Wednesday
April 16, 2014

Search: drbob222

Number of results: 42,368

To DrBob222 impersonator
To the DrBob222 impersonator. If you use my name again for one of your unauthorized diatribes, I will (not shall) ban your computer from this board. I can and I will do it.
Wednesday, February 15, 2012 at 11:40pm by DrBob222

Chem - DrBob222 & drwls
Glad to be of assistance. Congrats and good luck.
Monday, October 8, 2007 at 12:12am by DrBob222

oops, too.
Sorry. It's still early for me. DrBob222 came out DrGog222.
Monday, July 27, 2009 at 1:32am by DrBob222

Science-DrBob222-Help
I would be interested in knowing if you think this is the correct approach.
Monday, January 25, 2010 at 9:32pm by DrBob222

math- DrBob222
See my response to your earlier post. I goofed.
Saturday, July 11, 2009 at 10:13pm by DrBob222

To DrBob222
DrBob222 do you know anything about Heredity and Punnet Squares?
Wednesday, June 9, 2010 at 9:52pm by Sara

Chemistry
See comments by Bob Pursley and DrBob222 above.
Wednesday, October 6, 2010 at 7:14pm by DrBob222

Science- Ms. Sue or DrBob222?
I agree with all of your answers.
Wednesday, October 2, 2013 at 3:48pm by DrBob222

Attn: DrBob222
I get a similar answer but not the same. I obtained 0.00358 moles Ar.
Thursday, March 4, 2010 at 1:17pm by DrBob222

Drbob222
I'm not a good source of information for the organic questions you want to know. I've looked at your posts and passed them by.
Saturday, November 27, 2010 at 10:30pm by DrBob222

DrBob222
See your original post. The half life is given in the problem as 7.2 minutes.
Tuesday, April 12, 2011 at 11:49pm by DrBob222

DrBob222
You didn't post anything here. What other screen name are you using (where you have them posted).
Monday, April 5, 2010 at 9:27pm by DrBob222

CHEM (DrBob222)
I don't find it and don't remember enough to respond.
Monday, November 26, 2007 at 12:10am by DrBob222

To: DrBob222
I posted a response to the periodic table and ions.
Thursday, April 8, 2010 at 10:59pm by DrBob222

Chemistry-DrBob222
yes, <7, and for all the reasons you gave.
Tuesday, October 12, 2010 at 7:24pm by DrBob222

Chemistry-DrBob222
Logan is right. It's a strong acid.
Tuesday, October 12, 2010 at 7:16pm by DrBob222

CHEMISTRY: URGENT DRBob222
To prevent hydrolysis of the ester.
Thursday, March 14, 2013 at 8:45pm by DrBob222

Chemistry -- DrBob222
Yes, your answer is correct. The 50 C is the 323 K.
Friday, May 24, 2013 at 12:30pm by DrBob222

Chemistry- DrBob222
All of your work looks good to me.
Tuesday, October 22, 2013 at 6:50pm by DrBob222

College Chemistry (DrBob222)
See your post below.
Tuesday, March 25, 2014 at 4:52pm by DrBob222

DrBob222
DrBob222 I am kind of stuck with the balancing stuff, and I already had send the post, did you not read it?
Thursday, July 15, 2010 at 10:46pm by Derrick

Where is DrBob222?
Hey does anyone know when DrBob222 comes on here, cause I have a lot of chemistry questions which I need him to check. Thanks.
Monday, October 11, 2010 at 7:42pm by Anonymous

oops--TO DrBob222 or any science helper
I typed in C6H8O and not C6H8O7. So those three "possibilities" I gave you won't fit.
Wednesday, March 12, 2014 at 9:58pm by DrBob222

Chem II
above posted by DrBob222
Thursday, February 14, 2008 at 3:56pm by DrBob222

O-CHEM
Answered above by DrBob222 AND GK.
Tuesday, February 3, 2009 at 11:27pm by DrBob222

chemistry (DrBob222)
See your other post.
Monday, November 21, 2011 at 1:31pm by DrBob222

TO DrBob222 or any science helper
yes, citric acid.
Wednesday, March 12, 2014 at 9:58pm by DrBob222

Ion charge & formulas of ionic compunds-DrBob222
Thank you very much DrBob222. You've helped me a lot, and I really appreciate that:-)
Tuesday, April 20, 2010 at 10:35pm by Sara

chemistry
To the DrBob222 impersonator. If you use my name again for one of your unauthorized diatribes, I will (not shall) ban your computer from this board. I can and will do it.
Wednesday, February 15, 2012 at 11:40pm by DrBob222

DrBob222
I read it and responded. It takes time to think these things through and write them down, especially when we are trying to type in subscripts and superscripts.
Thursday, July 15, 2010 at 10:46pm by DrBob222

DrBob222
Thank you very much DrBob222, if I ever get stuck again, I'll be sure to ask you, but before that I'll try to figure out the problems myself as a challenge. Thank you
Thursday, July 15, 2010 at 10:46pm by Derrick

Chemistry
Above posted by DrBob222.
Monday, January 7, 2008 at 8:34pm by DrBob222

Chemistry
The above posted by DrBob222.
Friday, February 15, 2008 at 9:54am by DrBob222

To DrBob222
It isn't a whole number. 14*1/4 = 3.5
Tuesday, September 22, 2009 at 12:34am by DrBob222

To DrBob222
I've looked several times and I can't help.
Monday, May 3, 2010 at 11:09pm by DrBob222

Chemistry-DrBob222
You're right again.
Tuesday, October 12, 2010 at 7:14pm by DrBob222

To DrBob222
nothing. sorry.
Wednesday, June 9, 2010 at 9:52pm by DrBob222

Chemistry(DrBob222)
I don't know enough about what you did to answer; however, my first educated guesses are (1) the procedure is no more precise than that or (2) you're still learning the procedure.
Monday, December 9, 2013 at 7:24pm by DrBob222

Chemistry - DrBob222
Ba(OH)2 + Na2SO4 ==> BaSO4(white ppt.) + Na2SO4
Sunday, November 11, 2007 at 8:34pm by DrBob222

chemistry
No. I can guarantee you that Bob P and DrBob222 are NOT the same person. In fact, he and I live about 400 miles from each other. I just picked up your confusion over the nitrate ion because he wasn't on-line at the moment.
Sunday, October 24, 2010 at 5:24pm by DrBob222

Chemistry (DrBob222)
D represents the time it takes for the reactants to obtain enough energy to reach the peak of the activation energy needed to form the intermediate complex of B.
Sunday, June 17, 2012 at 7:50pm by DrBob222

Chemistry (DrBob222)
dG = -RT*lnK or dG = dH - T*dS As T increases dG becomes more negative.
Wednesday, December 4, 2013 at 9:37pm by DrBob222

math 4thgrade thanks DrBob222
Thanks a lot I get it now!!!!!! From Adam To DrBob222
Wednesday, November 15, 2006 at 8:13pm by Adam

Chemistry - DrBob222
Yes, AgCl is the way to go. See my other comments. This procedure will help you determine some of the ions but it will not allow you to determine some of them.
Sunday, November 11, 2007 at 8:34pm by DrBob222

Chemistry- DrBob222 Urgent Please help
I'm not an organic chemist; therefore, I'm not up to recent IUPAC standards so you should confirm whatever I write about organic. I would name these as follows: 1,4-butadiene 1-pentyne-3-ene 2-bromo-3-chlorohexane
Tuesday, November 26, 2013 at 10:42pm by DrBob222

Science-DrBob222-Help
I think you may be right, either way the question is to confusing to understand. It's giving to much information and then it doesn't really make sense to what they want to know. I think that's why I didn't get it! THANK YOU SO MUCH FOR ALL YOUR HELP DRBOB222!!
Monday, January 25, 2010 at 9:32pm by Susie

Chemistry-Repost for DrBob222
You can use the mg directly in the ratge equation. And I made a typo. That first line should have read, "Is that C60O3
Friday, March 21, 2014 at 2:06pm by DrBob222

Science-DrBob222
I really don't mind DrBob222 you tackling my post. Infact I think that maybe that would help me more. It might make me remember on what actually did happen during that lab experiment and what not. I would really appreciate your help:-)
Tuesday, April 6, 2010 at 8:33pm by Sara

DrBob222
Thanks for the thanks. In the future, it would help if you told us what you thought the answer was, or at least how you thought the problem should be attacked. Generally we try to HELP you find the answer rather than giving you the answer.
Friday, March 28, 2008 at 4:41am by DrBob222

CHEMISTRY: URGENT DRBob222
CH3COOH + HOCH2CH3 =>CH3COOC2H5 + H2O 3a. mol CH3COOH = M x L = about 0.80. b. initial = 0.500-0.08 ending = 0.420 c. 1.00-0.08 = 0.92 d. Substitute and calculate Kc.
Thursday, March 14, 2013 at 5:54pm by DrBob222

chemistry
Sorry I didn't post my name. My computer shut down, one reason I'm a little late in answering this, and it took a little time to get things back on track. When I first sign on, I get a name of anonymous unless I type in drbob222.
Tuesday, February 5, 2008 at 11:23pm by drbob222

For DrBob222
Yes, but 273.15 - 38.3 = 234.85 K which isn't your 247 something. . What you want is 559.15 K, the initial termperature, minus 38.3 (it is coled by that amount) = 520.85 K for T2.
Saturday, January 19, 2008 at 7:27pm by DrBob222

TO DrBob222 or any science helper
I don't know what that is. It's just another empirical formula. CH3COOH I recognize as acetic acid but C2H4O2 (the empirical formula for aca\etic acid) is not recognizable. There are so many compounds it can be.
Wednesday, March 12, 2014 at 9:58pm by DrBob222

for Drbob222
It isn't. mols = g/atomic mass. mols = 0.021/24.3 = ?? but you need to look up the atomic mass of Mg. Sometimes I don't remember that well.
Monday, October 29, 2007 at 4:51pm by DrBob222

Drbob222
What else do you want me to do? I gave you the formula. I identified the elements of each formula. The only thing I didn't do (and the only thing you have left to do) is the actual arithmetic. Do you want me to do the arithmtic, too
Tuesday, April 6, 2010 at 8:54pm by DrBob222

Chemistry
I made a typo in my response (transposed the numbers). The concn we calculated is 0.298 or so and to two s.f. that rounds to 0.30 (not 0.03 as I posted in my second post). I think 0.30 will get it for you. I would appreciate a new post to DrBob222 since this one is getting ...
Friday, March 2, 2012 at 8:13pm by DrBob222

Science- DrBob222
OK. Good. I always called that the "origin" but that may not be right. What you have is just 1/4 of a sheet of graph paper and you are looking at the upper right quadrant. If all four quadrants are there then the middle point is the origin. I just assumed that the origin was ...
Saturday, October 26, 2013 at 11:50pm by DrBob222

Chem
I obtained 0.299 but you have used 4.2E-10 for Kb which is just two significant figures. I would round the 0.298 you obtained to 0.30 and submit that. I would appreciate letting me know if this takes care of the problem. This post is getting buried so just make a new question ...
Friday, March 2, 2012 at 8:41pm by DrBob222

Chemistry(DrBob222)
dG = dH - TdS So if dG is more + it must mean the cost of breaking the crystal structure is more than the gain in the entropy by solid to solution; i.e. dH + and dS + and dH>-TdS
Monday, December 9, 2013 at 7:24pm by DrBob222

chemistry -drbob222
This is really out of my field but I think you make a difference by adding a soluble salt, such as NaCl, to the aqueous phase. That makes the polar solute, which is already more favorably inclined to go with the ether, less able to fill the "spaces" in the water solvent. Check...
Friday, October 9, 2009 at 5:48am by DrBob222

Chemistry- DrBob222
In brief, this is what you do. Let me know where you need additional help but show your work from the beginning to the point you need help. You need to convert 0.48g CO2 to g C. Convert 0.1636g H2O to g H (not H2). Convert 0.0618g NH3 to g N (not N2). a. gC + gH + gN = 0.2 ...
Saturday, November 30, 2013 at 9:52pm by DrBob222

To DrBob222(Please check Chem)
#4. I believe dissolv ing ammonium nitrate in H2O is a highly endothermic reaction. Look at the stam answer. #12. I think 10.8 kJ. Check me out on this. #14. I think you made a typo. The correct answer is not listed. I think you intended to write 3.16E-9 and not 3.16E9.
Thursday, June 21, 2012 at 11:34am by DrBob222

DrBob222 please check
DrBob222 please check my physics question posted at 8:55pm. The subject is drwl please check. I am not getting a response from drwl. Thanks! Mary DrWLS is not on right now. My physics is too poor to trust my answers. Bob Pursley is smarter than I am; he does physics, math, and...
Tuesday, February 27, 2007 at 9:24pm by Mary

Chemistry...Attn DrBob222
I found this. It may or may not help but further down the page it talks about log D in terms of pH, Ka, etc. http://en.wikipedia.org/wiki/Partition_coefficient Sorry I can't be of more help.
Friday, March 12, 2010 at 8:16pm by DrBob222

TO DrBob222 or any science helper
Doesn't it seem obvious it is an acid? Here is the formula. http://en.wikipedia.org/wiki/Citric_acid
Wednesday, March 12, 2014 at 9:58pm by DrBob222

chem: Drbob222
In a buffer made of H2PO4^- and HPO4^2-, addition of HCl adds to the base; i.e., H^+ + HPO4^2- ==> H2PO4^- and addition of NaOH adds to the acid. H2PO4^- + OH^- ==> H2O + HPO4^2- I hope this gets things straight.
Monday, January 30, 2012 at 4:34pm by DrBob222

To DrBob222
You need to tell me your problem. I worked the problem an hour ago. 2/3 * 1/4 = 2/12 = 1/6 at the end of the trip or you can use a number like 21 and go from there. If you use the number, then if the tank is full at 21, it started at 2/3 of that or 2/3*21 = 14. Then we used 1/...
Tuesday, September 22, 2009 at 12:34am by DrBob222

TO DrBob222 or any science helper
Here are three it could be. http://en.wikipedia.org/wiki/C6H6O
Wednesday, March 12, 2014 at 9:58pm by DrBob222

Chemistry - DrBob222
If it is -414 kJ/mol going in the forward direction it must be +414 kJ/mol going in the opposite direction.
Wednesday, June 5, 2013 at 9:55pm by DrBob222

chemistry (DrBob222)
I don't know how full the tube is at 2/3 full; however, if the fluid in the tube is completely irradiated by the beam then there is no effect. If the fluid in the tube is such that some of the beam goes through the fluid and some of the beam is outside the fluid, then the ...
Wednesday, October 9, 2013 at 12:15am by DrBob222

DrBob222 : need some clarification
Hi DrBob222, Could you please explain want you typed: *You must have 10 mmoles of that still un-titrated (you had 10 millimoles of the original and that is gone but you still have 10 mmols of the other acid remaining. Are you saying I have 10 mmoles of each acid, if so how did...
Tuesday, September 11, 2012 at 12:55am by ron

Chemistry - DrBob222
Ava. I'm not an organic chemist and I don't know the answer. I googled "free radical halogenation of alkanes" and came up with this. It may or may not help. http://en.wikipedia.org/wiki/Free-radical_halogenation
Tuesday, February 11, 2014 at 10:41pm by DrBob222

TO DrBob222 or any science helper
HCH3COO is acetic acid--acid NaCL is sodium chloride--salt H2CO3 is carbonic acid --acid C6H8)7 I can't interpret Mg(OH) is magnesium hydroxide--base NaOH is sodium hydroxide--base KBr is potassium bromide--salt Sr(OH)2 is strontium hydroxide--base HNO3 is nitric acid--acid
Wednesday, March 12, 2014 at 9:58pm by DrBob222

math,drbob222
I'm sorry the problems i posted had a couple of errors how i posted it here they are: Posted by DrBob222 on Friday, November 24, 2006 at 6:19pm in response to Math. Thanks for showing your work. It helps us to know where you are having trouble. #4. [25/ (2^3-3)]*2 the star two...
Saturday, November 25, 2006 at 11:41pm by Jasmine20

DrBob222
I have dS for system = 216.4 - 5.74 -2(223.0) = ? J/mol = -235.3 J/mol Check that. dS for surroundings = -dH/T = -(-139,000)/298 = 466.4 J/mol dS total (universe) = dS sys + dS surr = -235.3J + 466.4 = ? check that. Check the signs. Check the # s.f.
Thursday, March 15, 2012 at 12:41am by DrBob222

DrBob222 : Chemistry HElp...Please Check
You don't mean the molar mass is 0.03240, you mean the molarity is 0.03240. I get the same figures you do. So the solution of Na2S2O3 is 0.03240 M. By the way, I think you are limited to just the one zero as I have it written and not 0.032400. Since the 27.15 mL, 25.00 mL ...
Tuesday, October 21, 2008 at 9:48pm by DrBob222

DrBob222
The best advice I have is for you to verify those numbers from your text/notes. I took these from a text that is almost 20 years old; newer numbers may be in your text. That's what meant with my first post; I gave you the numbers I had and I hoped you would check them with ...
Thursday, March 15, 2012 at 12:41am by DrBob222

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 25C? chem - DrBob222, Tuesday, February 22, 2011 at 10:52pm q = mass water x delta Hvaporization. chem - Rebekah, Wednesday, February 23, ...
Wednesday, February 23, 2011 at 5:49pm by Rebekah

Chemistry DrBob222
My calculation shows 17.89 L which I would round to 17.9L. For mol = n you should have 27g Ne x (1 mol Ne/20g Ne) = 13.5 mol Ne. Showing the factor as I've shown it makes more sense than the way you do although yours is correct except for the K. (1 mol K should be 1 mol. The K...
Wednesday, May 29, 2013 at 1:11am by DrBob222

College Chemistry (DrBob222)
Yes, if you follow my directions above that will calculate Fe^2+. You have Eocell and Ecell which allows you to calculate Q. Then Q has the definition I gave and that has the concentrations in it. Q = (Fe^2+)/(Cu^2+). You know Q and Cu^2+, solve for Fe^2+. If you need help in ...
Sunday, April 6, 2014 at 8:55pm by DrBob222

Chemistry-DrBob222
I don't know the problem so I don't know what the answer to a is. For the ln(No/N) = akt problem see below. You know k = 0.00255/sec 2IBr ==> I2 + Br2 ln(No/N) = akt No = 1.50M from the problem. That's what you start with. N = The M at time t. a is the coefficient 2 for IBr...
Friday, January 28, 2011 at 1:04pm by DrBob222

Science-DrBob222-Help
I'm still confused; however, my thinking is this. Since it takes 1/8 second for the radio wave to hit your ear, the question may be asking "how far must your ear be from the singer for the sound wave to travel to your ear in 1/8 second?" That is d = r*t d = 343 m/s x 1/8 sec...
Monday, January 25, 2010 at 9:32pm by DrBob222

Question,drbob222,math
Drbob222, even if you just tell me that there is an answer to the following problem then i know that there is an answer because i've tried many ways and i can't get x alone. -4(2x-3) = -8x +5 Is there an actual answer for this one? No. There is no answer, the question is ...
Tuesday, December 19, 2006 at 12:34am by jasmine20

Chemistry- DrBob222
CH3-CH2-C(CH3)2-CH3-CH3 is the 3-3 dimethylpentane. So just move one of the methyl groups to make it 2,3-dimethylpentane or 2,4-dimethylpentane or put both CH3 group on the 2 C to make 2,2-dimethylpetane. For 3-methyl-4-ethyl-1-hexyne why not put methyl group on 3 and ethyl on...
Wednesday, November 13, 2013 at 9:02pm by DrBob222

Chemistry (w.e or DrBob222)
They look ok to me. Here is a simplified table summary I use. http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
Saturday, January 29, 2011 at 10:40pm by DrBob222

Chemistry - DrBob222
No. I don't remember the exact equation but I know the one I wrote for you that evening was correct. This one, the C has an oxidation state of -2 (4H=+4, 1 O = -2 so C must be -2) in CH3OH. It goes to zero on the other side with CH2O so it loses 2 electrons. Mn changes from +7...
Wednesday, February 20, 2008 at 6:40pm by DrBob222

DrBob222
We CAN write exponents like this. 22 = 4 23 = 8 but it's a lot of trouble to do that, so we write the ^ symbol (called a caret) to denote an exponent. Thus Cl^- means Cl- and Cr^+2 means Cr+2. Sulfate, for example, I write SO4^-2 and that is SO4= or SO4-2
Tuesday, April 20, 2010 at 11:13pm by DrBob222

Chemistry--DrBob222
I don't know. 115 cubic feet = 3256.4 liters. The conversion factor IS 28.317. 115 x 28.317 = 3256.4 http://www.onlineconversion.com/volume.htm
Monday, May 27, 2013 at 2:58pm by DrBob222

DrBob222-Questions
CaCl2 = Calcium ion and Chlorite ion You named MgCl2 magnesium chloride on the last post. Why would you not name this one calcium ion and chloride ion. Na2O = Sodium ion and Oxygen ion sodium ion and oxide ion AgCl = silver ion and chlorine ion silver ion and chloride ion ...
Tuesday, April 20, 2010 at 11:39pm by DrBob222

chemistry (DrBob222)
Opps, there is a typo when I typed out the problem. The equilibrium temperature in the first problem is supposed to be 39.6*C. For the 100 mL, I assume my teacher wants me to look up the denisty in the appendix of our lab notebook. Am I suppose to look up the density of water ...
Saturday, July 19, 2008 at 1:47am by Anonymous

For DrBob222
You're welcome.
Saturday, January 19, 2008 at 7:27pm by DrBob222

me
HI
Saturday, March 2, 2013 at 11:34pm by DrBob222

College Chemistry (DrBob222)
I presume you meant 25C and not 35. If you meant 35 then replace the 0.0592 below by (RT/2*F) Ecell = Eocell -(0.0592/2)log Q You have Ecell. Eocell = Eo for Cu^2+ + 2e --> Cu and add to Eo for Fe(s) ==> Fe^2+ + 2e That leaves Q. Q in this case is Q = (Fe^2+)/(Cu^2+) ...
Sunday, April 6, 2014 at 8:55pm by DrBob222

DrBob222 follow up
All of your work is correct on the data you show. And, of course, ZnCl2, is the correct answer. I don't know how the experiment was conducted; therefore, I can't suggest where the error may have occurred. Have you checked how you came up with 1.8 g Zn and 0.9 g chlorine? That'...
Monday, October 26, 2009 at 10:07pm by DrBob222

Chemistry
OK
Monday, June 30, 2008 at 7:35pm by DrBob222

Algebra1
So what is to be done?
Thursday, August 23, 2007 at 9:51pm by DrBob222

algebra2
no
Monday, August 27, 2007 at 9:04pm by DrBob222

Algebra 1
You're welcome.
Monday, June 30, 2008 at 11:01am by DrBob222

Algebra 1
of what?
Thursday, September 6, 2007 at 9:55pm by DrBob222

math
2.5 + 2.5 ----------- = 5 5 -- = 1 5
Monday, October 1, 2007 at 6:16pm by DrBob222

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