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September 3, 2015

Search: A gaseous mixture of and contains 36.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 565 ?

Number of results: 55,759

Physics
Pressure = weight density depth Calculate the water pressure at the bottom of the 50-m-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units
March 27, 2014 by James

chem
A 5.2 litre baloon at 900 torr of pressure. If the temp is kept constant and the pressure is reduced to 200 torr what is the voume in the balloon? Is this a trick question? My instinct is to say the volume is the same, 5.2 litres.
February 4, 2015 by Roland

Chemistry
Why is motor oil a homogeneous mixture? Consider removing a spoonful of oil from a freshly opened can. Now remove another spoonful. Both will contain the same thing. That is homogeneous. A chocolate chip cookie, for example, is not homogeneous because we can break off a piece ...
September 9, 2006 by John

chemistry
a 2 l gas bulb contains 4.07*10^23 N2 molecules. If the pressure is 3.05bar, what is the rms speed of the N2 molecules? What is the temperature?
January 23, 2011 by brandie

physic
Given: Compressor speed is 1500rpm. The compressor has a bore of 3.125 in, a stroke of 3.26in and a connecting rod crank ratio to 3.5. Inlet pressure is atmospheric 14.7 psia, peak cylinder pressure is 132psia, and mean active pressure mep is 26psia. Flow is 8.9 cfm at mep, ...
August 12, 2012 by zenden

air pressure
two diffrent unitsused to measure air pressure
September 14, 2009 by tymera

Chemistry
what volume of oxygen gas measured at 25C and 760 torr is required to react with 1.0L of methane measured under the same conditions of temperature and pressure?
March 24, 2012 by Mitch

math
The owner of a candy store want to sell, for $6 per lb, a mixture of chocolate-covered raisina, which usually sells for $3 per lb, and chocolate-covered macadamia nuts, which usually sells for $8 per lb. They have 40 lbs of raisins. How many lbs of the nuts should be mix with ...
September 23, 2012 by Anonymous

Chemistry
The vapor pressures of ethanol (C2H5OH) and 1-propanol (C3H7OH) are 100 mmHg and 37.6 mmHg, respectively. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propanol at 35 degrees Celsius over a solution of ethanol in 1-propanol, in which the mole ...
March 18, 2010 by Arnold

physics
A fountain sends water to a height of 116 m. What is the difference between the pressure of the water just before it is released upward and the atmospheric pressure? (The density of water is 1000 kg/m2.)
April 16, 2011 by HELP!!!!

chemistry
Before 1982 the US Mint cast penny coins from a copper and zinc mixture. If a 1980 penny weighs 3.051g and contains 0.153g zinc, what is the percent of copper in the coins?
January 26, 2011 by Twynna

chemistry
Before 1982 the US Mint cast penny coins from a copper and zinc mixture. If a 1980 penny weighs 3.051g and contains 0.153g zinc, what is the percent of copper in the coins?
January 26, 2011 by Twynna

Physics
A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.00 atm at 20.0oC. The round part of the tank has a radius of 10.0 cm, and the gas is supporting a piston that can move up and down in the cylinder without friction. (a) What is the mass of this...
December 6, 2014 by Lan

Chemistry
does oxyanion contain oxygen? I think it contains oxide, but I'm not sure about oxygen. Thanks in advance!
April 8, 2010 by Carla

Chemistry
Nitrogen Oxides, NOx (mixture of NO and NO2). The NOx in the atmosphere is slowly broken down to N2 and O2 in a first-order reaction. The average half-life of NOx in the smokestack emissions in a large city during daylight is 3.9 hours. (a) Starting with 1.50 mg in an ...
June 28, 2012 by Robert

Chemistry
I recently performed an experiment in which magnesium oxide formed. I have to find out the simplest whole number ratio of Mg atoms to O atoms. How do I go about doing this? * Chemistry - DrBob222, Tuesday, October 13, 2009 at 11:19pm Mass MgO - mass Mg initially = mass oxygen ...
October 14, 2009 by Anonymous

college algebra
A store sells cashews for $5.00 per pound and peanuts for $1.50 per pound. The manager decides to mix 30 pounds of peanuts with some cashews and sell the mixture for $3.00 per pound. How many pounds of cashews should be mixed with the peanuts so that the mixture will produce ...
August 5, 2014 by addy2017

CHEMISTRY
For the following reaction at equilibrium, indicate if the equilibrium mixture contains mostly products, mostly reactants, or both products and reactants. 2H20(g)-><-2H2(g)+O2(g) kc+4x10-48
May 6, 2012 by robyn

Chemistry-Explanation Please
Oxygen gas can be generated by heating KClO3 in the presence of some MnO2. 2KClO3 → 2KCl + 3O2 If all the KClO3 in a mixture containing 1.00 g KClO3 and 0.25 g MnO2 is decomposed, how many liters of O2 gas will be generated at T = 24.0C and P = 755.6 torr?
November 1, 2012 by Kwame

Chemistry
I don't know exactly how to start this question: A sample gas contains 2.95 x 10e24 molecules. The sample is 21.0% oxygen. Calculate volume of oxygen in liters assuming oxygen has a density of 1.308 g/L. Please help me how to do this. I have been stuck and still trying to ...
October 26, 2012 by Elizabeth

chemistry
How much volume in liters will 100.0 g of oxygen occupy at 100 0C and 100 atm pressure?
September 25, 2009 by me

chemistry
How much volume in liters will 100.0 g of oxygen occupy at 100 0C and 100 atm pressure?
September 27, 2009 by Anonymous

chem
Yesterday, Jason had a sample of helium indoors (T = 23oC) in a sealed container, with a pressure of 760 mm Hg. He got bored and took the container outside, where the temperature was a blistering 35oC. He calculated the new pressure to be 750 mm Hg. Jason knew that this answer...
December 2, 2007 by Tom

College chemistry
A farmer applies 13.50 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. Fifteen (15.0%) percent of the fertilizer washes into a river that runs through the farm. If the river flows at an average rate of 0.265 cubic feet per second. What is the ...
January 22, 2013 by Unknown

Chemistry
A farmer applies 1400.0 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. fifteen (15.0%) percent of the fertilizer washes into a river that runs through the farm. If the river flows at an average rate of 0.410 cubic feet per second, what is the ...
August 30, 2013 by Mohammed

Chemistry
A farmer supplies 1250.0 kg of a fertilizer that contains 10& nitrogen to his fields each year. Fifteen percent of the fertilizer washes into a river that runs through the farm. If the river flows at an average rate of 0.165 cubic feet per second, what is the additional ...
September 6, 2014 by David Cardenas

Chemistry
How much volume in liters will 100.0 g of oxygen occupy at 100 degrees celcius and 100 atm pressure?
February 3, 2008 by Tammy

Chemistry
A mouse is placed in a sealed chamber with air at 755.0 torr. This chamber is equipped with enough solid KOH to absorb any CO2 and H2O produced by the mouse. The gas volume in this chamber is measured to be exactly 1.70 L, the temperature is held constant at 305 K. After two ...
November 6, 2014 by Kales

physics
A 350g glass beaker contains 500g of water at a temperature of 10.0C. If 400g of ethyl alcohol at 35C is subsequently poured into the beaker and the water and alcohol mixture is thoroughly stirred, what is its equilibrium temperature?
March 22, 2012 by Paige

Chemistry
When F2(g) (0.02028 mol/L) and 0.02028 mol/L of Cl2(g) in a 460.0 L reaction vessel at 774.0 K are allowed to come to equilibrium the mixture contains 0.02898 mol/L of ClF(g). What concentration (mol/L) of F2(g) reacted? F2(g)+Cl2(g) = 2ClF(g)
October 4, 2013 by plzprovidetheanswer

Physics
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant pressure until its ...
November 16, 2012 by Erika

physics
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant pressure until its ...
November 18, 2012 by chelsea

Chemistry
A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 ∘C the osmotic pressure produced by the solution was 0.138 atm. What is the ...
June 27, 2014 by Al

chemistry
A sealed flask contains 0.40 g of water at 28 deg. celsius. The vapor pressure of water at this temperature is 28.36 mmHg
September 6, 2009 by jeff

chemistry
mass= 3.8721g temperature= 102 degrees Celsius volume= 156ml atmospheric pressure= 755.0 mm Hg calculate the molar mass using the ideal gas law
November 23, 2010 by VICKY

physics- vry urgent
An ideal monatomic gas initially has a temperature of 333 K and a pressure of 7.15 atm. It is to expand from volume 581 cm3 to volume 1360 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
April 9, 2009 by nirali

General Chemistry
Answer Check... A 3.00L sample of gas was collected over water at 45 degrees Celsius. The wet gas exerts pressure of 1.50atm. When dried the sample occupies 1.80L and exerts a pressure of 1.77 atm at 80.0 degrees Celsius. What is the vapor pressure of water at 45 degrees ...
September 5, 2011 by Kathy

phyics
Ethyl alcohol has been added to 190 {\rm mL} of water in a container that has a mass of 140 {\rm g} when empty. The resulting container and liquid mixture has a mass of 450 {\rm g}. What volume of alcohol was added to the water? Express your answer using two significant figures.
December 4, 2011 by please help

Chemistry 101
A bag contains a mixture of copper and lead BBs. The average density of the BBs is 9.60g/cm cubed. What is the percent of copper and the percent of lead?
February 12, 2012 by Haley

chem 1
9.70 grams of nitrogen gas are allowed to react with 5.44 grams of oxygen gas. What is the maximum amount of nitrogen monoxide that can be formed? What amount of the excess reagent remains after the reaction is complete?
October 21, 2012 by kim

Physics
A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal equilibrium with the ...
November 21, 2010 by Carl

chem
hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecule and contains .340 percent iron by mass. calculate the molar mass of hemoglobin! thanks! :)
August 16, 2012 by skye

Chemistry
The total volume of seawater is 1.5 times 10 to the twenty- first power L. Assume that seawater contains 3.1 percent sodium chloride by mass and that it's density is 1.03 g/mL. Calculate the total mass of sodium chloride in kilograms and in tons. ( 1 ton = 2000 lb. ; 1 lb. = ...
August 25, 2012 by Brooklynn

chem.
A closed gas system at 855K has a colume of 6060mL and pressure of 935 mmHg. If the temp. is increased to 950.0 celcius , the volume decreases to 3910mL. What is the resulting pressure? Express answer in kPa. Is 202,000,000kPa right?
March 14, 2008 by aaaaa

physics
an ideal monatomic gas is allow to expand slowly until its pressure is reduced to exactly half its original value. By what factor those the volume changes if the pressure is (1)isothermal (2)adiabatic. Please is the answer suppose to be a calculation or an explanation
March 8, 2012 by Joanna

Chemistry
80.0 grams of KBr is mixed with sufficient water to prepare 1865 mL of solution. This solution is then mixed with 46.3 mL of 0.425 M KCl solution. 12 mL of this mixture is subsequently added to 61.0 mL of distilled water. Calculate the molarity of K+ ions in the final mixture...
March 1, 2011 by Christian

Chemistry
How much volume in liters will 100.0 grams of oxygen occupy at 100 degrees celcius and 100 atm pressure?
February 15, 2008 by Mark

chemistry
Under an O2 pressure of 1.00 atm, 28.31 mL of O2 dissolves in 1.00 L H2O at 25 degrees. Determine the molarity of O2 in an aqueous solution at equilibrium with air at normal atmospheric pressure. The volume percent of O2 in air is 20.80 \%. (Have no idea how to go through with...
February 20, 2010 by david

chemistry
Under an O2 pressure of 1.00 atm, 28.31 mL of O2 dissolves in 1.00 L H2O at 25 degrees. Determine the molarity of O2 in an aqueous solution at equilibrium with air at normal atmospheric pressure. The volume percent of O2 in air is 20.80 \%. (Have no idea how to go through with...
February 20, 2010 by david

physics
a bus engine can operate at very high temperatures . if one of the cylinders has a volume of 1 litre and is initially at 25C and atmospheric pressure , what is the temperature when the gas in the cylinder is reduced to a volume of 100cubic centrimeters and pressure of 5000kPa
May 13, 2012 by amanda

Chemistry
You are in a mountain range with atmospheric air pressure of 520 , and you wish to boil some eggs. What is the approximate boiling point of the water at this air pressure? Express your answer as an integer and include the appropriate units.
October 4, 2012 by Sydney

chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at 10...
June 1, 2013 by Anony mous

chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at 10...
June 1, 2013 by Anony mous

Chemistry
Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 29.0 L, onto the floor. Since the boiling point of liquid nitrogen at 1.00 atm is 77.4 K, all the nitrogen ...
July 14, 2010 by Katie

chemistry
I need to write an equation tht takes place at a temp of 400 K and with a catalyst of iron to make ammonia gas from gaseous nitrogen and hydrogen
May 21, 2011 by sheila

Math
One glass of milk has 1/3 chocolate syrup. Another glass that is twice as large as the first glass contains 1/4 chocolate syrup. If you put them together, How much of the new mixture is syrup?
May 6, 2011 by Julianne

Chemistry
The combustion of ethane: 2 C2H6 (g) + 7 O2 (g) ---> 4 CO2 (g) + 6 H2O (g) At teh same temperature and pressure, what is the maximum volume in liters of carbon dioxide that can be obtained from 15.9 L of ethane and 52.3 L of oxygen?
November 6, 2012 by Helpless

CHEMISTRY URGENT!
a sample of oxygen that occupies 1.00 x 10^6mL at 575mmHg is subjected to a pressure of 1025atm. what will the final volume of the sample be if the temperature is held constant? how do uu set up the equation
February 3, 2013 by kacie

chemistry
A sample of oxygen that occupies 1.00x10^6 mL at 575 mm Hg is subjected to a pressure of 1.36 atm. What will the final volume of the sample be if the temperature is held constant? How would I set up this equation?
March 4, 2013 by kate

chem
A sample of oxygen that occupies 1.8 10−6 mL at 582 mm Hg is subjected to a pressure of 1.51 atm.m. What will the final volume of the sample be if the temperature is held constant? Answer in units of mL
May 30, 2014 by reis

chemistry
A sample of oxygen that occupies 2.5 10−6 mL at 508 mm Hg is subjected to a pressure of 1.2 atm. What will the final volume of the sample be if the temperature is held constant? Answer in units of mL
February 25, 2015 by Anna

Chemistry 12
Write an equation showing the relationship between i) the rate of production of oxygen and the consumption of dinitrogen pentoxide ii) the rate of production of oxygen and the rate of production of nitrogen dioxide iii) the rate of consumption of dinitrogen pentoxide and the ...
September 9, 2013 by Amy

Chemistry
Could some please tell me if I did this problem correctly? Assume that at a given temperature, there is 1 g of CO2 gas in a one liter volume. How much mass of O2 would there be at the same temperature, in the same volume? My answer: Step 1) Find the number of moles of carbon ...
October 22, 2009 by Ed

Chemistry
Just having some trouble with this chemistry problem.. Thanks for help! Toxic carbon monoxide (CO) gas is produced when fossil fuels such as petroleum burn without enough oxygen. The CO can eventually be converted to CO2 in the atmosphere. Automobile catalytic converters are ...
January 15, 2013 by Sara

Chemistry
In a 25.8 liter vessel of nitrogen gas that is heated from 10 degrees Celsius to 110 degrees Celsius to reach a final pressure of 17450 mm Hg; how many grams of N2 do you have in the vessel?
April 7, 2015 by Emily

Chemistry --really need help!
I am really struggling with these problems!! A reaction mixture that consisted of 0.20 mol N2 and 0.20 mol H2 was introduced into a 25.0 L reactor and heated. At equilibrium, 5.0% of the nitrogen gas has reacted. What is the value of the equilibrium constant Kc for the ...
February 19, 2010 by Angelica

Chemistry 3A
the pressure of hydrogen gas in a constant volume cylinder is 4.25atm at 0 degrees celsius. what will the pressure be if the temp. is raised to 80 degress celsius? Also do we have to first convert celsius to kelvin?
December 4, 2012 by Gurjot

health supports
blood flow is maintained in the veins by? A.blood pressure B.valves in the veins which prevent back-flow C.muscular pumping action of the vein walls D.partial vacuum in the heart my answer is b
July 17, 2013 by susue

chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015 by Kyle

ap chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015 by Kyle

ap chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015 by Kyle

ap chemistry
calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? P=0.0003 atm. how to solve
January 6, 2015 by an

physics
Lubricating oil, with a relative density of 0.79, flows around a 90 bend. The pipe diameter is 0.45m, and the oil has a pressure head of 7m and the flow is 1.7m3/s. Find the force exerted by the oil on the bend. Oil density = 0.79 X 103 Volumetric mass flow rate = 1.7 m3/s ...
April 2, 2009 by Michel

trig
Suppose that Magnus' blood pressure can be modeled by the following function {{{p(t)=83-18sin(71pi*t)}}} Magnus' blood pressure increases each time his heart beats, and it decreases as his heart rests in between beats. In this equation, p(t)is the blood pressure in mmHg (...
March 23, 2014 by joey

physics
An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
April 21, 2011 by niki

physics
An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
April 21, 2011 by niki

physics
An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
April 22, 2011 by niki

Molar mass
A sample of gas has a mass of 0.580g . Its volume is 119mL at a temperature of 80∘C and a pressure of 743mmHg . Find the molar mass of the gas. I think I got a step wrong in the problem, please help?
April 29, 2015 by Chemistry

Chemistry
If I have the temperature, the pressure and the mass how do I calculate the volume? Thanks Of a gas? PV=nRT The ideal gas law. calculate n from the mass and mol mass.
February 25, 2007 by Laura

chemistry
A scuba diver's tank contains 0.39 kg of O2 compressed into a volume of 2.5 L. Calculate the gas pressure inside the tank at 12C.
April 25, 2010 by Laine

Chemistry
A small cylinder of compressed gas has a volume of 396.6 ml and contains 47.9 g of CO2 at 25C. What is the pressure (atm) inside the cylinder?
March 25, 2013 by Linzy

chemistry
determine the pressure in a 0.34 liter balloon if the temperature is 35 celsius and the balloon contains 0.0233 mol of an ideal gas.
April 10, 2015 by Anonymous

Chemistry
A sample of steam with a mass of 0.552 g and at a temperature of 100 C condenses into an insulated container holding 4.45 g of water at 7.0 C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 19, 2010 by eddie

chemistry
A sample of steam with a mass of 0.552 and at a temperature of 100 condenses into an insulated container holding 4.35 of water at 6.0. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 29, 2012 by amy

Chemistry
Oxygen can be produced in the laboratory by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g) . How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37◦C and 94.9 kPa? The vapor pressure of water at 37◦C is 6.28 kPa. 1. 0.189 ...
November 20, 2012 by Caitlin

physics,plz.....give me answer as soon as possible
a pond of water filled with water apto 60m. 1)write formulato find the pressure of water exerted on the base of pond. 2)calculate the pressure exerted by the water on the base of pond?density of water is 1000kg/m3 3)half of the water was removed from the pond.what could be the...
November 24, 2010 by sweetie

Physics
A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open at the top. Friction is absent. The spring constant of the spring is 4100 N/m. The piston has a negligible mass and a radius of 0.023 m. (a) When air beneath the piston is ...
April 24, 2007 by Mary

chem
posted this question before and wanted to know if I had gotten the right answers. We have to identify the five compunds of H, N, and O described below. For each compound, I have to write a Lewis structure that is consistent with the information given. a.) All the compunds are...
December 3, 2006 by Sam

Physics
A 100-g aluminum calorimeter contains a mixture of 40 g of ice and 200 g of water at equilibrium. A copper cylinder of mass 300 g is heated to 350 C and then dropped into the calorimeter. What is the final temperature of the calorimeter and its contents if no heat is lost to ...
December 2, 2010 by Calvin

Chemistry
What is the total vapor pressure of NaCl solution at 25C with mole fraction of 0.01? (X_NaCl = 0.01) Thanks!!
February 9, 2009 by Andrew

Chemistry
The running engine of an automobile produces carbon monoxide (CO), a toxic gas, at the rate of about .102mol CO per minute. a car is left idiling in a poorly ventilated garage that is 60m long, 4 m wide, and 2.2 m high at 20 degrees C. what will the partial pressure of CO in ...
October 7, 2010 by Missy*

chemistry
Oh my my test is coming up and I have no idea how to do these questions and when I asked my teacher for help he said you should do it yourself.... Thanks! An intermediate step in the production of battery acid, sulfuric acid, invoves the information of sulfur trioxide gas from...
October 7, 2008 by Tri

chem
A solution consisting of isobutyl bromide and isobutyl chloride is found to have a refractive index of 1.3931 at 20oC. The refractive indices at 20oC of isobutyl bromide and isobutyl chloride are 1.4368 and 1.3785, respectively. Determine the molar composition (in percent) of ...
November 11, 2008 by un

chemistry
Subject equilibria Pure ethanoic acid (25.0cm3, CH3COOH), pure ethanol (35.0 cm3, C2H5OH) and pure water (20.0cm3, H2O) were mixed in a sealed flask at room temperature. The flask was placed in a heated water bath and maintained at 323K until equilibrium was established. ...
May 7, 2012 by yaya

chemistry
Consider a mixture of , albumin solution, and starch solutions in a dialyzing bag. The dialyzing bag is then immersed in distilled water. Which of the following actions should be taken to remove the most salt from the mixture? Leave the dialyzing bag in the distilled water for...
October 16, 2013 by mona

Maths
If z=(x^n) f(x/y), where f is an arbitrary function, show that: x(partial z/partial x) + y (partial z / partial y) = nz Can someone please show me how to work it out? Thanks!
February 3, 2010 by Claire

chemistry
A sample of natural gas is 85.2% methane, CH4, and 14.8% ethane, C2H6, by mass. What is the density of this gas mixture at 18.0C and 771 mmHg? Assume ideal gas behavior.
October 31, 2012 by Zoe

science-gas laws
I got 2 questions for ya: 1. Calculate the new pressure of an oxygen tank at 127o C if the tank had 2200 psig at room temperature (22o C)? I used Gay Lussac's law. Here's my work: P1= 2200psi P2= X T1= 295K T2= 400K (2200x295)400= X I got 2983psi Is that correct? 2. Given 320 ...
August 28, 2007 by abby

chemistry
I am having a ton of trouble with this lab question, I do not understand it at all. The question is: Show how the rate of reaction in reciprocal seconds was calculated for the mixture in question 1, using the class average. The mixture in question one is: 3HSO3^- + IO3^- + ...
November 21, 2010 by blue fire

CHEMISTRY
I am having a ton of trouble with this lab question, I do not understand it at all. The question is: Show how the rate of reaction in reciprocal seconds was calculated for the mixture in question 1, using the class average. The mixture in question one is: 3HSO3^- + IO3^- + ...
November 21, 2010 by blue fire

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