Tuesday
March 31, 2015

Search: pressure

Number of results: 7,806

chemistry(check my work)
The initial pressure for the compounds involved in the reaction displayed were determined to be P(SO2(g)) = 0.5932 atm, P(O2(g)) = 0.4886 atm, P(SO3(g)) = 0.09287 atm. Calculate the value of the equilibrium constant (Kp) at 1000 K if the equilibrium pressure of O2(g) was 0....
April 5, 2010 by bme1

phsicsy
a liquid with density of 1.36*10^3 kg/m^3 through two horizontal sections of round tubing joined end to end. in first section, diameter of the tubing is 10cm and the flow speed is 230cm/s and the pressure is 1.3*10^5, the diameter is 6 cm a the cross sectional area in each ...
February 7, 2013 by hunter

CHEMISTRY
We have this following gas equilibrium : H2 + Cl2 <==> 2HCl + 184 kJ then predict the following to know Le chatlier's prediction 1) adding Cl2 2) removing HCl 3) elevation of pressure 4) lowering of the temperature 5) removing H2 and lowering pressure 6) adding catalyst ...
July 7, 2014 by MAD

physical science
need help unscrambling these words sperruse ster nertlaim pressure http://www.ssynth.co.uk/~gay/anagram.html rest what is a g-spot Pressure Rest
December 12, 2006 by nancy

chemistry
One mole of each of the following compounds is strongly heated and any gas produced is collected at room temperature and pressure. From which compound is 24dm3 of gas likely to be collected? (One mole of any has occupies 24dm3 at room temperature nd pressure) A. MgCl2 B. MgCO3...
August 12, 2011 by mimzymo

Physics HELP!!!!!!!!
Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a negligible mass. The area of the piston is 3.06 10-2 m2, and the pressure outside the cylinder is 1.02 105 Pa. Heat (2109 J) is ...
April 21, 2007 by Mary

chemistry
when pressure decreases what happens with the boiling point, it decreases, increases or stays the same? I read the book (the example used is water) were it says that if vapor pressure is less than the pressure pushing down on the surface the bubbles formed collapse; but when ...
May 23, 2007 by Fabiola

Science
When scientists record the volume of a gas, why do they also record the temperature and the pressure? Because the P and T affect the volume of the gas. A measure of matter is mass, to get the mass of gas one must know volume, temperature, and pressure. The density of a gas is ...
October 28, 2006 by Electra

holy name university
the pressure of a mixture of nitrogen,carbon dioxide and oxygen is 150 kPa.Wat is the partial pressure of oxygen if the partial pressures of the nitrogen and carbon dioxide are 100 kPa and 24 kPa,respectively?
November 27, 2010 by january

chemistry
17 liters of a gas is at an initial temperature of 67 degrees C and a pressure of 88.89 atm, what will be the pressure of the gas if the tempetature of the gas is raised to 94 degrees C and the volume of the gas is decreased to 12 liters? 177 atm 36.3 atm 108 atm 136 atm 219 atm
December 5, 2011 by Anonymous

Physics
I once was given a metal whiskey flask for being in my cousins wedding. When it got dented, I put in 1 gram of H2O (initially 21C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the flask had a rectangular ...
March 19, 2014 by SumSum

physics
I once was given a metal whiskey flask for being in my cousins wedding. When it got dented, I put in 1 gram of H2O (initially 21C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the flask had a rectangular ...
March 20, 2014 by sumsum

physics
I once was given a metal whiskey flask for being in my cousins wedding. When it got dented, I put in 1 gram of H2O (initially 21C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the flask had a rectangular ...
April 2, 2014 by mike

Chemistry
Question: Antimony (V) chloride, SbCl5, dissociates on heating to SbCl5(g)goes to SbCl3(g)+ Cl2(g). A closed 3.50 L vessel initially contains 0.0125 mol SbCl5. what is the total pressure at 248 degree's C when equilibrium is achieved? The value of Kc at 248 degree C is 2.50E-2...
February 25, 2009 by eliz

Chemistry
I'm having trouble getting the right answer for a problem, I'm hoping that by posting my work someone can help me figure out where I've gone wrong. A two-liter soft drink bottle can withstand a pressure of 5 atm. Half a cup [approximately 120 mL) of ethyl alcohol C2H5OH, (d= 0...
December 31, 2006 by Alexandria

science
If the inner core reaches temperatures exceeding 6000c, in what phase/state of matter would these matters exist? A. gas; the temperature is so great that the atoms vaporize B. solid; the pressure is so great that the atoms are forced together C. liquid; the temperature exceeds...
May 22, 2009 by Lisa

Chemistry
I forgot in my previous question to say 1014 millibars. The question is I live at 1014 millibars for barometric pressure and temp. is 61 degrees Fahrenheit. I have an imaginary balloon that contains 22 grams of CO2-what is the volume in liters of the balloon using the gas ...
April 21, 2010 by Robert

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

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

P. Chemistry
Can anyone direct me on how to solve this problem? All of the variables are makin my head spin--not sure how to organize them. If you can give equations to use that would help.Thnx! 1 L of an impure water solution has a freezing point of -11 C. Which of the following is the ...
March 7, 2010 by Tommy

Chemistry(Please help)
The vapor pressure of diethyl ether is 463.57 mm Hg at 25 degrees celsius. How many grams of aspirin C9H8O4, a non volatile nonelectrolyte (mw=180.1g/mol), must be added to 216.7g of ether to reduce the vapor pressure to 453.74 mm Hg. Ether=74.12g/mol so I did 463.57 - 453.74...
February 19, 2012 by Hannah

Chemistry
A sample of iron(II) sulfate was heated in an evacuated container to 920 K, where the following reactions occurred. Reaction (a): 2 FeSO4(s)--> Fe2O3(s) + SO3(g) + SO2(g) Reaction (b): SO3(g)--> SO2(g) + 1/2 O2(g) After equilibrium was reached, the total pressure was 0....
January 3, 2013 by Cameron

Physics
Oxygen for hospital patients is kept in special tanks, where the oxygen has a pressure of 62.0 atmospheres and a temperature of 293 K. The tanks are stored in a separate room, and the oxygen is pumped to the patient's room, where it is administered at a pressure of 1.00 ...
January 6, 2009 by Z

health part2
The sole activity of the respiratory system is breathing. True False The exchange of gases between the blood and tissue cells is external respiration. True False Air flows in the process of pulmonary ventilation because of pressure differences between the atmosphere and the ...
March 28, 2015 by april

Chemistry (URGENT)
A gas mixture with a total pressure of 770 contains each of the following gases at the indicated partial pressures: CO2 , 249mmHg ; , Ar 114mmHg ; and , O2 174mmHg . The mixture also contains helium gas. 1. What is the partial pressure of the helium gas? 2. What mass of helium...
December 15, 2010 by Ashley

chemistry
For the reaction below, KP = 1.6 106 at 400.0 C. HCHO2( g ) <--> CO( g ) + H2O( g ) A mixture of CO( g ) and H2O(l ) was prepared in a 2.00 L reaction vessel at 25 C in which the pressure of CO was 0.177 atm. The mixture also contained 0.391 g of H2O. The vessel was...
February 4, 2013 by alifa

Chem
. State whether each of the following samples of matter is a gas. If there is not enough information for you to decide, write "insufficient information." (a) A material is in a steel tank at 100 atm pressure. When the tank is opened to the atmosphere, the material suddenly ...
March 30, 2007 by Luis

chemistry
A student generates H2(g) over water using the reaction between zinc and hydrochloric acid Zn(s)+ 2HCl(aq)---> ZnCl2(aq)+ H2(g) Data: Mass of vial and zinc 15.5082 mass of vial 15.3972 mass of zinc 0.111 final burette reading 45.30mL barometric pressure: Patm 100.6kPa ...
November 23, 2011 by Yuli

AP Chemistry
I was wondering if anyone could possible help me with this homework question? The normal boiling point for acetone is 56.5 degrees C. At an elevation of 5300 ft the atmospheric pressure is 630. torr. What would be the boiling point of acetone (deltahvap = 32.0 kJ/mol) at this ...
January 2, 2008 by Jake

Physics
At the start of a trip, a driver adjusts the absolute pressure in her tires to be 2.84 ✕ 105 Pa when the outdoor temperature is 281 K. At the end of the trip she measures the pressure to be 2.95 ✕ 105 Pa. Ignoring the expansion of the tires, find the air ...
November 13, 2014 by Mark

Chemistry
a diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 degrees celcius. What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27 degrees celcius
November 14, 2012 by Lauren

heat
if the absolute pressure of a gas is 550.280 kpa, it's gage pressure is what? http://www.ajdesigner.com/phppressure/fluid_pressure_equation_absolute_gauge.php
August 13, 2005 by missy white

Chemistry
If the partial pressure of CO2 is 2.87 atm the soluability in H2O is known to be 4.68 M. What would be the soluability of CO2 in H2O if the partial pressure is increased to 7.60 atm? Assume the temp is held constant. would it work to set up a proportion for this question? if ...
February 4, 2008 by Jake

Chemistry
A gas storage tank has a volume of 350,000 when the temperature is 27 degrees celcius and the pressure is 101 kPa. what is the new volume of the tank if the temperature drops -10 degrees celcius and the pressure drops to 95 kPa? please show work.
February 22, 2010 by Bob

Chem Question?
I answered this question already, but would like you to check if the answer I provided was right. If for some reason my answer was not right please provide me with the right answer. 1)The air in the inner tube of the tire of a racing bike has a pressure of 115 psi. Convert ...
May 5, 2008 by Lisa

Chem/ Calculating Lattice Energy, Vapor Pressure
How do you calculate lattice energy? I have to place the following in order of decreasing magnitude of lattice energy, but I don't know how to do it. KF MgS RbI Is there a formula or some simple way of knowing which has the greatest energy? 2. I also have the same question, ...
December 6, 2012 by Danya

Org. Chem.
A natural product (MW=150) distills with steam at a boiling temperature of 99 degrees Celsius at atmospheric pressure. The vapor pressure of water at 99 degrees Celsius is 733 mm Hg. A) Calculate the weight of the natural product that codistills with each gram of water at 99 ...
November 10, 2009 by CMM

Fluid Mechanics
A large tank supplies air to a converging nozzle that discharges to atmospheric pressure. Assume the flow is reversible and adiabatic. For what range of tank pressures will the flow at the nozzle exit be sonic? If the tank pressure is 600 kPa (abs) and the temperature is 600 K...
March 22, 2009 by Katie

Chem302
I spent half an hr on this question - it doesn't make sense, its saying that water is solute, not solvent...Its due in half an hour!!!!!! PLEASE HELP! What is the vapor pressure of the solvent in an aqueous solution at 25◦C of 0.29 m urea (CO(NH2)2), a nonelectrolyte? ...
February 2, 2011 by ND

PHYSICS
Suppose a distant world with surface gravity of 7.12 m/s2 has an atmospheric pressure of 7.48 104 Pa at the surface. (a) What force is exerted by the atmosphere on a disk-shaped region 2.00 m in radius at the surface of a methane ocean? ________N (b) What is the weight of a 10...
November 8, 2012 by Amy

AP Chem
For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) <--> CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a constant ...
February 26, 2013 by Lisa

Physics
A hot air balloon is hovering at an altitude of 6000 meters. The pilot decides that it is time to descend and turns off the balloon's burners. Once the balloon reaches the ground, the gas inside the balloon occupies 980 m^3 and is at atmospheric pressure. If the pressure of ...
February 18, 2012 by GRISSELL

General Chemistry
A 0.1358g zinc metal reacts completely with Dil HCL to produce 52.20ml of H2(g) at 22.0 degrees Celsius. The hydrogen gas is collected over water at 22.0 degree Celsius and a barometric pressure of 755 mm Hg. The water vapor pressure at 22.0 degrees Celsius is 19.8 mm Hg and ...
September 5, 2011 by Kathy

Physics
A horizontal pipe, 10 cm in diameter, has a smooth reduction to a pipe 5 cm in diameter. If the pressure of the water in the larger pipe is 8.00 104 Pa and the pressure in the smaller pipe is 6.00 104 Pa, what is the flow speed of the water (in m/s) in the smaller pipe? a. 0....
January 17, 2013 by David P.

math
On Saturday, Alberto filled his right rear tire with air at the gas station around the block from where he lives. Three days later the tire pressure in that tire measured 26 psi (pounds per square inch). On the following Saturday, one week after he had originally filled the ...
August 7, 2014 by Jeffery

Chemistry! Please Help!
Lime (CaO) is used to prevent SO2 from escaping smokestacks of coal burning power plants by the formation of solid CaSO42H2O also known as the mineral gypsum. One of the important reactions in the overall process is the dissociation of CaCO3(s). b. If a 12.0 g sample of solid...
February 26, 2015 by Michelle

chemistry garde 11
plases help me.... im really stuck in this question... i have no clue how to do it... please help me oxygen gas generated in the thermal decomposition of potassium chlorate in water. the total pressure of this system was measured to be 762 mmHg and the pressure of water was 22...
January 15, 2011 by Kamal

chemistry
The vapor pressure of pure water at 70C is 231 mm Hg. What is the vapor pressure depression of a solution of 115 g of the antifreeze ethylene glycol, C2H6O2, a nonvolatile compound, in 205 g of water? Use molar masses with at least as many significant figures as the data ...
December 12, 2012 by Brad

FLUID MECHANICS
Air under standard conditions flows through a 5.0 mm-diameter drawn tubing with an average velocity of V = 55 m/s. Assume that the tube is smooth, the air is incompressible and no shear stress occur in the tube. Determine i. the pressure drop in 0.1 m section of the tube using...
May 3, 2014 by ANNA

Chemistry
A balloon filled with 0.01 mol of hydrogen gas is kept constant at 25 degrees Celsius. If the pressure is increased from 1atm to 1.5atm, what is the resulting volume? _______________________________________ C3H8(g) + 5 O2(g)-->3 CO2(g) + 4 H2O(g) A 0.03 mol sample of C3H8 ...
December 21, 2006 by Muffin

Physical Chemistry
A 3 mg sample of an unknown ideal gas is subjected to an adiabatic and mechanically reversible expansion from an initial pressure of 2 atmospheres to a final pressure of 300 torr. Given that gamma for the gas is 1.532 and that the temperature drop achieved in the expansion is ...
September 29, 2008 by Amber

Physical Chemistry4
A 3 mg sample of an unknown ideal gas is subjected to an adiabatic and mechanically reversible expansion from an initial pressure of 2 atmospheres to a final pressure of 300 torr. Given that gamma for the gas is 1.532 and that the temperature drop achieved in the expansion is ...
September 29, 2008 by Amber

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 I was able to get 173.81 for the...
April 28, 2008 by Tasha

Chemistry
The solubility of NH3 in H2O is 518 g/L at a partial pressure of 760.0 torr. a. Calculate the value of the Henry's Law constant for NH3 b. Calculate the solubility of NH3 in H2O at a partial pressure of 225.0 torr.
December 6, 2011 by JD

Fluid Mechanics
The components and their dimensions of a hydraulic jack are shown in the figure. The specific gravity of the fluid in the jack is SG=0.8. A force F=400 N is applied at the left end of the handle, which is hinged at the right end. Determine: (a) The fluid pressure p1 on the ...
June 11, 2012 by Bob

Chemistry
Which of the following statements is incorrect concerning the thermochemical equation below? 2SO3(g)  2SO2(g) + O2(g); H = 198 kJ a. The enthalpy of the reactants exceeds that of the products. b. The reaction is endothermic. c. For the reaction 2SO2(g) + O2(g...
July 2, 2013 by Jessica

Chemistry
Which of the following statements is incorrect concerning the thermochemical equation below? 2SO3(g)  2SO2(g) + O2(g); H = 198 kJ a. The enthalpy of the reactants exceeds that of the products. b. The reaction is endothermic. c. For the reaction 2SO2(g) + O2(g...
July 2, 2013 by Kayla

Physics (pressure)
What is the total mass of the earth's atmosphere? The radius of the Earth is 6.37E6 m, and atmospheric pressure at the surface is 1.013E5 N/m^2 (or Pa). I tried this: 1.013E5 Pa = Mg/ pi(6.37E6)^2 1.013E5 Pa (denominator)= 9.8 M solve for M: I'm coming with different ans from ...
May 3, 2007 by Valerie

chemistry help!!!!!
Consider the following reaction: Find the equilibrium partial pressures of A and B for each of the following different values of Kp. Assume that the initial partial pressure of B in each case is 1.0 atm, and that the initial partial pressure of A is 0.0 atm. Make any ...
March 11, 2012 by student

Chemistry
Mass of an empty flask and stopper is 55.844g. 5mL of an unknown liquid is added and heated in a water bath at 99.7 degrees C. It then cools down. The stopper is removed and then replaced. The weight of all of this is 56.101g. The volume of the flask is 248.1 mL. Barometric ...
October 21, 2014 by Gg

AP Chemistry
1,2-Benzanthracene is a yellow-brown nonvolatile solid with molecular weight 228.29g*mol-1. an 18.2632-g sample of 1,2-benzanthracene is dissolved in 250.0 g of benzene, C6H6. Whta is the vapor pressure of this solution at 25C, in millimeters of mergury, if the vapor pressure ...
March 10, 2014 by Ella

physics
A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised bottle to a needle inserted in the vein . The inside diameter of the 4.8 cm long needle is 0.48 mm, and the required flow rate is 4.9 cm^3 of blood per minute. How high h should the...
November 11, 2010 by ashley

physics
A hydraulic lift has two connected pistons with cross-sectional areas 5 cm2 and 350 cm2. It is filled with oil of density 740 kg/m3. a) What mass must be placed on the small piston to support a car of mass 1400 kg at equal fluid levels? 20 OK HELP: The pressure is constant at ...
November 7, 2010 by Sarah

chem
A flask is charged with 1.596 atm of N2O4(g) and 1.008 atm of NO2(g) at 25C, and the following equilibrium is achieved. N2O4(g)-> 2 NO2(g) After equilibrium is reached, the partial pressure of NO2 is 0.504 atm. (a) What is the equilibrium partial pressure of N2O4? for this...
February 19, 2013 by Hannah

chemistry
1.50 mol sample of helium at a certain pressure and temperature has a volume of 31.4 L. a second sample of helium at the same temperature and pressure has a volume of 42.4 L. Therefore the second sample contains how many moles of helium?
April 30, 2014 by Anonymous

chemistry
Predict the effect of each of the following on the indicated equilibrium system in terms of which reaction will be favored (forward, reverse, or neither) H2(g)+Cl2(g)<=>2HCl(g) +184 kJ A)addition of Cl2 B)removal of HCl C)increased pressure D)decreased temperature E)...
May 23, 2007 by Kristy

Science
Hi Just want to know if water from a 20mm Polyethylene pipe under pressure of 3 bars passes to a 25mm polyethylene will cause a slight increase in volume output with a little drop in pressure? If yes then to obtain this benefit , up to whay size can we go for the second pipe ...
May 6, 2011 by Sudesh CANDEN

One more Chem
One more A helium balloon has a volume of 2.30 L at 23.5 deg C and a pressure of 1.00 atm at sea level. the ballon is released and floats upward. At a certain height the atmospheric pressure is 0.810 atm and the temp is 12. C. What is the volume of the balloon? ????? ??? (P1V1...
July 17, 2007 by Jill

physics
In a student experiment, a constant-volume gas thermometer is calibrated in dry ice (−78.5C ) and in boiling pentane (36.1C). The separate pressures are 0.896 atm and 1.433 atm. Hint: Use the linear relationship P = A + BT, where A and B are constants. What value of ...
December 13, 2014 by shawn

PHYSICS
A copper vat is 10 m long at room temperature (20 degrees C). How much longer it is when it contains boiling water at 1 atm pressure? Air in a balloon does 50 J of work while absorbing 70 J of heat. What is its change in internal energy? A bottle containing 3 kg of water at a ...
February 17, 2011 by Matt

CHEM LAB!!! Must finish!!!
Thanks to DrBob222 for the help, but it only answered a few questions! PLEASE help answer, anyone? This is a chemistry lab on boiling point, and I need some help with these questions!- Thanks! (Info): You are going to take a trip. On this trip you will be stopping at different...
May 30, 2008 by Angel

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

physics
In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0628 of the original volume and a pressure that is 48.2 times the original pressure. What is the temperature of the air after the compression? Ok I know I have the temputure of the engine but how do i...
April 27, 2008 by Tim

Physics
The main water line enters a house on the first floor. The line has a gauge pressure of 1.70 105 Pa. (a) A faucet on the second floor, 6.5 m above the first floor, is turned off. What is the gauge pressure at this faucet? (b) How high could a faucet be before no water would ...
November 3, 2007 by john

chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. independent of the chemical identity of the solute. C. dependent on the ...
October 4, 2010 by jay

CHEMISTRY
The volume of air in a persons lungs is 615 mL at a pressure of 760 mmHG inhalation occures at the pressure in the lungs drops to 752 mmHG, to wha volume did the lungs expand I got 615*760=V2*752=621 i keep getting 621 and the answer is 620 what i'am i doing wrong
July 24, 2011 by SHARON

Chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. dependent on the mass of solute present. C. independent of the chemical ...
August 8, 2008 by Blair

chem
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. dependent on the mass of solute present. C. independent of the chemical ...
August 8, 2008 by sonia

Chemistry
A mixture of ethyne ( C2H2 ) and methane ( CH4 ) occupied a certain volume at a total pressure of 16.8 kPa. Upon burning the sample to form CO2 and H2O, the CO2 was collected and its pressure found to be 25.6 kPa in the same volume and at the same temperature as the original ...
November 16, 2008 by Fred

chem lab (webwork)
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. independent of the chemical identity of the solute. C. responsible for lowering the vapor pressure of a solution versus the vapor pressure...
April 3, 2010 by UCI studebt

Calculus
When air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation where is a constant. Suppose that at a certain instant the volume is cubic centimeters and the pressure is kPa and is decreasing at a rate of kPa/minute. At ...
October 26, 2010 by Jason

chemistry
calculate the internal energy change for each of the following. a. one hundred(100.)joules of work are required to compress a gas. at the same time the gas releases 23 J of heat. b. a piston is compressed from a volume of 8.30 L to 2.80 L against a constant pressure of 1.90 ...
March 11, 2008 by kathy

AP Chemistry
Part 1 of 3: An apparatus consists of a 2 L flask containing nitrogen gas at 30 degrees C and 758 kPa, joined by a valve to a 11 L flask containing argon gas at 30 degrees C and 49.7 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after ...
February 16, 2014 by Gabriella

Chemistry
Imagine that you have a 7.00 gas tank and a 3.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145 , to what pressure should you fill the ...
September 21, 2008 by George

Chemistry
Imagine that you have a 7.00 gas tank and a 3.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145 , to what pressure should you fill the ...
September 21, 2008 by George

AP Chemistry
What is the value of w (work) when 1.3 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in units of cal I know ...
January 6, 2015 by Ethan

AP Chemistry
The equilibrium constant for the reaction PCl3(g) + Cl2(g)<-> PCl5(g) is 35000 at 760◦C. At equilibrium, the partial pressure of PCl5 was 110 bar and that of PCl3 was 9.98 bar. Calculate the equilibrium partial pressure of Cl2. Answer in units of bar
November 27, 2013 by Gabriella

Chemistry URGENT/DR BOB
Dalton's Law of Partial Pressure consider the following container of helium at 45C. intially the valve is closed. After the valve is opened what is the pressure of the helium gas. your start points are 2.00 atm and 9.00L. after opening the valve you have 3.00 atm and 3.00L. ...
April 1, 2014 by linda

chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. C. independent of the chemical ...
April 7, 2008 by david

calculus
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the volume is 340 cubic centimeters and the pressure is 87 kPa and is decreasing at a ...
October 22, 2009 by claudia

calculus
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the volume is 380 cubic centimeters and the pressure is 89 kPa and is decreasing at a ...
April 1, 2010 by ujkk

Chemistry
Predict the effect of each of the following on the indicated equilibrium system in terms of which reaction will be favored (forward, reverse, or neither) H2(g)+Cl2(g)<=>2HCl(g) +184 kJ A)addition of Cl2 B)removal of HCl C)increased pressure D)decreased temperature E)...
May 18, 2010 by abby

calculus
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the volume is 580 cubic centimeters, and the pressure is 75 kPa and is decreasing at a ...
October 10, 2010 by rg

Calc
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^1.4=C where C is a constant. Suppose that at a certain instant the volume is 670 cubic centimeters and the pressure is 97 kPa and is decreasing at a rate...
July 28, 2013 by Anonymous

physics
How is pressure applied in the following areas 1. Measurement of blood pressure using spygmomanometer. 2.Giving injections 3.Administering intravenous transfusion 4.Giving oxygen in the ward and operation theater 5.Administering blood transfusion 6.Sucking excess blood after ...
February 11, 2014 by Williams

Chemistry
A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 15.00% naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr. I keep getting 168 torr...
September 20, 2014 by Kaitlyn

calc
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the volume is 430 cubic centimeters and the pressure is 89 kPa and is decreasing at a ...
October 29, 2014 by john smit

Chemistry.
Ca(HCO3)2(s) decomposes at elevated temperatures according to the stoichiometric equation Ca(HCO3)2(s)-> CaCO3(s) + H2O(g) + CO2(g) a.) If pure Ca(HCO3)2(s) is put into a sealed vessel, the air is pumped out, and the vessel and its contents are heated, the total pressure is...
November 22, 2010 by Jill

sceince help
The two tables below give the relative-risk of developing a stroke, in relation to blood pressure and body mass index. The data are based on a population of men from the USA. The values in the first table are given in comparison with the total population. The values in the ...
November 6, 2013 by sam ????????????????????

physics
If the relative humidity is 66.8% in the middle of a spring day in auckland when the temperature is 15 degrees celsius, What will the relative humidity be in the evening when the temperature falls to 10 degrees celius (Assume the partial pressure of water in atmosphere remain ...
March 26, 2010 by Steve

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