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April 19, 2014

Search: Science/CHEM

Number of results: 67,148

chemistry=>Dr.Bob222
I was wondering why the individual ask the question when it seemed kind of straight forward. Sometimes I want to answer a question, but I am not sure what they are asking, or I'm not sure concerning the concept if I haven't done a particular type of problem in a while. So, I ...
Wednesday, August 7, 2013 at 11:46pm by Devron

Biology (Science)
Why is water a polar molecule? Please read: (Broken Link Removed) AND http://ghs.gresham.k12.or.us/science/ps/sci/ibbio/chem/notes/chpt2/polar.htm
Monday, September 25, 2006 at 6:46pm by Dakota

science (chem)
I'm actually doing a homework assignment where you have to draw the structure into program...it's killer..I drew it with the double bond and the computer said incorrect. It's for organic chem. I'll try the triple bond and see what happens...I don't like drawing on the computer...
Friday, August 31, 2007 at 10:01pm by ~christina~

science (chem)
I'm actually doing a homework assignment where you have to draw the structure into program...it's killer..I drew it with the double bond and the computer said incorrect. It's for organic chem. I'll try the triple bond and see what happens...I don't like drawing on the computer...
Friday, August 31, 2007 at 10:01pm by ~christina~

Chem
Chemistry - A mixture of chromium and zinc weighing .362 g was reacted with an ... chemistry - Plastic articles can be chromium-plated by coating them with thin ... chem - Zinc dissolves in acid according to the balanced equation. Zn(s)+ 2H(aq... chem - Zinc dissolves in acid ...
Sunday, February 25, 2007 at 5:26pm by Anonymous

Chem
Chemistry - A mixture of chromium and zinc weighing .362 g was reacted with an ... chemistry - Plastic articles can be chromium-plated by coating them with thin ... chem - Zinc dissolves in acid according to the balanced equation. Zn(s)+ 2H(aq... chem - Zinc dissolves in acid ...
Sunday, February 25, 2007 at 5:26pm by Anonymous

Chem
Chemistry - A mixture of chromium and zinc weighing .362 g was reacted with an ... chemistry - Plastic articles can be chromium-plated by coating them with thin ... chem - Zinc dissolves in acid according to the balanced equation. Zn(s)+ 2H(aq... chem - Zinc dissolves in acid ...
Sunday, February 25, 2007 at 5:26pm by Anonymous

science
Thank you for using the Jiskha Homework Help Forum. Hopefully the following will assist you: 1. (Broken Link Removed) 2. http://en.wikipedia.org/wiki/Polymer_chemistry 3. http://chem.chem.rochester.edu/~chem421/famous.htm
Tuesday, April 22, 2008 at 6:06pm by SraJMcGin

chem/science
Please predict what will happen. Im not very good in chem. Iron metal and pb(NO3) Lead metal and Mg(9NO3)2 Copper metal and AL(NO3)3 Lead metal and AgNO3
Thursday, April 18, 2013 at 8:44pm by jim

science (chem)
an addition to this is Why doesn't my lab in organic chem use plastic pipettes? Is it going to react with the organic solvent if you do use it instead of glass? And it's kind of annoying that the liquid in the pipette has a tendency to go into the bulb while I'm transfering ...
Sunday, September 9, 2007 at 10:16pm by ~christina~

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 degree and I...
Tuesday, March 25, 2008 at 9:50pm by ~christina~

science(chem)
I was thinking that they were the same but wasn't sure since the examples in the program were only of flipping the structure vertically not horizontally and I wanted to be sure since I haven't done organic chem in a long time. If it was a constitutional isomer wouldn't they ...
Friday, August 31, 2007 at 10:31pm by ~christina~

science(chem)
Oh..okay.
Monday, May 5, 2008 at 12:14am by ~christina~

science (chem)
What solvents?
Sunday, September 9, 2007 at 2:39pm by DrBob222

science(chem)
Thank You Bob
Sunday, October 7, 2007 at 10:07pm by ~christina~

science-chem
for part a? and how did you get that? thanks.
Thursday, September 17, 2009 at 5:24pm by Ally

science(chem)
university
Monday, July 16, 2007 at 4:23pm by sanad

SCIENCE/CHEM
right
Wednesday, May 12, 2010 at 9:12pm by DrBob222

science (chem)
lol
Friday, June 22, 2007 at 7:27pm by jh

science(chem)
what is a distribution coefficent?
Saturday, September 8, 2007 at 10:59pm by ~christina~

science(chem)
Thanks Dr.Bob =)
Thursday, September 27, 2007 at 10:49pm by ~christina~

science(chem)
okay Thanks Dr.Bob
Sunday, November 4, 2007 at 4:40pm by ~christina~

science (chem)
Oh and Thank you for your help Dr.Bob =D
Wednesday, February 27, 2008 at 10:04pm by ~christina~

science(chem)
Thank you Dr.Bob
Friday, March 28, 2008 at 5:30pm by ~christina~

science(chem)
Thanks Dr.Bob
Monday, April 14, 2008 at 5:44am by ~christina~

science-chem
correct on both.
Thursday, September 17, 2009 at 3:08pm by bobpursley

science /chem
1.250X10^3 ....hows that???
Wednesday, May 12, 2010 at 9:08pm by Andy

science /chem
yup that's right
Wednesday, May 12, 2010 at 9:08pm by Bob

Science/Chem
2.408E24
Sunday, February 4, 2007 at 7:22pm by Griselda Gandarilla

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

Science (chem)
Oh..so that's how that works.. Thank you Dr.Bob =)
Sunday, September 30, 2007 at 8:06pm by ~christina~

science(chem)
Oh...alright then.. Thanks Dr.Bob =)
Monday, October 8, 2007 at 10:54pm by ~christina~

science(chem)
Note: it's on pg 1 currently
Saturday, February 16, 2008 at 9:52pm by ~christina~

science(chem)
I don't know that it's different. I've not used one.
Friday, March 28, 2008 at 5:30pm by DrBob222

science-CHEM
Thanks a lot!!! I think I got it!!!
Friday, November 21, 2008 at 1:23pm by Nicola

science-chem
25 mL = .025 L, not .25L
Thursday, September 17, 2009 at 5:24pm by J

science(chem)
Thanks for clearing that up, Dr.Bob =D
Sunday, September 2, 2007 at 6:38pm by ~christina~

science(chem)
For #2 nothing would happen then right?
Sunday, September 2, 2007 at 9:11pm by ~christina~

science(chem)
I forgot to say Thank You Dr.Bob =D
Monday, September 3, 2007 at 12:23am by ~christina~

science(chem)
Thank you very much Dr.Bob =D
Monday, October 8, 2007 at 12:26am by ~christina~

science
help with the chem lab. the molecular of a volatile liquid.
Thursday, November 29, 2007 at 8:30pm by Bmt

science(chem)
Thanks very much Dr.Bob
Thursday, April 10, 2008 at 12:00am by ~christina~

Science (chem?), not "10th grade"
assistance needed
Sunday, February 8, 2009 at 8:24pm by Writeacher

Science (Organic chem)
You don't provide enough information to know what you are doing or what you want.
Monday, April 26, 2010 at 11:11pm by DrBob222

SCIENCE/CHEM
how many electrons can be contained in all orbitals with n=4??????
Wednesday, May 12, 2010 at 9:12pm by Andy

SCIENCE/CHEM
Max number electrons = 2N^2
Wednesday, May 12, 2010 at 9:12pm by DrBob222

science(chem)
Hm..I'll look for one then. Thanks Dr.Bob =)
Monday, September 3, 2007 at 12:23am by ~christina~

science (chem)
Thanks Dr.Russ your tips really helped =D
Sunday, September 9, 2007 at 10:16pm by ~christina~

science (chem) Rf values =(
So I guess Nobody can help me out..? =(
Sunday, October 14, 2007 at 5:33pm by ~christina~

science(chem)
No, w/w is 5 g NaHSO3 + 95 g solvent for 100 g solution.
Sunday, November 4, 2007 at 4:40pm by DrBob222

science (chem)
Is it due to it producing water in the rxn product?
Wednesday, February 27, 2008 at 10:04pm by ~christina~

science(chem)
Well, you don't need solvent and you just use the sample as is.
Friday, March 28, 2008 at 5:30pm by ~christina~

science(chem)
I'll see how I do with that site, first. Thanks Dr.Bob
Sunday, September 21, 2008 at 11:28pm by ~christina~

science (chem)
Na2CO3+2HClO4-2NaClO4+H2O+2CO2
Sunday, June 24, 2007 at 9:37pm by Anonymous

science-chem
i think 2.3 mL of naCI/L hydrocholric acid
Thursday, September 17, 2009 at 5:24pm by anonymous

science (chem)
hulk smash the methylene chloride until it evaporates
Sunday, September 9, 2007 at 2:39pm by !@#$%^&

science(chem) Dr.Bob-> need help on this long lab
HI
Tuesday, March 11, 2008 at 5:27pm by MP

science(chem)
Is it 5g of the sodium bisulfite mixed with 100ml of solvent?
Sunday, November 4, 2007 at 4:40pm by ~christina~

science /chem
1250.37986 rounded to four significant figures is ??????
Wednesday, May 12, 2010 at 9:08pm by Andy

science/chem
Why do the d and f block elements have only 2 valence electrons?
Monday, February 21, 2011 at 8:18pm by missy

Science: Chem
The dilution formula is mL1 x M1 = mL2 x M2
Tuesday, November 1, 2011 at 10:36am by DrBob222

science; AP Chem
oooh okay, i didn't know how to do an equation that involved vapor pressure. Thank you!
Friday, September 14, 2012 at 2:37pm by Anonymous

Advice...about chemistry degree Dr.Bob
Based on the question topic posted by Britney below titled:In your opinion (your answer to this reminded me of something) (I posted the same thing there but I thought it was improper to piggyback on that post so I posted this under a new topic) I don't know where to start but ...
Tuesday, March 25, 2008 at 11:20pm by ~christina~

Science 4th grade
Nope. Fungi are often colorless -- like mushrooms. Check this site. http://scifun.chem.wisc.edu/CHEMWEEK/CHLRPHYL/Chlrphyl.html
Wednesday, September 3, 2008 at 9:19pm by Ms. Sue

science(chem)
wait..isn't bolding [b]?? I thought it was..why didn't it work?? did I type something wrong??
Saturday, October 13, 2007 at 7:51pm by ~christina~

science(chem)
I mean 5g of sodium bisulfite mixed with 100g of solvent
Sunday, November 4, 2007 at 4:40pm by ~christina~

science(chem)
It was not stated, so I assume that I will be making them at std room temp. Thanks for the help, bobpursley.
Saturday, September 20, 2008 at 8:39am by ~christina~

Science organic chem
Yea, I'm talking about the experiment Nino said.
Tuesday, April 27, 2010 at 3:07pm by Dana

chem- science - grd 11
okay so i have to prepare a procedure for the following experiment, except i have no clue what to do question- the science department had 5 different solutions but accidently lost thier labels. devise a procedure to help you determine which liquid is what? *hint- you may use ...
Thursday, January 7, 2010 at 6:29pm by just wondering

science (chem)
darn..I like those plastic pipettes.. Well Thanks for the info Dr.Bob
Sunday, September 9, 2007 at 10:16pm by ~christina~

Science(chem)
You should state your thinking on the problems. We don't Do your homework for you but rather help you but you have to show what you did.
Wednesday, March 12, 2008 at 12:37am by ~christina~

science(chem)
Oh..yes I did perform an ATR. I didn't think it was that different from a normal IR but I guess it is from what your saying.
Friday, March 28, 2008 at 5:30pm by ~christina~

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

science(chem)
I need help finding information on how the conway microdiffusion is done/how it works. And why the sample is titrated. Thank you
Friday, September 12, 2008 at 11:05am by ~christina~

science(chem)
I need help finding information on how the conway microdiffusion is done/how it works. And why the sample is titrated. Thank you
Saturday, September 13, 2008 at 11:09pm by ~christina~

science(chem) Dr.Bob Question from before
Okay, I get it. No it wasn't to 5 decimal places. I'm not looking at my notebook but it was 1.0---. Thanks for your help
Saturday, October 4, 2008 at 12:40am by ~christina~

science: ap chem
is NaH2CO3 soluble and separate into Na+ and H2CO3- ions?
Monday, April 19, 2010 at 8:55pm by anonymous

SCIENCE/CHEM
You don't need me to do this. Balance it and add the coefficients. Or if you're having trouble, explain the problem.
Wednesday, May 12, 2010 at 9:11pm by DrBob222

science-chem- theory questions
you're so wonderful! you're right, i'll use the equations from now on. thank you for enlightening me!
Tuesday, March 22, 2011 at 5:51pm by sarah

Chem 101. Science
16 samble takent from rendm household in arey pland
Thursday, August 26, 2010 at 9:33pm by mubark

science; AP Chem
ooh ok, thank you very much! this site is seriously a life saver!
Saturday, September 15, 2012 at 10:32pm by Fiona

science (chem)
Sry for the double post before. Yep it was a triple bond. Thanks Dr.Bob =)
Friday, August 31, 2007 at 10:01pm by ~christina~

science(chem)
Hm..then why do they say polar or ionic? Are they being vague then in the description? Thanks Dr.Bob =)
Sunday, September 2, 2007 at 6:38pm by ~christina~

Science(chem [Solubility])
So I guess I'm not going to get it in g/ml then What's a "part of water" supposed to be? Thanks Dr.Bob =)
Monday, September 10, 2007 at 7:22pm by ~christina~

SCIENCE/CHEM
The volume to start with is 650 and you've increased pressure. It can't stay the same. P1V1 = P2V2
Wednesday, May 12, 2010 at 9:17pm by DrBob222

Science
no really were all just in the library helping each other get ready for a bug chem test
Thursday, October 28, 2010 at 7:58pm by Jacob

science; AP Chem
when i tried to figure it out, i got 451 kpa but i don't think that's right..
Saturday, September 15, 2012 at 10:32pm by Anonymous

science
http://www.udel.edu/chem/white/teaching/ConceptMap.html
Wednesday, September 26, 2012 at 1:34pm by Ms. Sue

science(chem)
I never knew that you could have a, "between areas," Ph.D Thanks for all the advice, Dr.Bob
Saturday, July 26, 2008 at 10:02pm by ~christina~

chemistry
lol, mcmaster first year chem quiz...i bet you anything that he/she is in life/health science...
Sunday, November 2, 2008 at 12:13pm by Anonymous

Science organic chem
You need to tell us specifically what experiment you are talking about and the equilibrium you have.
Tuesday, April 27, 2010 at 3:07pm by DrBob222

science(chem)
See if this will help you. http://www.science.smith.edu/departments/Biochem/Biochem_353/Buffer_Prep.html#top There is a better site but I can't find it now. Its done by Haverford College (UK).
Sunday, September 21, 2008 at 11:28pm by DrBob222

SCIENCE
http://www.chem.purdue.edu/gchelp/liquids/character.html
Wednesday, November 28, 2007 at 8:27pm by DrBob222

Science
http://www.chem.purdue.edu/gchelp/liquids/character.html
Tuesday, June 3, 2008 at 9:38pm by DrBob222

science
http://www.chem.purdue.edu/gchelp/liquids/character.html
Friday, June 10, 2011 at 12:14pm by TutorCat

Science/Chem
How many representative particles are in 2.5 mol H2O2? each mole consists of 6.02*10^23 things. Memorize that.
Sunday, February 4, 2007 at 7:22pm by Dennis

science(chem)
The first statement, what if no temperature is specified is another question. (not supposed to be refering to the bottom example which has temperatures given)
Thursday, April 10, 2008 at 12:00am by ~christina~

Science-Chem
Sucrose, C12H22O11, is burned to produce carbon dioxide and water. What is the balanced formula and reaction type?
Monday, March 8, 2010 at 3:20pm by Jacob

Science (Organic chem)
NO and NO2 are the nitrogen oxide gases being produced. Give the balance equation for both.
Monday, April 26, 2010 at 11:11pm by Dana

SCIENCE/CHEM
when the following equation is balanced , what is the sum of the co-efficients? AL2(SO4)^3+Ca(OH)2-->Al(OH)3+CaSO4
Wednesday, May 12, 2010 at 9:11pm by Andy

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