Number of results: 108,927
Intergated chemistry/physics
time=distance/velocity. This is a very odd question for "integerated" chem/physics. Where is the chem?
Wednesday, October 3, 2012 at 1:53pm by bobpursley
physics vs. Chem
Doesnt physics seem to be harder than chem? Anyone?
Sunday, October 24, 2010 at 2:28pm by Kavi
AP Chem
I looked at the first four, they are right. Dont you work with someone on chem homework? Like a study group? That is a very effective way to work chem and physics problems.
Wednesday, November 19, 2008 at 11:22am by bobpursley
physics
I am really wondering why your teacher is giving you this in physics. Is your physics teacher teaching chem?
Sunday, April 24, 2011 at 4:08pm by bobpursley
physics--not chem
x
Wednesday, April 18, 2012 at 2:47pm by DrBob222
Chem? Physics?
What?
Tuesday, May 11, 2010 at 7:54am by Writeacher
Chem/Physics
4.726 J
Friday, October 14, 2011 at 2:15pm by Anonymous
Physics
I think these are chem questions.
Tuesday, January 22, 2013 at 9:43pm by Anonymous
Chem/Physics
Answered above.
Sunday, October 5, 2008 at 6:01pm by DrBob222
chem help
ok thanks alot... the PartB asks for: What is the percent ionization of ammonia at this concentration?
Saturday, February 28, 2009 at 11:56pm by chem
chem
I DONT GET WHATS DONE.. DR.Bob22 - could u please explain this again..thank u
Tuesday, February 17, 2009 at 12:10am by CHEM
gen chem
i tried that, apparently its not the right answer either =/.
Saturday, May 8, 2010 at 7:46pm by Chem
CHEM organic chem
Responded above to a later repost.
Tuesday, November 13, 2007 at 6:18pm by DrBob222
Chem
0.102 x 0.0821 x 273 / 1.0 what can i express this in the correct number of significant figures ?@_@
Wednesday, August 29, 2012 at 4:51am by Chem ):
chem
... This isn't in the right section. That's math, not chem. the answer though is, 23.
Wednesday, February 10, 2010 at 7:40pm by Nadia Samim
O.CHEM -> PLEASE CHECK!!
Thank you...good to know, but isn't there a "Dr.Russ" that works with Organic Chem??
Wednesday, March 12, 2008 at 9:48pm by K
G-chem/org. chem=>Dr. Bob222
I mean are setups differ for part 1
Friday, February 8, 2013 at 5:58pm by Devron
chem
The answer on mast chem is 279 if you have 230 grams instead of 200.
Monday, February 15, 2010 at 4:46pm by Anonymous
Chem
maybe try using P1V1/n1T1 = P2V2/n2T2 ... im in chem too...
Saturday, February 27, 2010 at 1:16am by fellow student
chem
sorry read it wrong, doing this now in chem
Tuesday, March 19, 2013 at 6:02pm by Amanda
chem
How to find the %(W/V) of 134mL of a 0.610 M solution of Mg(OH)2
Thursday, February 16, 2012 at 9:00pm by chem
organic chem
cadaverine is AKA pentane-1,5-diamine
Tuesday, April 26, 2011 at 5:18am by chem
organic chem
cadaverine is AKA pentane-1,5-diamine
Tuesday, April 26, 2011 at 5:18am by chem
gen chem
yes, I figured that one out. Thanks so much for the help!
Sunday, May 9, 2010 at 3:42pm by Chem
chem help
sorry the 2nd question is the right one
Saturday, February 28, 2009 at 11:56pm by chem
chem PLEASE HELP
I am very sorry. Chem is just not my thing and i looked in my notes the book and everything
Thursday, April 14, 2011 at 7:40pm by Sal
chem
ahh i hate chemisty, i'm kindof slow too and everything confuses me in chem.!! i feel the same way as you:)
Thursday, May 29, 2008 at 9:59pm by bethany
CHEM
FUUUUKKKK CHEM
Monday, November 5, 2007 at 10:14pm by ABU EL 3BED
chem
Sarah, 4.70 is what you get when you do the -log (Ka)
Monday, April 4, 2011 at 1:24am by chem
Chem/Physics
see other post
Wednesday, October 15, 2008 at 2:17am by Dr Russ
Chemistry
so the first one is wrong too hmmm ! yeah ur reasoning makes sense ... i will ask my chem teacher too
Saturday, November 28, 2009 at 8:14pm by Chem Lover
Chem
1. 7.95 g 2. 7.956 g 3. 7.96 g 4. 7.960 g 5. 8.0 g 6. 8.00 7. none of the above Which is more the right choice....It can't be 7,6,5 for sure....But I thought it was 3. It's not 2.
Friday, February 8, 2008 at 3:13pm by Chem Help!!
gen chem
what must be the current in amperes to plate out 7.437g of Al from am aqueous solution of Al3+ in 5.4x10^2 minutes?
Saturday, May 8, 2010 at 6:56pm by Chem
G-chem/org. chem=>Dr. Bob222
I just looked at Dr. Bob222's post for when you initially posted this question and the setup that I gave you for part 1 differs from the setup that he gave you for part 2. I will let him resolve that for you since he has more experience in G-chem then I do, and he is ...
Friday, February 8, 2013 at 5:58pm by Devron
Chem (but i think its physics)
I did not check the numbers, but the steps are correct.
Thursday, February 3, 2011 at 11:08pm by MathMate
gen chem
that works! thank you so much!!
Sunday, May 9, 2010 at 3:42pm by Chem
gen chem
yes, it wants an actual value
Sunday, May 9, 2010 at 3:17pm by Chem
gen chem
what is "n" and thank you so much for all the help!
Saturday, May 8, 2010 at 7:46pm by Chem
Chem (but i think its physics)
Ok so this problem appeared in my online chem homework, but it looks alot more like a physics problem. I have no idea how to do it A 203 lb man eats an order of French Fries consuming 250 Cal of food energy. Afterwards he feels guilty and decides to work off the excess ...
Thursday, February 3, 2011 at 11:08pm by D
Chem/Physics
1. How much work is necessary to accelerate a bullet having a mass of 5.0 g to a velocity of 1000. m/sec? This was on a chemistry problem set of mine, and it seems like a very physics-oriented question [I have not taken physics.] Could someone point me in the right direction ...
Saturday, February 3, 2007 at 6:39pm by Jess
physics
Vrms = sqrt [3RT/M] M is the molar mass, 28 g/mol R = 8.317*10^7 erg/mole K T = 293 K You don't need to know the the density, but you could use it to get R/M. V will be in cm/s with these units For some background on kinetic theory, see http://itl.chem.ufl.edu/2041_f97/...
Saturday, March 13, 2010 at 11:41am by drwls
Chem
The correction terms in the Van der Waals equation for a gas are designed to correct A. the pressure term (P +a/V2) for the attractive forces between particles. B. the volume term (V-b) for the finite volume of the particles. C. For the volume term (b) not the pressure term (a...
Wednesday, October 18, 2006 at 7:23pm by Mendi
chem help
see the short paragraph and visual titled Predicting ion charges. http://antoine.frostburg.edu/chem/senese/101/atoms/
Saturday, November 24, 2007 at 7:59pm by bobpursley
gen chem
2NO <-> N2 O2 initial .116 0 0 change -x +x +x equil .116-x x x
Sunday, May 9, 2010 at 3:42pm by Chem
gen chem
yes I did, but im still not getting the right answer. I got .1136 which is not the correct answer.
Sunday, May 9, 2010 at 3:42pm by Chem
chem help
Ammonia,is a weak base with a Kb value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?
Saturday, February 28, 2009 at 11:56pm by chem
chem help
Ammonia,is a weak base with a Ka value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?
Saturday, February 28, 2009 at 11:56pm by chem
chem: study of kinetics
he gave us an example of what the slope might be in class and it was -1.3x10^2 but my slop is completely different, was i supposed to do calculations? or just get the one from excel? what do i put in the 2 blanks?
Saturday, October 16, 2010 at 2:20pm by chem
Chem/Physics
Can you not at least look in your textbook? There just HAS to be a formula for kinetic energy: K = 1/2 m v^2 You have m and v. What's the problem?
Friday, October 14, 2011 at 2:15pm by Steve
Chem 1LB
You would times it by the momentum currency of memorandum which is stated in Hess's law of physics
Sunday, February 21, 2010 at 4:49pm by DrBob222
ap chemistry
I agree on the tutor. Also, get another text (college used book store) to see the same material in differing words. On the ap chem board exam, nationally, most do not do well. I have to be honest, most ap chem students need to retake college chem if for nothing else, the lab ...
Sunday, November 4, 2012 at 4:07pm by bobpursley
physics (gas laws)
You have to look up the vapor pressure. See http://genchem1.chem.okstate.edu/1314SP06/Database/VPWater.html for example. Assuming that the gas was saturqated with H2O, the final volume is reduced to 96.9% of the initial volume, or 315 ml.
Saturday, January 26, 2008 at 9:08pm by drwls
gen chem
what would Qc be if the pressure of the container decreased by a factor of 2.417 for the following reaction? 4Hcl(g)+O2(g)<-->2Cl2(g)+2H2O(g) Kc=13.298 @ 753K
Sunday, May 9, 2010 at 3:17pm by Chem
In your opinion=> has it payed off for you Dr.Bob? (I need some advice)
I don't know where to start but I was thinking of changing my major to chemistry but that would require me to go to another school since mine doesn't have a chemistry major. This is rather ironic since they have all the major chem classes needed to get a chemistry ...
Tuesday, March 25, 2008 at 9:50pm by ~christina~
chem HELP PLEASE its physics side of chem
given E, = l^2 h^2 / 2 m r^2 calculate energies for an electron localised to a circle of radius 2 x 10^-9 m for l = 0,1,2, draw pictures of three levels and calculate the relative populations of these levels at 300K i did the first bit but came out with, 0, 6.0249 x 10-6 J mol...
Tuesday, October 27, 2009 at 4:51pm by poppy
Physics
This is the first site I found of many although not all of them had supplementary problems. You can find others by typing in dimensional analysis at www.google.com http://www.chem.tamu.edu/class/fyp/mathrev/mr-da.html
Tuesday, July 8, 2008 at 8:13pm by DrBob222
chem
The larger an atom the farther the electrons are away from the nucleus; therefore, the easier it is to distort them. Here is a site that talks about that. http://www.chem.purdue.edu/gchelp/liquids/disperse.html
Friday, November 28, 2008 at 4:49pm by DrBob222
chem
You have to subtract the water vapor pressure at 25C from 760Torr. http://intro.chem.okstate.edu/1515sp01/database/vpwater.html
Tuesday, February 2, 2010 at 10:41pm by bobpursley
gen chem
E cell is not given, just the E0 cell which is -1.133V
Saturday, May 8, 2010 at 7:46pm by Chem
physics/chem
Do the following calculations, and write the answers with the correct number of significant figures. (a) 15.45 m 8.21 m
Monday, March 31, 2008 at 1:24am by anna
chem- drbob222 please help
my original question was: how do i figure this out?? How much heat does your body lose when 2.46 g of sweat evaporates from your skin at 25°C? chem - DrBob222, Tuesday, February 22, 2011 at 10:52pm q = mass water x delta Hvaporization. chem - Rebekah, Wednesday, February ...
Wednesday, February 23, 2011 at 5:49pm by Rebekah
Chemistry
I'm lost!!! Not sure if I'm just losing concentration after 50 chem problems or losing my mind with 3 kids running around still and a chem exam at 8am!!!
Friday, March 29, 2013 at 12:15am by Ryan Curry
Chem 2
Sorry my friend Barbie and I are doing are chem h.w. together. We each posted a question and since were using the same computer the last name always stays saved in the page...sorry I forgot to change it. It
Wednesday, February 27, 2008 at 3:28pm by Amanda
Chem
What causes dispersion forces? Disperson forces are caused by an unsymettrical distribution of charge in the molecule, causing a net electric force. http://www.chem.purdue.edu/gchelp/liquids/disperse.html
Tuesday, January 9, 2007 at 6:46am by Dennis
Chem Help!
I really need help with this question for my chem H.W. 1) On a summer day in Breckenridge, Colorado, the atmospheric pressure is 525 mm Hg. What is this air pressure in atmospheres? (round to the hundredths place) atm
Thursday, April 10, 2008 at 12:34pm by Lisa
HARD CHEM QUESTION- any help appreciated
Have you ever heard of ICE charts? http://www.chem.purdue.edu/gchelp/howtosolveit/Equilibrium/ICEchart.htm
Monday, May 13, 2013 at 8:48pm by bobpursley
chem:ionic equations
Here are a set of rules for solubility. Memorize them. http://www.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
Tuesday, November 27, 2007 at 12:15am by DrBob222
chem
Al is an element. The others are compounds. Consult this site for solubility. http://www.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
Monday, October 8, 2007 at 9:39pm by DrBob222
Chem
Hey, no problem. It was a real epiphany for me when I took physics, when I found out that units could be canceled just like numeric factors.
Wednesday, September 12, 2012 at 1:00pm by Steve
gen chem
what is the pK (=-logK)at 25C for the reaction below? Cl2(g)+6H2O(l)+5Cu2+(aq)<-->2ClO3-(aq)+12H+(aq)+5Cu(s) E0=-1.133V
Saturday, May 8, 2010 at 7:46pm by Chem
physics
The V*T product is not constant. You may be thinking of gases, for which V/T is constant and a fixed pressure. They are asking about liquid ethyl alcohol. What you need is the coefficient of bulk (volume) thermal expansion of alcohol. It may be somewhere in your assignment, or...
Sunday, January 8, 2012 at 9:18pm by drwls
CHEMISTRY
AMMONIA GAS OCCUPIES A VOLUME OF 5.00 L AT 4DEGREES C AT 760 TORR. FIND ITS VOLUME AT77DEGREES C AND 800 TORR
Wednesday, July 7, 2010 at 10:44pm by CHEM CHEM
(physics/chemistry)
You may have got this question in a chem glass, but it is really about physics. E = h*frequency is the equation to use h is Planck's constant, which you were given. Solve for the frequency, in s^-1 (also called Hz) You don't need to use the speed of light to answer ...
Thursday, October 21, 2010 at 12:57pm by drwls
chemistry
http://dwb4.unl.edu/Chem/CHEM869J/CHEM869JLinks/www.chem.ualberta.ca/courses/plambeck/p101/p01182.htm
Monday, March 8, 2010 at 1:54am by DrBob222
Chem/Physics
Are there two ways of calculating the average kinetic energy of a molecule? Ik that 1/2mv^2 works but for this problem, i dont know the mass or the velocity....
Sunday, October 5, 2008 at 6:01pm by Rachel
Chem
Christina, Hello I'm Lisa. Thank you for your help you provided for my chem assignment. I really appreciate it! Have a nice day!
Tuesday, March 11, 2008 at 6:29pm by from Lisa to Christina
Dr.Bob222 Chem
I believe that you are correct because you have more experience in G-chem then I have. But how does doubling the reaction rate double the k value? Isn't k just a constant for a particular reaction?
Friday, February 1, 2013 at 10:15pm by Devron
College Chem 1010
Here is a simplified list of solubility rules. http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html A) Ca(NO3)2 B) FePO4 C) NH4OH D) Na2SO4 E) NaCl
Sunday, April 15, 2012 at 10:48pm by DrBob222
chem
if a car produces 81g of {\rm CO_2}, how many grams of {\rm O_2} are used up in the reaction? the complete chem reaction is C2H6O+3O2--->2CO2+3H2O
Friday, October 19, 2012 at 8:20am by tracy
gen chem
At 2273K, equilibrium constant for the reaction 2NO(g)<->N2(g)+O2(g) Kc=2.4x10^3 What would be equilibrim concentration of N2, if initial concentration of NO was 0.1160M?
Sunday, May 9, 2010 at 3:42pm by Chem
chem
so i posted this question yesturday and got some help. which is the stuff below. can you look at the last thing i said which was the answer i got by doing what DrBob222 said to do and tell me if its correct.(the question is the first section) thanks chem - hannah, A salt ...
Wednesday, November 10, 2010 at 4:18pm by hannah
Chem answer check
PbI2 is an insoluble salt. See the solubility rules. http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
Monday, February 22, 2010 at 5:12pm by DrBob222
Chem
We are unable to draw diagrams on these boards. However, here is a site that gives the structure for #1 together with the resonance structures. If I find the structure on the web for #2 I shall post it. http://www.chem.ucsb.edu/~genchem/Chem1CS03/examanswers/final_white.pdf
Monday, September 7, 2009 at 12:07pm by DrBob222
college chem
http://www.chem.uiuc.edu/chem103/aluminum/AlIntroduction.htm
Tuesday, June 26, 2012 at 1:36am by bobpursley
Chem 1
Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would help me tremendously...
Tuesday, April 9, 2013 at 8:00pm by Jess
Chem
You need to know the solubility rules. Here is a simplified set. http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
Sunday, February 13, 2011 at 7:22pm by DrBob222
sand bath (chem)
what are disadvantages and advantages of using a sand bath to heat something in chem?
Sunday, October 21, 2007 at 7:31pm by ~christina~
Chem help
Here is a site that give you some insight on lattice energy. http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch7/lattice.html Yes, paramegnetic species will be those that have unpaired electrons. s and p.
Wednesday, November 28, 2007 at 1:01pm by DrBob222
chem
Here is a simplified set of solubility rules. http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
Thursday, February 10, 2011 at 11:49pm by DrBob222
Chem
complete and balance the following decompition equations CaCO (heated) --> 3 please tell me how to do this and what exactly is suppose to be going through my head while doing this. I can balance these equations with no problem I just have no idea what to do...
Wednesday, December 17, 2008 at 7:09pm by Chem
Chem
I Googled Millikan electron and found this. http://chem.ch.huji.ac.il/history/millikan.html
Thursday, November 15, 2007 at 2:53pm by Ms. Sue
Chem/physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Sunday, February 17, 2013 at 11:19am by PsyDAG
Chem/Physics
A baseball weighs 5.19 . What is the kinetic energy in joules of this baseball when it is thrown by a major-league pitcher at 98.0 ?
Friday, October 14, 2011 at 2:15pm by Anonymous
physics/chem
Find the volume of one mole (27/2.7 cm^3). Divide that by avag number, that will be the volume per atom.
Tuesday, April 22, 2008 at 7:39pm by bobpursley
chem
What is another name for cardamist? Please write the formula and a link to its structure. See http://antoine.frostburg.edu/chem/senese/101/consumer/faq/what-is-cardamist.shtml
Sunday, September 4, 2005 at 5:04pm by Nisar
Chemistry
As for chem I vs chem II, I think you are expected to know the material from I going into II. And this is another of the problems with the test. How many profs around the country start and stop the semester with the same number of topics and to the same depth?
Thursday, April 19, 2012 at 8:27pm by DrBob222
9th grade chem
delta T=iKm K=1.853C/m find delta T. (hint: m=mol glucose/kg H2O)Then subtract that value from 0 degrees Celsius. http://library.thinkquest.org/C006669/data/Chem/colligative/colligative.html
Tuesday, December 14, 2010 at 6:53pm by TutorCat
physics
III is false also. There is no need for work to be done, it could have been stored as potential energy (like in mech or chem energy).
Wednesday, June 24, 2009 at 7:42pm by bobpursley
Chem
so wat do i do?
Wednesday, December 17, 2008 at 7:09pm by Chem
chem
E is NOT NOT NOT THE ANSWER!!!!
Friday, August 15, 2008 at 6:25pm by Chem
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