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July 31, 2014

Search: how many bromine molecules Br2 have a mass equal to 31.8g

Number of results: 85,032

chemistry 1310
The decomposition of nitrosyl bromide is followed by measuring total pressure because the number of moles of gas changes; it cannot be followed colorimetrically because both NOBr and Br2 are reddish brown: 2 NOBr(g) 2 NO(g) + Br2(g) Use the data in the table to answer the ...
January 24, 2011 by shamia

Chemistry
Three balloons filled with three diffferent gaseous compounds each have a volume of 22.4 L at STP. Would these balloons have the same mass or contain the same number of molecules? Explain.
January 3, 2008 by heidi

Chemistry
At a certain temperature and pressure, chlorine molecules have an average velocity of 0.0410 m/s. What is the average velocity of sulfur dioxide molecules under the same conditions?
May 13, 2010 by Kayla

Chemistry
Nitrosyl bromide, NOBr, readily dissociated according to the following equilibrium equation: 2 NOBr (g) ----> 2 NO(g) + Br2 (g) NOBr was placed in a 1.00 L flask at 25.0oC and allowed to dissociated. At equilibrium, 0.17 moles of Br2 are obtained. If NOBr is found to be 34....
April 18, 2013 by GeeGee

Physics
Using the first law of thermodynamics explain why the specific latent heat of vaporisation of water is greater than the specific latent heat of fusion of ice. The first law of thermodynamics (conservation of energy) has nothing to do with why vaporization requires more energy ...
June 25, 2006 by Ishani

math
9x+5greater than or equal to -40 or 7x+3greater than or equal to -11 solve and graph I got the answer of x greater than or equal -5 or x is greater than or equal to -2 as the solution to this equations, but how do i put this into a soltuion set the way that they want it set up...
January 29, 2010 by Jen

chemistry
For the reactions that occurred spontaneously in the individual tables, balance these reactions assuming they are in an acidic solution. Reaction 1: Cu I^- Ag Br^- Reaction 2: Zn Pb Cu Ag Reaction 3: Cl2 Br2 I2 Reaction 1 I 2(aq) Cu2 + (aq) Ag + (aq) Br2 (aq) Reaction 2 Ag + (...
April 15, 2008 by Joseph

Chemistry
At2 26.3C, F2 molecules have a certain value of rms speed. At what temperature would the rms speed of O2 molecules be the same?
October 16, 2011 by Justin

Chemistry
The steps to getting the answer. A certain metal oxide has the formula MO where M denotes the metal. A 39.46g sample of the compound is strongly heated in an atmosphere of hydrogen to remove oxygen as water molecules. At the end, 31.70g of the metal is left over. If O has an ...
August 26, 2010 by Amy~

chemistry
Choose the groups of molecules below in which all the molecules have a net dipole moment. a. SiHCl3, O2, H2O b. HF, H2ClCH2, H2O c. HF, CH3Cl, H2O d. CCl4, HCl, NH3 e. HF, H2O, N2
January 24, 2008 by janet

Chemistry
4 super tough chemistry questions: 1.) Water has a considerably higher boiling point and lower vapor pressure than other molecules of similar or larger molar mass. For example, dinitrogen (N2), methane (CH4), etc. all have lower boiling points and higher vapor pressures than ...
January 21, 2010 by .

Chemistry
I dont really understand these questions and their processes. And I am a bit iffy on redox reactions. For problem 3, can you show a step by step process how to do the problem? Problem 2, I do not fully understand how to do it at all. How would you know the resulted products? ...
April 6, 2014 by Mika

Fun Fact!
Benjamin Franklin complained, "Let the smaller Colonies give equal money and men, and then have an equal vote. But if they have an equal vote without bearing equal burthens, a confederation upon such iniquitous principles will never last long." Franklin was talking about the ...
February 25, 2007 by Jenna

Chemistry
A sealed flask containing 1.0 mole of H (g) and a sealed flask containing 2.0 moles of He(g) are at the same. 2 temperature. The two gases must have equal 1. masses 2. volumes 3. average kinetic energies 4. numbers of molecules
April 12, 2009 by .

Chemistry
A sealed flask containing 1.0 mole of H2(g) and a sealed flask containing 2.0 moles of He(g) are at the same temperature. The two gases must have equal 1. masses 2. volumes 3. average kinetic energies 4. numbers of molecules
April 12, 2009 by .

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Water has the highest boiling point. B. H-O-H and C-O-H bond angles are all equal to 1095. C. Dispersion forces affect all three molecules. D. Two lone pairs of electrons are ...
January 26, 2007 by helppleez

Phsyics
Can someone give me some pointers on calculating the rest energy of a positron (a particle that has the same mass as an electron and equal but opposite charge) ? thanks The rest energy is equal to the mass times the speed of light squared.
May 24, 2007 by Jess

Chemistry Help
The molecules of a certain gas sample at 367 K have a root-mean-square (rms) speed of 261 m/s. Calculate the most probable speed and the mass of a molecule.
December 5, 2012 by Anonymous

chemistry
How would you find the empirical formula for this... a substance was found by analysis to contain 20% by mass calcium and 80% by mass bromine. Would it be CaBr2? This is what I did... 50g Ca * 20 mol Ca/801.56g Ca = .499 mol Ca 80g Br * 80 mol Br/6392.32g Br = 1.001 mol Br 1....
October 29, 2009 by Jamie Marie

ELAC
Consider equation 3A+B=C+D. You react 4 moles of A with 2 moles of B. Which of the following is true? 1) L.R. is one with higher molar mass 2) A is L.R. because you need 6 moles of A and have only 4 moles 3) B is L.R. because you have fewer moles of B than A 4) B is L.R. ...
September 11, 2010 by Melissa

Chemistry
How do you find out the number of moles in a certain amount of grams of a element or compound. After that, how do you find the number of atoms/molecules in that element or compound. Thanks grams/molar mass = # mols There are 6.02 x 10^23 molecules in a mol of anything.
November 30, 2006 by Slice

moles to moles
Two molecules of hydrogen react with one molecule of oxygen to produce two molecules of water. How many molecules of water are produced from 2.0 * 10 23 power molecules of oxygen? How many moles of water are produced from 22.5 moles of oxygen In each case, multiply the number ...
January 24, 2007 by iearn

CHEMISTRY
what is the symbol for chromium (II) sulfate? You mean the formula? CrSO4 yes! thanx!!!!!! do u know how to find the number of molecules or atoms in a mole? The number of atoms in a mole is called Avogadro's number, the value of which is approximately 6.02 10^23. There are 6...
December 4, 2006 by INEEDHELP!!!

Chemisrty
Where can i find drawing of electron dot stuctures for compounds like BR2 and HCN HCN is at the link below. http://dl.clackamas.edu/ch106-01/formulas.htm I couldn't find one for Br2 on line but here is how it will look.   .. .. :Br:Br:   .. .. That is ...
November 29, 2006 by Lance

Physics/ Chemistry please help
The active ingredient in the allergy medication Claritin contains carbon (C), hydrogen (H), chlorine (Cl), nitrogen (N), and oxygen (O). Its molecular formula is C22H23ClN2O2. The standard adult dosage utilizes 1.480 1019 molecules of this species. Determine the mass (in grams...
April 14, 2007 by Mary

chemistry
suppose you have two 1-L flasks one containing N2 at STP the other containg CH4 at STP how do these systems compare with respect to a)number of molecules B)density c)average kinetic energy of the molecules d)rate of effusion through a pinhole leak?
January 26, 2011 by meg

chemistry
Hi I sent this question a few days ago but did not get it answered I think it may have been mixed up in the jumble. Purpose: The purpose of this lab exercise is to construct a table of relative strengths of oxidizing and reducing agents. By completing this exercise, you will ...
April 13, 2008 by Joseph

chemistry
Hi I sent this question a few days ago but did not get it answered I think it may have been mixed up in the jumble. Purpose: The purpose of this lab exercise is to construct a table of relative strengths of oxidizing and reducing agents. By completing this exercise, you will ...
April 13, 2008 by Joseph

Chemistry
For the equilibrium below at 400 K, Kc = 7.0. Br2(g) + Cl2(g) reverse reaction arrow 2 BrCl(g) If 0.90 mol of Br2 and 0.90 mol Cl2 are introduced into a 1.0 L container at 400. K, what will be the equilibrium concentration of BrCl?
March 2, 2010 by James

chem
A hemoglobin molecule (molar mass =65000 g) can bind up to 4 oxygen molecules. In a certain experiment a .085-L solutoin containing 6.0 g of deoxyhemoglobin was reacted with excess of oxygen in a constant-pressure calorimeter of negligible heat capacity. calculate the enthalpy...
October 4, 2008 by Mischa

science
As a result of the law of conservation, during a chemical change the mass of the products is equal to the mass of the ? mass of the products = mass of the reactants.
October 30, 2006 by Hunter

chem-speed at STP
Hi- we were given this question and I have no clue how to figure it out...please help! Which gas molecules have the greatest average speed at STP? [a] SO2( sulfur dioxide) [b] NH3( ammonia) [c] O2( oxygen) [d] N20 (Dinitrogen oxide) Ok, at stp, that means they all have the ...
May 1, 2007 by ty

chemistry
Identify common properties of the molecules in a compound with a liquid crystal phase contain ions contain aromatic groups contain polar groups have long molecules
October 11, 2008 by Anonymous

chemistry
when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After passing through the solution, it contained 16....
September 17, 2012 by Anonymous

chemistry
when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After passing through the solution, it contained 16....
September 17, 2012 by Anonymous

AP Chemistry
So I have the reaction 2HBr(g) <--> H2(g)+Br2(g) I'm supposed to find the equilibrium constant, K, using free energy (G) values. The values in my textbook for G of H2 and Br2 were zero, and the value for HBr(g) was -53.5. So, to find delta G I did products - reactants ...
April 8, 2013 by Casey

Chemistry
Use the data given below to construct a Born - Haber cycle to determine the electron affinity of Br? DH(kJ) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 419 Br2(l) → 2 Br(g) 193 K(s) + 1/2 Br2(g) → KBr (s) -394 KBr(s) → K⁺(g) + Br⁻(g...
December 8, 2012 by Rob

Chemistry
Can hypochlorite ions oxidize bromide to bromine? In acid solutions, yes. That's the old qual test for bromide. Shake a solution of the unknown with NaOCl, this oxidizes bromide to bromine, and the bromine colors the carbon tetrachloride layer (added previously) yellow. Of ...
March 20, 2007 by Raj

science
1. Identify the phase or phases of matter (solids, liquids, and gases) that apply to each statement. More than one phase of matter may apply to each statement. a. Molecules do not move around, but vibrate in place b. Has volume but no particular shape c. Flows d. Molecules ...
January 29, 2013 by raul

chemistry
the thermochemical equation for th edissocation of hydrogen gas into atoms may be written : h2-> 2H delta H 1824.2 what is the ration of the energy yield on combustion of hydrogen atoms to steam to yield ion combustion of an equal mass of hydrogen molecules to steam given ...
March 4, 2012 by Court

Chemistry
NF3 and PF5 are stable molecules. Write the electron-dot formulas for these molecules. On the basis of structural and bonding considerations, account for the fact that NF3 and PF5 are stable molecules but NF5 does not exist
March 23, 2011 by Tyler

Chemistry
What is the mass of 8.25 * 10^19 UF6 molecules?
November 22, 2007 by Huston

CHEMISTRY
What is the mass of 1.75 x 10^24 molecules of NH3?
January 5, 2013 by Joy

physics
A mass on the end of a spring is stretched a distance Xo from equilibrium and released. At what distance form equilbrium will it have (a) velocity equal to half its maximum velocity and (b) acceleratipon equal to half its maximum acceleration ? I understand (b) that's just ...
January 18, 2010 by Kate

Chemistry
Suppose a compound could point in any of two directions in the solid and still have the same energy. How many molecules would there be if the total entropy of a solid sample of this compound was 8.174e-9J/K I used S= klnW and got lnW = 5.92e14. How do i get the number of ...
April 30, 2011 by Jude

Physics
"A rocket with mass 1200kg reaches a speed of 300m/s when an explosion breaks it up into two parts with equal mass, and their speeds have a 25m/s difference. What are the speeds and how much energy is released?" Show all work. Thanks!
February 3, 2008 by Michael

Chemistry
Using a table of standard reduction potentials, determine the best answer to the following questions. a) Which of the following reagents would oxidize Cr to Cr3 , but not Ag to Ag ? Choices: Ca^2+, Br2, Co^2+, Ca, Br^-, or Co. b) Which of the following reagents would oxidize I...
May 4, 2014 by Alexis

Chemistry
Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.) (Input the ...
August 29, 2012 by Amanda

Chemistry 2
What is the predominant intermolecular force responsible for the dissolution of the hydrophilic end of soap in water? Using dashed lines, illustrate where the intermolecular force occurs between atoms in adjacent molecules? Lone pair electrons have been omitted in the ...
June 30, 2013 by Angela

physics
what is thermal equilibrim, and what is thermal energy? what are fluid molecules? does convectin involve the movement of matter in a circular manner only? thermal equilibrium: no net flow of heat in or out. thermal energy: The sum of all the interanal stored energy in the ...
January 29, 2007 by minerva

Chemistry
Which of the following atoms would have the greatest velocity if each atom had the same kinetic energy? Ammonia? Bromine? Hydrogen? Chlorine?
April 13, 2010 by Lee

AP CHEMISTRY
I've got another question. it's similar to this but this time with Kp. Here's the question: For the equilibrium 2IBr(g) <-> I2(g) + Br2(g) Kp = 8.5 10-3 at 150.C. If 0.016 atm of IBr is placed in a 2.5-L container, what is the partial pressure of all substances after ...
February 6, 2012 by Stan3000

Biology(Anatomy&Physiology)
1)Which group of organic molecules makes up your genetic code 2)A substance which tends to resist a change in the pH of a solution is called a 3)Which buffers is the most common in the body 4)Which of molecules is primarily made of CHON 5)Which is the building block or monomer...
October 15, 2008 by Stephanie

chemistry
how many H2O molecules can be formed from 200 H2 molecules and 200 O2 molecules?
October 9, 2013 by Brittney

Biology
Fats are excellent energy storage molecules because a) they have a relatively high ratio of energy storing CH bonds. b)they have a relatively high ratio of energy storing C=O bonds. c)they are hydrophobic and do not easily mix with water. d)they have a relatively high ...
September 13, 2011 by Katy

Physics
In a pulley system, can the force of friction equal the tension in the rope? Let's say there is a mass on a table connected to a pulley system (placed at the corner of the table), while the other mass hangs from the table ... can the force of friction equal the tension? ...
October 17, 2009 by Lisa

science
1. Force exerted on an area is called _____. (1 point) pressure temperature gravity mass 2. The composition of the atmosphere is changing due to _____. (1 point) smog ozone depletion increase in CO2 (carbon dioxide) all of the above 3. The _____ is the layer of the atmosphere ...
September 26, 2012 by Delilah

quemistry
Br2 + Cl2 ---> 2BrCl 1. FIND ALL THE REASONS ESTEQUIOMETRICAS WITH REGARD TO Cl2. 2. all the masses of Cl2 are needed to form 55g of BrCl. 3. all the grams of Br2 are needed to form 38g of BrCl. please I need help for this question for a homework. thanks
March 4, 2011 by leslie

Chemistry (check)
is the following sentence true or false? To determine the number of representative particles in a compound, you count the molecules by viewing them under a microscope.__true______ Most molecules are too small to see with an ordinary microscope. Can molar masses be calculated ...
February 2, 2007 by Chris

Chemistry 314
Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.) (Input the ...
August 30, 2012 by Amanda

chemistry finding moles
I know the formulas to a mole which equals 6.02x10 to the 23rd power but i have no idea what to do with the formula when converting grams to moles visa versa or atoms or molecules, and i have no idea what goes with what as far as what resources you're supposed to use. Some you...
April 14, 2011 by Jessica

Final Exam- Honors Physical Science
how can you determine the number of protons, electrons,neutrons, atomic number, and the atomic mass of an element using the periodic table? Atomic mass is given in the table, as well as the atomic number and atomic mass number. Atomic number is the number of protons, which is ...
June 4, 2007 by Kate

chemistry
Explain each of the following observations in terms of the electronic strucutre and/ or bonding of the compunds involved. (a)At ordinary conditions, HF( normal boiling point=20C) is a liquid, whereas HCl(normal boiling point=-114C) is a gas. (b)Molecules of AsF3 are polar, ...
January 29, 2008 by anonymous

Chm
Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.
October 10, 2008 by Karina

College Physics II (Calc-Based)
In state-of-the-art vacuum systems, pressures as low as 1.00 x 10^-9 Pa are being attained. Calculate the number of molecules in a 1.90-m^3 vessel at this pressure and a temperature of 35.0C. Okay. So I know I have to use the Ideal Gas Law, PV = nRT, I then transformed it ...
August 29, 2013 by Andrew

Chemistry-Please help
Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules. A)What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.
October 15, 2009 by Rose

help!! organic chemistry
Write the mechanism for the reactions of 1) (E)-3-hexene and bromine and 2) (Z)-3-hexene and bromine in dichloromethane. Assign R,S configuration for each of the products and determine whether they are related as enantiomers or identical. I know how to write the mechanism for...
February 1, 2009 by jenny

applying stoichiometry
10.0 g aluminum reacts with 66.5g bromine to form 65.0g aluminum bromide. determine the limiting reactant and calculate the theoretical and percent yield. once the reaction has occured as completely as possible, what mass of the excess reactant is left?
February 5, 2012 by danielle

Chemistry
What is the mass in grams of 1.02X10^24 molecules of NaCl?
March 11, 2008 by J

Math
The mass of the solid inside the sphere: x^2+y^2+z^2=1, above the xy plane and below the cone z=SqRT(x^2 + y^2. It's mass density is equal to the square of a distance from the origin, setup in both spherical and cylindrical coordinates. I don't have to evaluate, but i still ...
December 8, 2010 by Justin

Physics
Estimate the number of h20 molecules in a human body of mass 80.2 kg. Assume that, on average, water makes up about 62 % of the mass of a human body.
November 15, 2012 by Anonymous

Chemistry
Can some please check my answers for the following questions? THANK YOU. 1)The chemical formula for aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin? ANSWER: 45 g 2)The gram molecular mass of oxygen is. ANSWER: 16.0 g 3)What is the mass, in grams, of 3.01 x 10^23 ...
August 1, 2007 by anonymous

chemistry
Br2 + Cl2 ----> 2BrCl all estequiometicas con respecto a Cl2? cuantos moles de Cl2 se necesitan para formar 55g de BrCl? cuantos gramos de Br2 se necesitan para formar 38G de BrCl? Gracias,
March 4, 2011 by leslie

chemistry
Purpose: The purpose of this lab exercise is to construct a table of relative strengths of oxidizing and reducing agents. By completing this exercise, you will see how more extensive tables of relative strengths of oxidizing and reducing agents have been developed. Procedure: ...
April 12, 2008 by Joseph

Abnormal psychology
what are the tenets of pharmacology I found more then three "basic tenets of pharmacology" online: The dose should be no larger than that necessary for the desired effect The drug molecules must get so close to the cellular molecules that the function of the latter is altered ...
December 16, 2006 by Carol

chemistry
What is the lattice energy of NaBr? heat of formation of NaBr = -362 kJ/mol heat of sublimation for Na = 107.30 kJ/mol ionization energy for Na = 496 kJ/mol bond dissociation energy for Br2 = 190 kJ/mol electron affinity of Br = -325 kJ/mol heat of vaporization for Br2 = 30.90...
December 4, 2010 by chemistry

biology
Hello, I have a question. For one molecule of glucose are there six CO2 molecules released during cellular respiration? I'm looking at the kreb/ citric acid diagram and I'm not sure if it is four or six CO2 molecules being released. I'll appreciate your response. Thanks.
March 6, 2008 by Bizzy

chemistry
The boiling points of the hydrogen halides are listed below. HF 19C HCl 85C HBr 67C HI 35C Which of the following accounts for the relatively high boiling point of HF? 1. HF has the strongest HX bond. 2. HF molecules form hydrogen bonds. 3. HF molecules have the ...
June 26, 2010 by Mody

Chemistry
. For the gas reaction at low pressure 2NOBr 2NO + Br2 H = +61.1 kJ which of the following statements are true? a) Adding more Br2 shifts reaction to the right b) Removing some NOBr shifts reaction to the left c) Increasing temperature shifts reaction to the right d) ...
September 29, 2009 by Ava

AP Chemistry
1. Equilibrium 2SO3(g) <--> O2(g) + 2SO2(g) A 3.21g sample of sulfur trioxide is placed in a 2.25 L cylinder and allowed to reach equilibrium at a constant temperature of 500 , as shown in the above equation. Analysis shows 1.23 X 10^-2 mol of sulfur dioxide at ...
April 10, 2007 by anonymous

science
Posted by Josh on Saturday, March 17, 2007 at 10:58pm. How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? For Further Reading science - DrBob222, Saturday, March 17, 2007 at 11:07pm 1. Write the ...
March 18, 2007 by Josh

chemistry
Determine the overall orders of the reactions to which the following rate laws apply: a. rate = k[NO2]^2 b. rate = k c. rate = k[H2][Br2]^1/2 d. rate = k[NO]^2[O2] I think the answers are: a. Second Order b. Zero Order c. First Order for H2 and One-half order for Br2 d. Second...
July 18, 2010 by Sara

CHEMISTRY
CALCULATE THE MASS OF 8.37X10TO THE 25 MOLECULES OF DINITROGEN TETRAHYDRIDE
September 28, 2008 by DANIEL

Chemistry
What is the mass, in grams, of 4.56 1023 molecules of aspirin, C9H8O4?
June 1, 2010 by Anita

Missouri
Calculate the mass of 2.50 x 104 molecules of nitrogen gas?
February 27, 2011 by John

chemistry
What is the mass (in grams) of 9.81 1024 molecules of methanol (CH3OH)?
October 12, 2012 by Anonymous

Chemistry
How many moles of H atoms are there in 21.66 g of Mg(OH)2? What is the mass of F (in g) in 8.03 x 1023 BF3 molecules
February 3, 2013 by Shanon

chemistry
What is the mass, in grams, of 7.401020 molecules of caffeine, C8H10N4O2
July 24, 2013 by fatima

Chemistry
In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B 2A ---> 3B How many molecules of substance B are produced when 27.9 g of substance A reacts? the molar mass of substance A is 24.7 g/mol STEP 1: convert the mass of A to moles...
January 22, 2011 by Mark

AP Chem
which would be the limiting reagent in the reaction: 2H2(g) + O2(g) => 2H2O(g) 1. 50 molecules of H2 or 2. 50 molecules of O2
January 31, 2008 by gus

Chemistry
So the water molecules fit in between the alcohol molecules? or do they attach to the structures?
September 15, 2010 by Ana

Chemistry
The initial pressure for the compounds involved in the reaction shown were determined to be P(Br2(g)) = 0.5417 atm, P(Cl2(g)) = 0.6962 atm, P(BrCl(g)) = 0.3442 atm. Calculate the value of the equilibrium constant (Kp) at 1000 K if the equilibrium pressure of Cl2(g) was 0.7246 ...
April 7, 2010 by Amphee

physical science
can water dissolve polar molecules or nonpolar molecules
May 19, 2011 by britt

entropy change (chem)
determine the entropy change for the displacement reaction represented by the following equation : Cl2 + PbBr2 -> PbCl2 + Br2 Cl2 = 223.066 delta S PbBr2 = 182.7 delta S PbCl2 = 131.3 delta S Br2 = 152.231 delta S
June 8, 2010 by Capella

chemistry
which of the following would be the limited reagent in the reaction shown below there are 50 molecules of O2 and 50 molecules of H2
July 29, 2008 by natasha

chemistry
Assuming that there is an adequate supply of phosphorus atoms, how many P2O5 molecules can be made from 20 molecules of O2 ?
August 23, 2010 by Anonymous

chemistry
1.5x10^7 molecules of hydrogen sulfate. find the number of grams for the molecules listed
February 8, 2012 by kate

SCIENCE 1
The van der waals equation incorporates corrections to the ideal gas in order to account for the properties of real gases one of the correcctions accounts for A.attractions between molecules B.the quantum behavior of molecules C.that average kinetic energy is inversely ...
May 11, 2010 by Dave

college math for teachers
Use the following sets to complete the givien statements in as many ways as possible. a= a,b,c,d b= e,f c=b,a,c,d d= 1,2,3,4 A. Sets _ and _ are not equivalent and not equal B. Sets _ and _ are not equivalent but are equal. C. Sets _and _ are equivalent but not equal D. Sets _...
January 10, 2010 by Sueann

Math Check
Solve the inequality. So i have done this problem at least three times and I keep getting the same answer. But in the back of the book the correct answer for this problem is x<or equal to 5 This is what I did & my answer dosen't match the one in the back of the book: -9(x-3...
August 25, 2010 by Heather

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