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June 26, 2016

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

Number of results: 103,655

Chemistry
Olive oil has a higher viscosity than benzene. Which statement best explains the reason for the difference in viscosity between these two liquids? A. Molecules of olive oil take up a smaller volume than molecules of benzene. B. Fewer intermolecular forces exist between ...
March 17, 2015 by Cortney

AP Chemistry
HBr is mixed with water. Which is the best description of what you would expect to find in the solution? 1. H3O+, Br1−, and water molecules 2. HBr molecules, H3O+, Br1−, and water molecules 3. Br+, OH1−, and water molecules 4. HBr molecules and water ...
September 17, 2010 by Nick

chemistry
HBr is mixed with water. Which is the best description of what you would expect to find in the solution? 1. Br1−, OH1−, and water molecules 2. HBr molecules and water molecules 3. H2Br+, OH1−, and water molecules 4. H3O+, Br1−, and water molecules 5. Br...
September 19, 2012 by cheri

physics problem!!
If the water molecules in 5.70 g of water (H2O) were distributed uniformly over the surface of the Earth, how many such molecules would there be on 1.40 cm2 of the Earth's surface? -Molar mass Hydrogen gas(H2)=2.02 g/mol -Molar mass Oxygen gas (O2) = 32.0 g/mol -Radius of ...
April 9, 2013 by boom

chemistry
Which substances in each of the following pairs would have the greater entropy? Explain. (a) at 75C and 1 atm: 1 mol H2O(l) or 1 mol H2O(g) (b) at 5C and 1 atm: 50.0 g Fe(s) or 0.80 mol Fe(s) (c) 1 mol Br2(l,1 atm, 8C) or 1 mol Br2(s, 1 atm, -8C) (d) 0.312 mol SO2 (g, 0....
March 20, 2009 by H

Chemistry-EQUILIBRIUM
I'm working on this equilibrium homework problem and I'll post all my work. Can you help me please? I'm a little stuck especially on the polynomial. If iodine vapor and bromine vapor are reacted in 15o degree C they form idodine monobromide gas. At 150 degrees C the value of ...
March 19, 2008 by Karen

Chem
The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant. 2HBr(g) <--> H2(g) + Br2(g) Kc=0.322 H2(g) + Br2(g) <--> 2HBr(g) Kc= ?
March 11, 2015 by Jodi

Physics
Two equal-mass stars orbit their centre of mass. The distance between the stars (measured from the centre of mass of each) is 1 AU. What is the period of revolution in years? How much energy would be required to unbind these stars if they each have the same mass as the sun? ...
August 14, 2015 by Jim

chemistry
Determine the entropy change for the following displacement reaction. Cl2(g) + PbBr2(aq) → PbCl2(aq) + Br2(l). DS: (J/K mol) Cl2(g) 223.066; PbBr2(aq) 182.7; PbCl2(aq) 131.3; Br2(l) 152.231
August 6, 2010 by Lily

Chemistry
After 4.00 mol of C2H4(g) and 2.50 mol of Br2 (g) are placed in a sealed 1.0L container, the reaction reaches equilibrium and is written following: C2H4(g) + Br2(g) -> C2H4Br2(g) ... Calculate the equilibrium concentrations of all three substances.
August 9, 2012 by Sarah

Chemistry
A sealed 1.0L flask is charged with .500mol I2 and .500mol Br2 and an equilibrium reaction esues: I2(g)+Br2(g)=2IBr(g) When the container contents achieve equilibrium, the flask contains .84 mol of IBr. What is the value of the eqilibrium constant? (K)
March 21, 2013 by Jonah

Chemistry
At 5000 K and 1.000 atm, 83.00% of the oxygen molecules in a sample have dissociated to atomic oxygen. At what pressure will 99.0% of the molecules dissociate at this temperature?
November 17, 2010 by Anonymous

Chemistry, Thermodynamics
I have a couple questions: 1. When analyzing which has greater entropy, do you look at the larger number or the smaller number? 2. What two things must be met for a reaction to be spontaneous under ALL temperature conditions? 3. If heat is in the products, the equation is ...
August 10, 2007 by Taasha

Chemistry
Why do bromine and iodide have similar chemical properties?
October 22, 2008 by Rachel

Chemistry
a) Which of the following reagents would oxidize Zn to Zn2 , but not Ag to Ag ? Answers are: Co2+ Ca2+ Br2- Br2 Co or Ca b) Which of the following reagents would oxidize Ag to Ag , but not Cl to Cl2? Answers are: Co Br- Br2 Co2+ Ca2+ or Ca
June 2, 2014 by BOB

Chemistry
A nine liter tank has 150 atmospheres of bromine in it at 27C. What is the added mass of the tank due to the gas?
July 30, 2012 by Reid

scince
One molecule of water (H2O) contains two atoms of hydrogen and one atom of oxygen.A hydrogen atom has a mass of 1.0 u and an atom of oxygen has a mass of 16 u, approximately. (a) What is the mass in kilograms of one molecule of water? (b) How many molecules of water are in the...
May 11, 2012 by teja

chemistry
Reaction 1: I2(aq)Cu^+2(aq) Ag^+(aq)Br2(aq) Column 1---Column 2---Column 3---Column 4---Column 5 I-(aq)---X---X---T---T Cu(s)---T---X---T---T Ag(s)---X---X---X---T Br-(aq)---X---X---X---X Reaction of metals and solution of ions Reaction 2: Ag+(aq)Pb2+(aq)Cu2+(aq)Zn2+(aq) ...
April 14, 2008 by Joseph

Chemistry
help please! At 5000 K and 1.000 atm, 83.00% of the oxygen molecules in a sample have dissociated to atomic oxygen. At what pressure will 99.0% of the molecules dissociate at this temperature?
November 17, 2010 by Alyssa

Physics
How many grams of water (H_2O) have the same number of oxygen atoms as 1.0 (mol} of oxygen gas? atomic mass of H is 1 and O is 16, so H2O has a molar mass of 18. Oxygen gas is O2, with a molar mass of 32. So 1.0 mole of oxygen gas has 6.02x10^23 molecules = 12.04x10^23 oxygen ...
November 18, 2009 by ana

AP Chemistry
A 12.5843 g sample of ZrBr4 was dissolved and, after several chemical steps, all of the combined Bromine was precipitated as AgBr. The silver content of the AgBr was found to be 13.2160 g. Assume the atomic weights of silver and bromine to be 107.870 and 79.909 respectively. ...
September 5, 2008 by Steve

SCIENCE Please help
A cloud forms around 45 south latitude and is carried through the atmosphere on the Westerlies. As the water molecules in the cloud move through the atmosphere, which step in the water cycle is most likely to happen next? The molecules cool and eventually condense. The ...
January 25, 2016 by Oscar

pls help me science
A cloud forms around 45 south latitude and is carried through the atmosphere on the Westerlies. As the water molecules in the cloud move through the atmosphere, which step in the water cycle is most likely to happen next? The molecules cool and eventually condense. The ...
January 25, 2016 by Oscar

science chemistry
N2 (g) + 3H2 (g) -> 2NH3 (g) assume 4 molecules of nitrogen and 9 molecules of hydrogen are present. after complete reaction, how many molecules of ammonia are produced. do i go from N to NH3 or H to NH3?
October 5, 2011 by cook

Chemistry
consider the following molecules:SiH4, PH3, H2S. What is similar about these molecules? What is different about these molecules and why?
November 1, 2012 by Bhavna

Chemistry
Thank you for your help. I did want to clarify why you are only calculating the Molar Mass for H2 and not the molar mass for H2O (or even H2O2). I'm not sure why you did this. Please clarify. See below: The following reaction represents the decomposition of hydrogen peroxide ...
October 19, 2010 by Andre

Chemistry
How many carbon dioxide molecules will form when a naptha molecule burns? Thanks Write the equation, then solve it just as we did the problem on water molecules yesterday. Post in detail any questions you have about what to do next.
March 19, 2007 by Jessica

chemistry
Based on the balanced equation C4H8S + 7O2 = 4CO2 + 4H2O + SO2 calculate the number of H2O molecules formed when 39 C4H8S molecules and 287 O2 molecules react?
February 5, 2010 by andy

Chemistry
Of the 3 types of fat, which type of fat would react with the greatest amount of bromine? Least amount of bromine? a. saturated fat b. mono-unsaturated fat c. poly-unsaturated fat
April 2, 2013 by Ashley

Chemistry
Consider a 980-mL container at 133 C in which the pressure of nitrogen oxide is 0.394x106 Pa. a) What mass of nitrogen oxide (in g) is present in this container? b) How many molecules is this? (a)----g (b)-----molecules
May 2, 2010 by write2khin

physics
we can say that the force of gravity is equal to mass times acceleration were the acceleration is equal to gravity sense gravity is an acceleration because of newtons second law force = mass times acceleration hence Fg = mass times acceleration Fg = mass times gravity Fg = mg ...
September 12, 2009 by physics

chemistry
Nitrogen (N2) and hydrogen (H2) react to form ammonia (NH3). Consider a mixture of six nitrogen molecules and six hydrogen molecules in a closed container. Assuming the reaction goes to completion, what will the final product mixture be? number of NH3 molecules? number of N2 ...
September 9, 2009 by grant

chem/phys
Calculate the number of H2O molecules in a human body of mass 66.5 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.) 1
April 25, 2012 by opp

Chemistry
Given the chemical reaction: N2+3H2--->2NH3 If 20 molecules of nitrogen react with 30 molecules of hydrogen to from ammonia, what is the total number of molecules present after the reaction goes to completion?
October 31, 2008 by Songyi

physics
Calculate the number of H2O molecules in a human body of mass 50.6 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)
April 12, 2013 by kira

Physics
Calculate the number of H2O molecules in a human body of mass 65.9 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)
April 27, 2014 by Steve

Chemistry
All of the following are postulates of the kinetic molecular theory of gases except A. The gas molecules are in constant motion. B. The gas molecules are in rapid motion. C. The collisions between molecules are elastic. D. At a constant temperature, each molecule has the same ...
December 9, 2010 by Jake

math
estimate each unit rate.1) 295 words in 6 minutes.find each unit price.then tell which has the lower unit rate. 2) $3.99 for 25fl.oz of detergent or $6.99 for 90 fl.oz of detergent.3) $d/12 hr= $96/8 hr 4. One molecule of nitrogen reacting 3 molecules of hydrogen makes 2 ...
December 21, 2013 by angie

physics
In a gas at standard temperature and pressure, what is the length of the side of a cube that contains a number of molecules equal to the population of the earth (about 6 million people at present)? I know STP is 1 atm and 273K, but I have no clue how to start this problem. Any...
November 19, 2009 by sarah

AP CHEMISTRY
For the reaction I2(g) + Br2(g) 2 IBr(g), Kc = 280. at 150.C. Suppose that 0.590 mol IBr in a 2.50-L flask is allowed to reach equilibrium at 150.C. What are the equilibrium concentrations of IBr, I2, and Br2?
February 6, 2012 by Stan3000

chem
For the reaction I2(g) + Br2(g) 2 IBr(g), Kc = 280. at 150.C. Suppose that 0.570 mol IBr in a 2.50-L flask is allowed to reach equilibrium at 150.C. What are the equilibrium concentrations of IBr, I2, and Br2?
February 20, 2013 by Hannah

Chemistry
An ideal gas differs from a real gas in that the molecules of an ideal gas: have no kinetic energy have a molecular weight of zero have no attraction for one another have appreciable molecular volumes have an average molecular mass I believe the answer is "have no attraction ...
December 23, 2009 by Anonymous

chemistry
At what temperature does the rms speed of O2 molecules equal 475 m/s?
November 5, 2013 by sher

chemistry
Calculate the molar mass of the compound 3.01x10^23 molecules of compound Z have a mass of 9g is it 3.01x10^23molescules x 1mol/6.02x10^23 x Z/1mol = 9g compound Z = 8g thanks in advance
January 11, 2009 by sh

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Water has the highest boiling point. B. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. C. Dispersion forces affect all three ...
February 4, 2008 by jose

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. H-O-H and C-O-H bond angles are all equal to 109.5. B. Dispersion forces affect all three molecules. C. Two lone pairs of electrons are assigned to the oxygen in each Lewis ...
February 9, 2008 by Anonymous

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. B. Dispersion forces affect all three molecules. C. H-O-H and C-O-H bond ...
February 10, 2008 by Anonymous

Chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. B. H-O-H and C-O-H bond angles are all equal to 1095. C. Dispersion forces ...
May 3, 2008 by Tom

chemistry
Which of the following statements is NOT true in regards to water, ethanol, and isopropanol? A. H-O-H and C-O-H bond angles are all equal to 1095. B. Two lone pairs of electrons are assigned to the oxygen in each Lewis structure of all three molecules. C. Dispersion forces ...
February 3, 2009 by Kyle

chemistry
the following reaction has a Kp = 109 at 25 degrees C 2NO(g) + Br2(g) reversible 2NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and equil pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equlibrium. What are the steps to follow for ...
December 3, 2007 by Rebekah

chemistry
Calculate the following quantities. (See the periodic table.) (a) mass, in grams, of 2.54 10-2 mol of CdS g (b) number of moles of NH4Cl in 90.0 g of this substance mol (c) number of molecules in 5.081 10-2 mol C6H6 molecules (d) number of O atoms in 4.72 10-3 mol Al(NO3)3
August 2, 2012 by Anonymous

Biology
Cells absorbing sugar or other small molecules from their surroundings is an example of A. diffusion B.osmosis C. exocytosis D.endocytosis I think it is either C or D because they both have to do with the transportation of molecules in and out of cells.
December 30, 2011 by tim

Science
1. Massive amounts of destructive energy are released when a nuclear fission bomb explodes. Where does that energy come from? a) A chain reaction occurs when uranium atoms split, releasing nuclear energy. b) Molecules break down, releasing chemical energy. c) Hydrogen atoms ...
May 15, 2016 by Lez

Science
the active ingredient in the alergy medication claritin contain carbon,hydrogen,chloride,nitrogen,and oxygen its molecules formula is C22H23ClN2O2.the standard adult gosage utizies 1.572*10^19 molecules of the spicies determine the mass gosage of the active ingridient in the ...
February 2, 2016 by Kriatian ferrer

Chemisty
For the following equilibrium; Br2 (g) + Cl2 (g) ⇄ 2BrCl (g) the Kc = 7.00 at 127oC. If 0.450 mol of Br2 (g) and 0.450 mol of Cl2 (g) are introduced into a 3.00 L container at 400 K, what will the equilibrium concentration of BrCl(g) be?
November 29, 2012 by OVA9000

Science HW - - - check my answers?
1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B 2. Which waves have the longest wavelength and lowest energy on the ...
March 5, 2014 by Chevelle

chemistry
At what temperature does the rms speed of Cl2 molecules equal 401 m/s?
October 24, 2010 by caroline

Physics
A passenger on a train notices that a 2.00 kg mass is displaced 10.0 from the vertical as the train accelerates. (a) What is the acceleration of the train? (b) What would the acceleration be if the mass was 5.00 kg? c. What would angle have to be to indicate a horizontal ...
June 3, 2014 by Anonymous

physics
A passenger on a train notices that a 2.00 kg mass is displaced 10.0 from the vertical as the train accelerates. (a) What is the acceleration of the train? (b) What would the acceleration be if the mass was 5.00 kg? c. What would angle have to be to indicate a horizontal ...
June 3, 2014 by Anonymous

physics
Two ice skaters of equal mass grab hands and spin in a circle once every four seconds. their arms are 0.76 m and they each have mass of 55.0 kg. how hard are they pulling on one another?
November 18, 2015 by Anonymous

Science
1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B 2. Which waves have the longest wavelength and lowest energy on the ...
March 5, 2014 by Lindsay

ChEMistry
a binary compound between germanium and bromine would have a formula like: (a)
November 7, 2006 by kooldude

Chemistry
a) If you have 5 dinitrogen monoxide molecules, how many nitrogen atoms do you have? b) If I had 5 moles of dinitrogen monoxide molecules, how many individual nitrogen atoms would I have? I think the answer for A is 6 nitrogen atoms. but I have no idea on B.
March 22, 2016 by Mae

chemestry
the common isotopes of chlorine weigh 35&37 units A.How many different mass molecules are there for dichlormethane,ch2 cl2? B. Draw and label each molecule C. explain why the ram of chlorine is about 35.5& not a whole number. D. lighter molecules diffuse more quickly. which ...
March 26, 2015 by nancy

phy
At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilomole of oxygen has a mass of 32kg.
January 24, 2013 by christ

Chemistry
Which equation shows conservation of mass and charge? A.NH4Br → NH3 + Br2 B. 2Mg + Fe3+ → Mg2+ + 3Fe C. H2SO4 + LiOH → Li2SO4 + H2O D. Cu + 2Ag+ → Cu2+ + 2Ag It's either b or d, since they both have two elements with an oxidation number of 0. Which one ...
May 21, 2011 by Angie

chemistry
-2.60- Hi here is a question I am having trouble with. I need help only on part c. ____________________________________________________________________________________________________________________________________________________________ Each time you inhale, you take in ...
September 16, 2007 by manny

chem
i need help on this question: Equal masses of gaseous N2 and Ar are placed in separate flasks of equal volume at the same temperature. Tell whether each of the following statements is true or false. a) There are more molecules of N2 are present than atoms of Ar. true or false...
February 10, 2011 by hannah

Chemistry
A 0.960mol quantity of Br2 is added to a 1.00 L reaction vessel that contains 1.23mol of H2 gas at 1000 K. What are the partial pressures of H2, Br2, and HBr at equilibrium? At 1000 K, Kp=2.1106 and ΔH∘ = -101.7 kJ for the reaction H2(g)+Br2(g)⇌2HBr(g). Dr ...
February 6, 2014 by Anonymous

Thermal Physics, Kinetic Theory of Gases
Oxygen (O2) has a molar mass of 32 g/mol. (e) Suppose an oxygen molecule traveling at this speed bounces back and forth between opposite sides of a cubical vessel 0.10 m on a side. Find the average force it exerts on one of the walls of the container. (Assume that the molecule...
November 1, 2012 by Help!!

Math
I have two problemson polygonal convex sets which I do not understand. The first: Find the minimum value of f(x,y) = 2x-y+2 for the polygonal convex set determined by this system of inequalities: x is more than or equal to 1 x is less than or equal to 3 y is more than or ...
January 20, 2009 by Joanie

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 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
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

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
You purchased a 5.00 pound bag of sugar (sucrose, C12H22O11) at the grocery last week to bake cookies. Conversion: 1 pound = 1 lb = 454 grams. a.How many grams of sucrose did you purchase? 454 grams (g) = 1 pound (lb) 454 g * 5 = 2270 g A 5 pound bag of sugar is equal to 2270 ...
September 23, 2015 by Chelsea

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
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
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

chemistry
For the following reaction at equilibrium, which change would shift the position of equilibrium toward forming more products? (Circle your answer(s) as there may be more than one.) 2NOBr(g) 2NO(g) + Br2(g), ∆Hrxn = +30 kJ/mol A) Decrease the total pressure by ...
March 30, 2016 by maria

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
mass of dry crucible=34.69g mass of crucible with magnesium=34.68g mass of crucible with magnesium oxide =34.97g we did a lab and igot the mass for magnesium to be 0.17g and the mass for magnesium oxide to be 0.28g. how can i find the moles of magnesium and the number of ...
November 19, 2014 by jane c

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 .

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

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

Physical Science
how do i find the number of molecules in a packet of sweetners (splenda, equal, sweet & low).
January 18, 2015 by andra

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
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

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

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!!!

chemistry
17. Calculate H for the following reaction using Hess law H2 (g) + Br2 (g) → 2 HBr (g) Experimental information 2 H+ → H2 H -436.4 kJ 2 Br- → Br2 H -192.5 kJ 2 H+ + 2 Br- →2 HBr H -144.8 kJ
April 2, 2015 by john

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
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
what is the mass of bromine contains the same number of atoms of 50.0 g of iodine? my work: 50g/79.5g= .628 mol(Br) 50g/126g=.394 mol(I)
November 4, 2015 by fatima

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