Number of results: 50,541
chem -repost for bobpursley
on a per mole basis, you release 4 moles of new gas. At STP, it occupies 2*22.4 liters
Sunday, April 17, 2011 at 8:53pm by bobpursley
chem -repost for bobpursley
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8...
Sunday, April 17, 2011 at 8:53pm by please, help me
chem -repost for bobpursley
oh i didn't know that before, thank you very much! :)
Sunday, April 17, 2011 at 8:53pm by please, help me
chem-repost
WEll, both of us showed you, I am sorry it is marked wrong.
Sunday, October 24, 2010 at 5:57pm by bobpursley
chem -repost for bobpursley
2. Yes, it is acidic because it is a salt made from a salt of a strong acid and a weak base. 3. Catalysts speed a reaction by providing an alternate reaction pathway, since they speed it, the rate constant is greatly changed. Good thinking.
Saturday, April 9, 2011 at 2:34pm by bobpursley
CHEM organic chem
Responded above to a later repost.
Tuesday, November 13, 2007 at 6:18pm by DrBob222
chem -repost for bobpursley
I confused the rate constant with Keq, silly me. k=Ae^(-Ea/RT) looking at that equation and given my options... the answer would be D, none of these. I believe that's right, I understand this much better now, thank you.
Saturday, April 9, 2011 at 2:34pm by polkadot
Math repost for Spenser
You are looking for the form (x-h)^2 + (y-k)^2 = r^2 x^2 -x +y^2 + 2y - 3=0 so grouping by perfect squares... (x^2 -x + 1/4) + (y^2+2y+1)= +3-1/4-1 you do the rest. If you need help, repost.
Wednesday, October 10, 2007 at 1:35pm by bobpursley
Bobpursley can you help me with my problems below?
I had problems from yesterday but I still don't get them can you help?do you want me to repost? repost: I cant find them.
Sunday, March 4, 2007 at 3:21pm by Margie
Chemistry
Can you repost #1 please. Thanks.
Monday, August 10, 2009 at 8:08pm by Chem
chem repost
Answered below.
Sunday, April 12, 2009 at 7:47pm by DrBob222
repost-chem
I responded to this at your post below.
Wednesday, October 13, 2010 at 8:35pm by DrBob222
repost-chem
I answered this at the original post.
Wednesday, October 13, 2010 at 8:35pm by DrBob222
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
chem- repost
thank you for responding, where did you get "4 x 22.4dm^3/1000dm^3" from though?
Sunday, April 17, 2011 at 7:20pm by please, help me
chem repost
oh. sorry i didn't see my other post was answered thanks
Sunday, November 21, 2010 at 5:02pm by hannah
chem-repost
2Mg+O2>>2MgO n=PV/RT=13.5/22.4*moles of O2, so you will get twice that in MgO, or 13.5/11.2 moles MgO, so what mass of MgO is that number of moles?
Thursday, February 17, 2011 at 8:29pm by bobpursley
science(chem)
I have to go out but I'll check and repost if I don't understand. Thanks Dr.Bob
Sunday, May 4, 2008 at 2:30pm by Anonymous
chem- repost
work at constant temp and pressure, will be pressure*deltaV in this case, you get two volumes of product S8(s)+4O2>>8SO2 work= p*dV on a per S8 mole basis, work= 101.3kPa*4*22.4dm^3*1m^3/1000dm^3 work= above in Joules check my thinking
Sunday, April 17, 2011 at 7:20pm by bobpursley
chem repost
Let me know if you still have trouble but I'll bet that small changes gets it into shape that you can do it.
Sunday, November 21, 2010 at 5:02pm by DrBob222
repost-chem
ok. thanks. I have a question about it that i posted on my previous post. think u could check it out? thanks
Wednesday, October 13, 2010 at 8:35pm by Hannah
AP chem
Repost the question and tell us what you don't understand. I looked for the eric post and couldn't find it.
Wednesday, January 23, 2008 at 9:18pm by DrBob222
chem
I worked this for someone just a second ago. If not for you, repost at the top of the board and I'll find it to give you a link.
Tuesday, March 22, 2011 at 4:16pm by DrBob222
Calc Repost
Nor do I.
Monday, September 20, 2010 at 11:36am by bobpursley
statistics
repost, by typing.
Monday, October 12, 2009 at 3:09am by bobpursley
math (repost)
if f(3) is five, what is g(5)?
Monday, April 14, 2008 at 1:03pm by bobpursley
physics repost
I agree.
Thursday, April 3, 2008 at 9:30am by bobpursley
physics repost bobpursley
This is a simple math problem . c=300/300 * 4.18* 10/50 = .8 j/gC about. Now if you do specific heat in calories, you get .2. Numbers without units are meaningless.
Monday, June 22, 2009 at 10:48pm by bobpursley
chem
It almost 24 hours since we worked on this. If you still need it, repost at the top of the page and I'll try to go through it with you.
Monday, March 1, 2010 at 11:37pm by DrBob222
physics repost
g=F/m=G*Massvenus/radius^2
Thursday, April 3, 2008 at 9:32am by bobpursley
physics repost
correct on both.
Monday, March 31, 2008 at 3:40pm by bobpursley
Algebra II repost, pls help
you are correct.
Friday, May 20, 2011 at 4:56pm by bobpursley
College Physics (repost)
How can anyone help you without the paths?
Monday, October 12, 2009 at 10:33pm by bobpursley
math (repost)
set them equal... x^2=x+2 x^2-x-2=0 (x-2)(x+1)=0 solve for x
Tuesday, April 8, 2008 at 11:57am by bobpursley
physics repost
What does 1/4 the way down mean?
Friday, April 4, 2008 at 12:07pm by bobpursley
physics EM repost
good. but actually, N=L/d
Monday, March 31, 2008 at 2:15pm by bobpursley
REPOST
I would stick to superman flying.
Saturday, December 8, 2007 at 7:54pm by bobpursley
AP chemistry
I will be happy to critique, repost with how you approach it.
Friday, November 12, 2010 at 6:30pm by bobpursley
math
something is missing in your problem. Please repost.
Wednesday, February 3, 2010 at 9:38pm by bobpursley
Algebra
I will be happy to critique your thinking on this. Please repost with that.
Thursday, December 17, 2009 at 7:47pm by bobpursley
Repost- Biology
I dont know number 4. The rest are correct.
Sunday, September 13, 2009 at 9:27pm by bobpursley
physics repost
I will be happy to critique your thinking or work.
Saturday, April 19, 2008 at 9:32am by bobpursley
Abby
Please repost your question, I accidently deleted it.
Wednesday, April 9, 2008 at 6:26pm by bobpursley
physics repost
Stationary...no change in height is occuring.
Friday, April 4, 2008 at 12:07pm by bobpursley
physics repost
No, you need height relative to the desk.
Friday, April 4, 2008 at 12:08pm by bobpursley
physics repost
I never had a calculator that could think.
Thursday, April 3, 2008 at 9:31am by bobpursley
PHYSICS REPOST
gravity is still there: T= mg-ma
Sunday, October 14, 2007 at 4:59pm by bobpursley
Repost for Ramiro Moreno
There are no functions listed herein.
Wednesday, September 26, 2007 at 3:10pm by bobpursley
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
Chem- bobpursley
1.67E-27kg*(.0015/9.11E-31) =2.75 so three protons.
Tuesday, September 21, 2010 at 8:39pm by bobpursley
chemistry HMWK help.......
balance the equation. Repost, and I will lead you to the solution.
Thursday, November 11, 2010 at 5:23pm by bobpursley
Math Repost (Logs)
No. 10^.704=100/x solve for x
Sunday, February 21, 2010 at 4:54pm by bobpursley
phisics
Mg =mv^2/r Repost if you need your work critiqued.
Thursday, November 5, 2009 at 5:51am by bobpursley
Calculus (repost)
is the domain of x in radians, degrees, or what? Is that what your calculator is set at?
Monday, June 8, 2009 at 4:50pm by bobpursley
physics repost
Thinking is correct. I didn't check calc work.
Friday, April 4, 2008 at 12:08pm by bobpursley
Need help also with this chem ?
This is the same kind of problem that I helped you with. Now that you see how to do that, try this one on your own. If you still have trouble. repost and explain what you don't understand.
Friday, May 2, 2008 at 1:52pm by DrBob222
Chemistry
Please repost it . Jan 20 is beyond my recall ability.
Tuesday, October 14, 2008 at 9:37pm by bobpursley
physics repost
I didnt check calc work, but thinking is correct.
Friday, April 4, 2008 at 12:10pm by bobpursley
physics repost
What was the force used to pull the cable horizontally? Was there any friction?
Friday, April 4, 2008 at 12:09pm by bobpursley
physics repost
solve for v. v= massbullet/massmarksman * velocty bullet. Algebra.
Thursday, April 3, 2008 at 9:33am by bobpursley
Math
Your question begs for amplification. Repost it asking what you are stumped on, giving details.
Sunday, November 25, 2007 at 11:11am by bobpursley
Law repost -bobpursley
I think it was pursuant to a valid court order
Thursday, November 15, 2007 at 7:53am by Anonymous
Repost Math for Steve Dowling
-5*8/(18*15) = -1*2*4/(9*2*3) = -4/27 check that
Thursday, September 13, 2007 at 8:51pm by bobpursley
Chem- bobpursley
What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p chem - bobpursley, Tuesday, September 21, 2010 at 6:48pm That is what I would do also. But I ...
Tuesday, September 21, 2010 at 8:39pm by Sara
repost of composition
You're welcome -- and yes, I have four! Be sure to develop that essay and repost. Then we'll see what you learned. =)
Wednesday, November 5, 2008 at 10:03am by Writeacher
Chem
Are: Ba(NO3)2, Ti)2, MgI2, and Ca(CH3COO)2 soluble or insoluble in H2O @ 25degrees C? Here is a site that lists the solubility rules. You should know this table; eventually you will want to know it so well that it is memorized. If you still have questions after viewing this ...
Friday, October 20, 2006 at 1:41pm by K
Chemistry
This is something you need to suffer thru the mental processes. Do so, and I will critique it for you, repost.
Sunday, November 14, 2010 at 11:37am by bobpursley
repost
posted. You need to go thru the math yourself with paper and pencil.
Sunday, September 30, 2007 at 7:10pm by bobpursley
Physics - Repost
If you had your own website, or YouTube.. I can't decode the picture from words.
Tuesday, September 11, 2007 at 11:18pm by bobpursley
chem
Do you omit the arrows on purpose? I can't tell reactants from products without the arrows. Please repost and show the arrows.
Saturday, December 1, 2007 at 3:53pm by DrBob222
chem repost
I got most of it but there is one coefficient its counting wrong. i posted my problem on the previous post. would you like me to post it here also?
Sunday, November 21, 2010 at 5:02pm by hannah
Algebra(repost of one question)
Bobpursley: 89. Solve for x in the equation: (6/7)x - 6 = -2 I got x=28/3
Saturday, May 1, 2010 at 10:21pm by y912f
physics repost
Volume is not a physical property. Nor is pressure. Are you reading these questions carefully?
Friday, April 4, 2008 at 12:06pm by bobpursley
physics repost
Wouldn't it be massbullet*velocitybullet=massmarksman*v v then would be something different than your calcs.
Thursday, April 3, 2008 at 9:33am by bobpursley
physics repost
No. The inverse law applies. If the distance shrinks, the force increases. g= 9.8/(1/.21)^2
Thursday, April 3, 2008 at 9:33am by bobpursley
chem repost!
when drawing molecular shapes, how do you decide which atoms go on axial or equtorial? (the more electronegative goes on _____) please help, my textbook confuses me with exmaples that follow both sides!
Sunday, November 11, 2007 at 3:43pm by alex
Writing
Bobpursley is right. Please proofread and follow his instructions. Then repost and I'll read your answer.
Sunday, August 21, 2011 at 8:35pm by Ms. Sue
Physics repost
Arrrgggg. Where did I read a ten ohm resistor was added in series. You are right. Sorry.
Wednesday, April 9, 2008 at 7:42pm by bobpursley
Physics repost
Not checking your math, if it is -10 and 30, the distance between those points is 40cm.
Tuesday, April 8, 2008 at 12:46pm by bobpursley
physics repost
Assuming no friction, then figure the change in KE. That will be the work involved, then divide by time.
Friday, April 4, 2008 at 12:09pm by bobpursley
Science repost for Kelly
It can serve as food for the polinator larvae, especially bees. Otherwise, it is lost.
Monday, October 1, 2007 at 7:56pm by bobpursley
English
We will be happy to critique (look that word up in a dictionary) your work. Repost it with your attempt to punctuate.
Sunday, September 23, 2007 at 5:38am by bobpursley
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
biology repost
Erin, the a solution is hypotonic (assuming .9 percent NaCl for plasma). I dont know what the albumin will do)>
Friday, March 6, 2009 at 9:50am by bobpursley
physics repost
Force*time= massball*changeinvelocty I am beginning to wonder if you are doing the algebra in your head and messing up there.
Thursday, April 3, 2008 at 9:31am by bobpursley
Law repost bobpursley
the pt is relased from the hospital and attacks Sally so the basis of the cliam would than be battery ?
Thursday, November 15, 2007 at 8:00am by Anonymous
English
Good start on #1; finish it and repost. #2 is correct, yes. #3 -- To turn "analysis" into a verb, use "analyze" (or "analyzes" or "analyzed"). Give #3 a try, and repost.
Tuesday, August 30, 2011 at 3:36am by Writeacher
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
information literacy
Ha. Copyright law does allow copying nothing, as much as you wish. Repost..type the choices.
Wednesday, September 14, 2011 at 3:23pm by bobpursley
Physics
draw the picure. Write coordinates for all the masses (use trig, if necessary). If you have questions then, repost.
Monday, November 15, 2010 at 10:50am by bobpursley
Physics repost please clarify
How far does light travel in .19ns? distanceerror=c*deltatime that will give you the distance error
Tuesday, October 16, 2007 at 1:07am by bobpursley
Physics repost
I dont get the picture. However, potentials can be added. Vtotal= V1 + V2 + V3 + .... where each V is charge/distance
Tuesday, September 4, 2007 at 10:08pm by bobpursley
Math
Bobpursley answered this for you a few minutes ago. Please repost if you have a specific question about his response.
Saturday, January 26, 2013 at 4:56pm by Ms. Sue
Repost- Biology
Oops.. typo for #4.. It should be.. Are the third-order heterotrophs consumed by fungal decomposers? My guess:Yes? Anyway, thanks,bobpursley!
Sunday, September 13, 2009 at 9:27pm by Anonymous
physics repost
didn't I answer this already? A horizontal circle with the string parallel to the Earth can only be attained in a gravity free environment
Thursday, April 3, 2008 at 9:28am by bobpursley
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
chem-repost
How many grams of magnesium oxide are formed when 13.5 L of oxygen gas, measured at STP, completely reacts with magnesium metal according to the following reaction? i got .496 g but i know that like way off
Thursday, February 17, 2011 at 8:29pm by hannah
physics, error calculation repost
error in what? I am uncertain of what your goal is.
Tuesday, March 8, 2011 at 6:56pm by bobpursley
Physics repost
netforce= 2*distance/time=2*.85/time^2=13.6N
Wednesday, November 14, 2007 at 8:04pm by bobpursley
chemistry
I will be happy to critique your thinking. Repost with your thinking.
Tuesday, September 23, 2008 at 12:02am by bobpursley
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