressure is equal to the atmospheric pressure of 755 toor. The balloon rises to an altitude of 6000 feet where the pressure is 550 toor and the temperature is 5 degrees C. Calculate the percent ...
Sunday, September 4, 2011 at 11:53pm by Ronnica

science - chemistry
Some heat is supplied to a mixture of ice and liquid water in a closed container and the contents of the container are thoroughly mixed. If, after the addition of heat, both ice and liquid water remain: A) the temperature of the system will increase B) the vapor pressure will ...
Monday, December 27, 2010 at 12:43am by S

Science
Consider the isothermal expansion of 4.50 mol of an ideal gas at 450 K from an initial pressure of 12.0 bar to a final pressure of 2.75 bar. Describe the process that will result in the greatest amount of work being done by the system and calculate work Describe the process ...
Tuesday, January 25, 2011 at 3:28am by Katherine

physics
The sound level in decibels is typically expressed as β = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is β = 20 log (P/P0), where ...
Wednesday, November 16, 2011 at 6:30am by maria

physics
The sound level in decibels is typically expressed as β = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is β = 20 log (P/P0), where ...
Wednesday, November 16, 2011 at 6:34pm by melisa

physics
The sound level in decibels is typically expressed as β = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is β = 20 log (P/P0), where ...
Thursday, November 17, 2011 at 5:51am by maria

chemistry hw
SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied ...
Sunday, February 19, 2012 at 6:19pm by Ariel

structure / physic
1. Aquarium (Retaining Buttresses) Background: In a liquid, pressure develops from the weight of the liquid above any point. That pressure is called Hydrostatic pressure and acts equally in all directions. The pressure at any given depth is given by the following formula: p = ...
Monday, September 13, 2010 at 10:37pm by katherine

Physics
The atmosphere of Mars exerts a pressure of only 600 Pa on the surface and has a density of only 0.02 kg/m3. (a) What is the thickness of the Martian atmosphere, assuming the boundary between atmosphere and outer space to be the point where atmospheric pressure drops to 0.01% ...
Monday, November 7, 2011 at 3:39am by mymi

chemistry
A 8.00 L cylinder containing SF6 at a pressure of 0.400 atm is connected by a valve to 91.0L cylinder containing 02 at 342 torr pressure. Both cylinders are at 8.00 C. Calculate the partial pressure (torr) of SF6 when the valve is opened and the temperature of the cylinders ...
Sunday, January 27, 2008 at 12:16am by betty

Physics
When you suddenly stand up after lying down for a while, your body may not compensate quickly enough for the pressure changes and you might feel dizzy for a moment. (a) If the gauge pressure of the blood at your heart is 15.02 kPa and your body doesn't compensate, what would ...
Thursday, March 27, 2014 at 4:18pm by Please Help!!!

Physics
At one point in a pipeline, the water's speed is 3.00 and the gauge pressure is 4.00104 . Find the gauge pressure at a second point in the line 11.0 lower than the first if the pipe diameter at the second point is twice that at the first. I've been trying to use Bernoulli's ...
Saturday, January 30, 2010 at 12:36pm by Steph

Chemistry
CO+H2O <--> CO2+H2 kp=0.0611 atm @2000K A reaction mixture initially contains a CO partial pressure of 1334 torr and H2O partial pressure of 1778 torr at 2000K. Whats the partial pressure of CO2 and H2? I got 381 torr for both, but its not correct.
Wednesday, October 6, 2010 at 3:40pm by Anonymous

chemistry
A gas 'x' is collected over water at 17 degree celcius and 750 mm pressure.If the volume of the gas collected is 50 cc then calculate the volume of the dry gas at standard temperature pressure and at 17 degree celcius the vapour of pressure is 14 mm
Wednesday, September 14, 2011 at 10:45am by Samay

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

Chemistry
I have to chane the barometric pressure in my area to ATM. We have to look at the U.S. Weather map that gives the barometric pressure. I live in an area that has shows 1016 for barometric pressure. First is 1016 in millibars or what and secondly how do I convert that to atm so...
Tuesday, May 18, 2010 at 8:35pm by Hannah

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

Physics
An automobile tire is inflated with air originally at 10.0C and normal atmospheric pressure. During the process, the air is compressed to 28.0% of its original volume and the temperature is increased to 36.0C. a) What is the tire pressure? b) After the car is driven at high ...
Monday, May 23, 2011 at 9:33pm by MP

Chemistry
How do I find the total vapor pressure of a solution of benzene (mole fraction 0.350, vapor pressure at 25 degrees = 12.7 kPa) in toluene at 25 degrees. (vapor pressure of toluene at 25 degrees = 3.79 kPa)
Wednesday, December 19, 2007 at 5:43am by Jaden

Chemistry....help
If 0.500L of dry N2 was bubbles into an inverted flask through water to saturate it at 25.0C, what would be the total volume at the lab atmospheric pressure. Our pressure was : 757.5 mmHg
Tuesday, July 3, 2012 at 9:19am by Ally

Chemistry
explain why a sealed bag of potato chips "puffs out" (increases in volume) if taken from sea level to a high mountain pass. I know this has to do with pressure.. so is it because the higher up you go, the less pressure there is? Thanks!
Wednesday, January 16, 2013 at 6:27pm by Sara

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