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April 20, 2014

Search: For Dr.Bob222

Number of results: 2,898

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 probably ...
Friday, February 8, 2013 at 5:58pm by Devron

For Dr.Bob222 (chem work)
Dr. Bob, where did you get the 0.150L from? I will keep my eyes open for the explanation as well.
Monday, August 27, 2007 at 11:17pm by Gulzaman

Thank you Dr.Bob222
I love Dr Bob also.
Thursday, November 11, 2010 at 2:05pm by bobpursley

Stoichiometry
Dr.Bob222 is right. Rodney, your answer is wrong. I just did this problem online and the correct answers were the one that Dr.Bob22 gave.
Tuesday, October 4, 2011 at 11:20pm by Jenny

:)
Thank you Dr.Bob222
Tuesday, November 30, 2010 at 2:31pm by Tosha

chem
thank Dr.Bob222
Saturday, March 8, 2008 at 8:39pm by Anonymous

Science
THANK YOU DR. BOB222
Monday, September 28, 2009 at 8:27pm by JADEN

science
Thanks Dr.Bob222
Wednesday, February 10, 2010 at 7:21pm by JADEN

Chemistry
Thank you Dr.Bob222!!!
Saturday, May 1, 2010 at 12:48pm by Anonymous

Thank you Dr.Bob222
Many thanks to both of you.
Thursday, November 11, 2010 at 2:05pm by DrBob222

algebra
anywayz... thanx dr.bob222
Tuesday, November 18, 2008 at 8:11pm by taylor

general chem
THank YOu Dr.BoB222
Sunday, October 9, 2011 at 10:45am by rob

chem
thanks Dr.Bob222 you're the best
Friday, November 9, 2012 at 3:12pm by byke

chemistry=>Dr.Bob222
Okay!!!!!!!
Wednesday, August 7, 2013 at 11:46pm by Devron

8th grade math
Thanks Dr. Bob222.
Wednesday, September 30, 2009 at 12:34pm by kendall

Dr.Bob222
Thank you so much DrBobb for all of your help!!
Tuesday, October 27, 2009 at 11:43am by Brittany

Science
Dr Bob222 i can not see anything
Tuesday, October 12, 2010 at 11:50pm by paul

Chemistry-Help Dr. Bob222
The problem was 6.4 x 10^-6. Thanks
Tuesday, December 14, 2010 at 4:03pm by Maddy

science
dr.bob222 i dont get it can u give me the answer
Sunday, November 15, 2009 at 10:10pm by sophie

chemistry
6.022 x 1023 atoms. Thank you Dr Bob222
Wednesday, November 30, 2011 at 4:46pm by christine

For: Ms. Sue, Steve, Writeatecher, Dr.Bob222
Your welcome. :D
Wednesday, October 31, 2012 at 2:39pm by Jman

Dr. Bob222 G-Chem
To just round up
Wednesday, February 6, 2013 at 7:10pm by Devron

Chemistry(Dr.Bob222)
Does the [H+]=[OH-] at the midpoint or the equivalence point?
Wednesday, November 20, 2013 at 10:27pm by K

Chemistry - Science (Dr. Bob222)
I've worked this below.
Tuesday, March 25, 2014 at 6:38pm by DrBob222

Chemistry-Help Dr. Bob222
Would that still equal a pH of 3.1?
Tuesday, December 14, 2010 at 4:03pm by Maddy

Electrochemistry
^ Sorry Dr.Bob222 on behalf of these people from UCI
Friday, May 16, 2008 at 1:00am by anon

Chemistry
Dr.Bob222, You could have just posted a solution.
Saturday, January 26, 2013 at 6:04pm by Devron

Dr. Bob222 G-Chem
I've never heard of either by the way.
Wednesday, February 6, 2013 at 7:10pm by Devron

Chemistry
Thank you so much Dr.Bob222. You have my eternal gratitude.
Thursday, March 14, 2013 at 11:57pm by John

chemistry
Dr. Bob222 already answered this is your previous post.
Saturday, July 27, 2013 at 12:44am by Devron

CHEMISTY
Dr. Bob222 I'm not following. Would you please further explain? Thanks
Monday, July 21, 2008 at 10:22pm by Persia

For: Ms. Sue, Steve, Writeatecher, Dr.Bob222
same here.
Wednesday, October 31, 2012 at 2:39pm by DrBob222

Chemistry-Dr.Bob222
I calculate 4 drops, so I think I may be doing something wrong.
Sunday, March 17, 2013 at 9:29pm by Devron

Chemistry(Dr.Bob222)
What does it mean for something do to be neutralized? Is that when the [H+]=[OH-]? or is that totally wrong?
Wednesday, November 20, 2013 at 10:27pm by K

Chemistry - Science (Dr. Bob222)
See your other post above.
Wednesday, April 16, 2014 at 7:02pm by DrBob222

Working in the science industry
thankyou Dr Bob222 and writeacher. All the best.
Wednesday, October 13, 2010 at 12:14am by paul

Chemistry-Help Dr. Bob222
Thanks, totally still confused. I don't know how to solve for (x) since I don't know what the acid is?
Tuesday, December 14, 2010 at 4:03pm by Maddy

Chemistry==> Dr. Bob222
Should say over the past month.
Thursday, August 1, 2013 at 11:37am by Devron

For: Ms. Sue, Steve, Writeatecher, Dr.Bob222
You're very welcome, Jman. And thank you for this nice note.
Wednesday, October 31, 2012 at 2:39pm by Ms. Sue

chemistry - (Dr. Bob222)
No, they did not provide any reaction for this problem. If I'll find the solution, I'll post it here. Thank you for your help.
Wednesday, April 16, 2014 at 7:25pm by Ana

chemistry
thank you Dr. Bob222, i dont know how you manage to answer everyone's questions but you are one amazing person :)
Sunday, June 6, 2010 at 2:47am by its me

chemistry - (Dr. Bob222)
I did that and but I got 1.52 mol/L rather 0.97 (as the answer key provides it)
Wednesday, April 16, 2014 at 7:25pm by Ana

Chemistry
Dr.Bob222 - You are absolutely right. It totally slipped my mind that 0.3 has ONE sigfig. Thank you.. your help is much appreciated!
Sunday, May 9, 2010 at 9:36pm by Jake

Chemistry
Dr.Bob222 - You are absolutely right. It totally slipped my mind that 0.3 has ONE sigfig. Thank you.. your help is much appreciated!
Sunday, May 9, 2010 at 9:36pm by Jake

For: Ms. Sue, Steve, Writeatecher, Dr.Bob222
Appreciate the thanks. Always happy to help someone who's stuck, but trying.
Wednesday, October 31, 2012 at 2:39pm by Steve

chem
If you search around, Dr. Bob222 has posted some nice links on how to solve these types of problems.
Tuesday, March 19, 2013 at 7:43pm by Devron

Chemistry (Dr.Bob222)
Ok thanks, yes that answer was right, thanks so much for explaining the equation to me, it makes total sense now!
Thursday, November 7, 2013 at 5:41pm by K

Chemistry partial molar volumes
Thank you very Much Dr.Bob222 for your help and answer. Really appreciate the timing and response.
Wednesday, August 24, 2011 at 8:11pm by Urgent pls.

chemistry
Dr.Bob222, so, i had to use 50 mL of HCL and NaOH. (2M), so i would do Qrxn/0.1 mol
Sunday, January 8, 2012 at 12:08pm by AP Chemistry Question

NEED HELP ELECTRONICS
i will admit this posting is pretty ridiculous just have a fever hard to think but thanks dr bob222
Thursday, July 19, 2012 at 9:47pm by Ron

chemistry *Dr.Bob222
Why do firefighters recommend the use of a deluging volume of water when extinguishing an oxidizer-supported fire?
Saturday, December 22, 2012 at 8:43pm by Cameron

Analytical Chemistry
Setup is correct, but substitute 7.198. That should change 1.19x10^-5 to 1.78 and do what Dr.Bob222 told you to do.
Friday, February 22, 2013 at 7:05pm by Devron

chemistry (Dr.Bob222)
Ok, so when doing a serial dilution, would you day that the first well with no ppt represents a perfectly saturated solution, why or why not?
Monday, November 25, 2013 at 10:40pm by K

chemistry (Dr.Bob222)
In general, no. In whatever sense you're talking about, perhaps. I'm trying not to buy a pig in a poke here.
Monday, November 25, 2013 at 10:40pm by DrBob222

College Gen. Chemistry - Science
Dear Dr Bob222, Thank you so much! The answer is 35.5 mL on H2O has evaporated.
Tuesday, March 25, 2014 at 4:47pm by Anonymous

Chemistry (Dr.Bob222)
Just Kidding I got 46.51, but that is not one of the answer choices, so which would I pick? or did I do it wrong?
Thursday, November 7, 2013 at 5:41pm by K

Chemistry
Read it halfway; I thought it was going to say making a solution to 171mL using 134mL of the previous. Dr. Bob222 is correct.
Tuesday, March 19, 2013 at 9:49pm by Devron

Chemistry (Dr.Bob222)
How can you tell if a salt is neutral? Like the examples you gave: NaCl, KCl and KNO3, how do you know their anions or cations won't hydrolyze
Saturday, November 2, 2013 at 7:34pm by K

math
Than you all. Dr. Bob222 that was exactly what I was missing, I could not see where the 2 minuses where together since our teacher explained it differently. This was very clear. Thank you.
Tuesday, September 15, 2009 at 3:02pm by Anonymous

Chemistry - Science (Dr. Bob222)
Can't you simply plug in k1 and k2 along with T1 and T2 and solve for activation energy with the Arrhenius equation?
Wednesday, April 16, 2014 at 7:18pm by DrBob222

chemistry
Not sure who told you that but I am pretty sure that Dr.bob222 and I were both correct.
Thursday, February 28, 2013 at 8:05pm by Devron

Thank you Dr.Bob222
Thank you, you don't know how much you have help me with my chem class...thank you so much..your the best!!
Wednesday, November 10, 2010 at 8:03pm by julia

Thank you Dr.Bob222
Thank you, you don't know how much you have help me with my chem class...thank you so much..your the best!!
Thursday, November 11, 2010 at 2:05pm by julia

For: Ms. Sue, Steve, Writeatecher, Dr.Bob222, & bobpursy
bobpursy too.
Wednesday, October 31, 2012 at 2:39pm by Jman

G-chem/org. chem=>Dr. Bob222
I mean are setups differ for part 1
Friday, February 8, 2013 at 5:58pm by Devron

chemistry - (Dr. Bob222)
[1/(A)] - [1/(Ao)] = kt k is given in seconds; therefore, change 2.5 minutes to seconds.
Wednesday, April 16, 2014 at 7:25pm by DrBob222

SS7R - Corrects!
1. DR 2. F 3. F 4. DR 5. DR ~~~~~~~~~~~~~~~~~~~~~ 6. F 7. DR 8. DR 9. DR 10. F Read my last post below (Social Studies 7R - Please Read!). Are these are correct??? Some of them I change the answers
Tuesday, April 3, 2012 at 8:45pm by Laruen

chemistry
Since I don't know what figure you are referring to in your later post, I do not want to try and help you solve that one. Maybe Dr. Bob222 will assist you with that one.
Sunday, July 28, 2013 at 7:33pm by Devron

Chemistry Dr.Bob222==> Take a Look
I don' remember enough about the assignments of wavelengths to be of any help with the IR and I haven't had any experience with the NMR relative to structure.
Friday, January 25, 2013 at 12:42am by DrBob222

Chemistry
Okay, I made an accounting error. I calculated a Ka2 value different from yours and am not sure that it is correct. I would repost this question if Dr. Bob222 doesn't answer this soon.
Monday, February 25, 2013 at 6:27pm by Devron

Dr. Bob222 G-Chem
Okay, never mind. The ratio of C to H is 1 to 1.5, you have to multiply it by 2, and you get C2H3 to get whole numbers; 1.5 is to far from being a whole number.
Wednesday, February 6, 2013 at 7:10pm by Devron

Chemistry
I believe its products - reactants, but I am not sure. maybe Dr. Bob222 will come along and give you the right answer. 29.4- 828.6=-819.2kj/mol Exothermic reaction.
Wednesday, January 23, 2013 at 11:58pm by Devron

Chemistry Dr.Bob222==> Take a Look
what is this compound, it has a mf of c6h12o i. imgur. com/gCgw0Hi. png What may be the structure from the IR and H NMR data? This question is bugging me.
Friday, January 25, 2013 at 12:42am by Devron

Dr.Bob222 Chem
So increasing T from 20 to 70 we increase rate by approximately 25/sup> = 32 times faster. This part here is why I am asking about an equation.
Friday, February 1, 2013 at 10:15pm by Devron

Chemistry
Well use KE=3/2kT where K = 1.38E-23 plug and chug as dr arrasisham and dr edwards and dr busiglo and dr funskez and dr dj say
Sunday, January 24, 2010 at 3:28am by DrBob222

To Dr.Bob222
Is teh answer for teh nine protons and 10 electrons thing F^1- Yes, I answered to that effect at the original post. Its the fluoride ion.
Sunday, October 15, 2006 at 12:34pm by Googly Eyez

dr.bob222
when you get a small little chance can you check my math in last message i posted. thank you. I read the post earlier but didn't post a response because I was confused by the c in the formula.
Tuesday, January 30, 2007 at 4:56pm by Jasmine20

Chemistry
Thanks you Dr.Bob222. So the overall idea is that dissociation decreases molar mass and association does the opposite when a solute dissolves in a solvent. (How do you identify if either reaction occurs? Just wondering.)
Saturday, February 2, 2013 at 1:01am by Ahmad

Gr.12 Chem - DR. BOB222
WHAT DO YOU MEAN MORE KNEADING? and that would cause it to become harder right and not as runny? so if I kneaded less it would be runnier? if so why is this?
Wednesday, May 28, 2008 at 2:40pm by Heidi

GK or Dr.Bob222...Chemistry please help...
12.7 is the mass of NaOCL/100 mL bleach ..omg just ignore the 3 i was working on a different question which has KIO3- so mixing every up.
Thursday, October 23, 2008 at 6:30pm by Saira

Chemistry-Help Dr. Bob222
The equation I'm trying to use looks like this: 1.0 x 10^-14 divided by 6.4 x 10^-6 which gives me a solution of 1.5625 x 10^-9 which can't be right!
Tuesday, December 14, 2010 at 4:03pm by Maddy

physics gauss law
E = -dV/dr = - w g which is constant so at any r find the charge inside from Gauss E * (4/3)pi r^2 = Q/eo Q = (4/3) pi r^2 eo E so Q(r) = -w g (4/3) pi eo r^2 Q(r+dr) = - w g (4/3) pi eo (r^2+2 r dr + dr^2) so charge between spheres = Q(r+dr)-Q(r) = -w g (4/3) pi eo (2 r dr + ...
Monday, October 20, 2008 at 6:03pm by Damon

Dr. Bob222 G-Chem
I rounded 1.5 to 2, which is what you should do when they ask for the empirical formula. So, wouldn't the empirical formula be CH2 not C2H3?
Wednesday, February 6, 2013 at 7:10pm by Devron

Analytical Chemisty
I'm not sure if you are asking for the normality of Fe, but if you are use NV=NV, and solve for N N=[(500x10^-3 l)(0.13N)]/48.86 x 10^-3 L N= 1.33N Hopefully Dr.Bob222 checks this and corrects it if it is wrong.
Saturday, February 2, 2013 at 7:39pm by Devron

Calculus (check my work)
well, let me do the second part slowly C = 2 pi r dC = 2 pi dr so dC/(2 pi r) = dr/r or dC/C = dr/r which any architect will tell you dA = C dr dA/A = C dr/A dA/A = C dr/(pir^2) dA/A = 2 pi r dr/(pi r^2) dA/A = (2)dr/r SO dr/r = (1/2) dA/A Important if dA/A = 3% then dr/r = ...
Tuesday, December 17, 2013 at 6:52pm by Damon

chemistry - Please help
Dr. Bob222, Ok, I'm starting to see how to get the oxidation numbers. However, since S goes from -2 to+6, does it also oxidize? is it possible that both can oxidize? I thought one oxidized while the other reduced.
Saturday, January 19, 2013 at 11:42am by Sushmitha

Chemistry - Science (Dr. Bob222)
I have calculated K1 and K2 by dividing initial rate to initial concentration [A2], and I solved for Ea but for some reason I don't get the right answer, (which is 10.2KJ)
Wednesday, April 16, 2014 at 7:18pm by Ana

Chemistry
DR.BOB222 ENGLISH PLEASE?????? I know how to get the beta decay for strontium. just having a hard time with the concentration of strontium and the amount of yrs. passed....please help!!
Friday, November 11, 2011 at 6:47pm by Mindy

Chemistry
Solve it the way that Dr. Bob222 recommended. He is Jiskha's expert in chemistry; I just come on here and play around with science questions from time to time.
Tuesday, March 19, 2013 at 8:10pm by Devron

GK or Dr.Bob222...Chemistry please help...
SO it for every 1 mol of ClO3- there is 1 mol of I2 : Therefore, even the NaClO is 0.0008586 multiplied by molar mass is 0.06391 and then multilplied by (100/.05) is 12.78
Thursday, October 23, 2008 at 6:30pm by Saira

Dr.Bob222 Chem
Got it. I had to reread the original problem to see what went on. I haven't had use for some of these calculations and years, so some concepts are fuzzier than others.
Friday, February 1, 2013 at 10:15pm by Devron

chemistry (Dr.Bob222)
The first sentence ending with the question mark makes sense. The rest does not. The answer to the first sentence is No, serial dilution may start at any concn one chooses.
Monday, November 25, 2013 at 10:40pm by DrBob222

Chemistry Dr.Bob222==> Take a Look
Okay, it just bugged me. I think I solved it, but two of the peaks for protons in the H NMR spectrum weren't split like I thought they would be, and so I wasn't sure when I gave the individual a final answer after several attempts.
Friday, January 25, 2013 at 12:42am by Devron

For Dr.Bob222 (chem work)
You had 120 mL of acetic acid and added 30 mL NaOH which make a total of 150 mL or 0.150 L.
Monday, August 27, 2007 at 11:17pm by DrBob222

Chemistry (Dr.Bob222)
ok, so I got 3.32, so would I just multiply that by the half-life? Because the answer choices are 28 days, 14 days, 42 days, 56 days, and 70 days
Thursday, November 7, 2013 at 5:41pm by K

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

chemistry - (Dr. Bob222)
The rate constant for a second order reaction has the value of 2.5 x 103 Lmol1s1. If the initial concentration of reactant is 3.5 molL-1, what will be the molar concentration of the reactant after 2.5 minutes?
Wednesday, April 16, 2014 at 7:25pm by Ana

Chemistry (Dr. Bob222)
How can you tell if something is highly concentrated or lowly concentrated? For example: H2CO3, H+, HCO3-, CO3(2- charge), is in order of highest concentration to lowest concentration, can you explain why it is that order? Thanks for your help :)
Saturday, November 2, 2013 at 3:23pm by K

Chemistry
Dr.Bob222, I've been attempting the problem I posted previously about the ferrous ammonium sulphate, but I'm having no luck. I'm having trouble with my balanced equation. Do you mind showing me how to do the balanced equation? Thank you
Monday, November 2, 2009 at 5:24pm by rasuka_geo

college general chemistry
That should have been the question that I asked instead of posting the correct answer with the number of correct sig figs. Dr. Bob222 is excellent, and I l have been learning from him as well.
Saturday, February 2, 2013 at 10:22pm by Devron

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