Search: chem-repost

Number of results: 16,642

CHEM organic chem
Responded above to a later repost.
Tuesday, November 13, 2007 at 6:18pm by DrBob222

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

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

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
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
WEll, both of us showed you, I am sorry it is marked wrong.
Sunday, October 24, 2010 at 5:57pm 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
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

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

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

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

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

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

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

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

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

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

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

Repost question
Is this the start to a story, essay, or are you just writing this for fun? What is it you want us to give our opinnion on? Please repost better directions. -Allyson
Wednesday, November 2, 2011 at 12:37pm by Allyson

Physics
Since so far no chemistry teacher has taken notice of this post, could you repost both questions, but make sure you put "Chemistry-repost" as the subject? Thank you.
Thursday, October 1, 2009 at 12:30pm by MathMate

repost-chem
Write a formula for the compound that forms from barium and the following polyatomic ion. (a) hydroxide (b) carbonate (c) phosphate (d) hydrogen phosphate basicaly all i know is that all of these are going to start with Na. I need major help! thanks:)
Wednesday, October 13, 2010 at 8:35pm by Hannah

Math-repost
Salman, Please make a point of indicating it is a repost if you post more than once. We don't want three teachers working on the same problem at the same time.
Sunday, November 22, 2009 at 9:22am by MathMate

Physics repost - need more explanation
Sara is right. If you ask the follow-up where it was asked, I will see it faster there than a repost/new post. I do appreciate that you have noted it as a repost and included the relevant information. In fact, the question has been responded an hour and a half ago before I see...
Wednesday, September 23, 2009 at 9:28pm by MathMate

Chem repost
or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?
Thursday, February 5, 2009 at 9:15pm by mary

english
Homework Help Forum: brain teaser help Current Questions | Post a New Question Answer this Question | Further Reading Posted by sam on Sunday, April 2, 2006 at 3:34pm. try to find the error. i couldn't its hard as !@#$%^& A B C D E F G H I J K L M N O P Q R S T U V W ...
Sunday, September 10, 2006 at 3:15am by chris

To Leslie--Chem 212
Please don't post questions piggy back on another. Go to the top of the page and post your own question. I am deleting this question and I will attempt to repost yours at the top of the page.
Tuesday, February 19, 2013 at 10:05pm by DrBob222

chem- repost
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 7:20pm by please, help me

Math
You may need to repost your question in clearer terms. Do you mean? (34*15)/5 * (364/52) = 102 * 7 = 10,404 If so, there is no need to round, since there are no fractions. I hope this helps. If not, repost your question. Thanks for asking.
Wednesday, June 17, 2009 at 8:40pm by PsyDAG

Science [repost]
What is the difference between an ionic bond and a covalent bond? I just keep forgetting which one is which...any easy way to remember these? PS> I know that you're not supposed to repost until 24 hours but I really need this answer! Thanks -MC
Thursday, February 5, 2009 at 7:05pm by mysterychicken

AP CHEM
This looks simple enough to answer; it looks as if you want us to write your paper/report/thesis for you. Just look up the properties of each and compare each. That should do it for you. If you have specific questions, explain what you don't understand and repost. Someone ...
Monday, July 18, 2011 at 1:48pm by DrBob222

Geometry repost
yes, except after taking all that time to type out a lengthy post, and then repost it, could you not have pulled out your calculator and found 20/36 = .555555 and then 21/37.8 = .555555 ???
Sunday, April 26, 2009 at 6:29pm by Reiny

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

algebra
Answered below. Please don't repost without checking your original post first for an answer. Also, tutors volunteer their time. You must have patience. If your question is not answered after 4 hours or so, then repost your question.
Friday, February 11, 2011 at 10:29pm by helper

chem repost
write a balanced equation for:Gaseous carbon dioxide and liquid water react to produce aqueous glucose (C6H12O6) and oxygen gas. I try but everytime i change the coefficient it makes the other elements unbalanced. the starting formula i got was: CO2(g) + H2O(l) -> ...
Sunday, November 21, 2010 at 5:02pm by hannah

Math(thanks)
Thanks. I posted this question 4 times titled math, math repost, math repost, and this one. You must be thinking of the other question about writing the standard form of the equation of the circle but oh well.
Wednesday, April 22, 2009 at 10:07pm by Jon

history
on the 1st page can someone please help me??????? Its the 2nd and 3rd black dot next to my nasme. Even if this is a repost, more information needs to be given before we can adequately respond. Please repost with more information. Thanks for asking.
Sunday, April 29, 2007 at 9:25pm by Mack

reading/writing
When you have written at least a rough draft of the sentences, please repost and someone here will be glad to help you. Please remember that we aren't here to do your work for you, but to help you once you've clearly made a good-faith attempt yourself. Please repost ...
Sunday, November 18, 2007 at 2:27pm by Writeacher

trigonometry (repost) Mathmate
I just took another look. The formula for the law of tangents should have been tan((A+B)/s)/tan((A-B)/2)=(a+b)/(a-b). Previously I have not divided the angles by 2, hence the error. I will try to make a corrected version and repost in the original post.
Saturday, February 26, 2011 at 3:37am by MathMate

ap chem repost
No, moles isn't the same thing as partial pressure. I obtained an answer of 0.0818 moles CH4 needed. Now use PV = nRT again. You know V, R, n, and T (but T is different at the new conditions); calculate P of CH4 and that will be the partial pressure of CH4. (By the way, ...
Sunday, April 12, 2009 at 5:24pm by DrBob222

Chemistry (repost)
Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution? 1)NaCN and NaOH 2) HCl and NaOH 3) HCN and NaOH 4)HCl and NaCN 5) NaCN and HCN is the answer 1 and 5?? chem - DrBob222, Sunday, April 10, 2011 at 1:28am...
Sunday, April 10, 2011 at 4:16pm by Rachel

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
For germanium atom write: the set of four quantum numbers for the two highest energy electrons in an atom of Ge. If you go to www.webelements.com and click on Ge, then click on the electron configuration (on the left side of the site but you may need to scroll to find it). ...
Sunday, October 29, 2006 at 9:28pm by Ali

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

Algebra
What kind of distributions are you talking about? Please repost with more specific data. Typically distributions organize scores into groupings. These distributions can be represented by such things as curves, bar diagrams or frequency polygons. I hope this helps. If not ...
Friday, September 14, 2007 at 9:35pm by PsyDAG

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
but. i can tell its wrong because of what i stated: "i tried the answer in my online hw and it said it was wrong. i am looking in my text book and CnH2n-2. the answer you guys are saying is the formula for alkynes. but i need to find the formula for dialkene. the formula ...
Sunday, October 24, 2010 at 5:57pm by rebekah

chem
what is a liquid solution and a gaseous solution? Do you intend to ask us to name a liquid solution and a gaseous solution. One example of a liquid solution is vinegar. It is acetic acid in water. That is a solution of two liquids. An example of a gaseous solution is air. ...
Monday, May 14, 2007 at 10:25pm by revie

Chem--PLEASE HELP 911
Here is a site that shows you how to balance redox equations. Repost with specific questions. I can help you through it but you must learn how to do this. http://www.chemteam.info/Redox/Redox.html
Thursday, April 25, 2013 at 12:22pm by DrBob222

chemistry repost
In addition you don't give enough information about the 1.86 and 0.52 to help. Apparently some tutor gave you the procedure for solving the problem and you didn't understand. However, you have posted just piece-meal info and that isn't enough to help. I suggest you...
Saturday, November 5, 2011 at 10:51am by DrBob222

science
Can you direct me to a site(s) which can help with college chemistry and statistics? Here are a couple of good chemistry sites that pretty well cover the waterfront. I don't know any stat sites but if you will repost with the subject line of "math" I'm sure ...
Monday, February 19, 2007 at 2:39pm by jules

algerba!2!
(-2x2y)3 * (5xy3)2 *I don't get this on at all!!! Are there any exponents in this one? If so, repost showing the caret to indicate the exponent. oh sorry I forget to do that.LOL!Here it is now: (-2x^2y)^3 * (5xy^3)^2 Are there any exponents in this one? If so, repost ...
Wednesday, November 8, 2006 at 5:49pm by Sandro!

repost chem
or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7? D COUNT is electrons in the d orbital, and i think total is 20? 2 ...
Thursday, February 5, 2009 at 11:02pm by mary

To Lynn,Alex,Physics_student,Natasha
Please refrain from reposting the same question within a short time (less than a day). If you do repost, add "repost" at the end of the subject. Quadruple posting within an hour and a half means that teachers have to spend time reading the extra posts, which actually...
Tuesday, October 6, 2009 at 4:24pm by MathMate

chem repost
http://www.jiskha.com/display.cgi?id=1290369808
Sunday, November 21, 2010 at 5:02pm by DrBob222

physics help!!!
wow, my apology. im sorry. i was expecting to get explainations and get the right equations. im very interesting in physics and i found this great website. you all are very helpful! so i thought i could get as much help as i could. AND you said that i can repost some questions...
Tuesday, November 17, 2009 at 10:00pm by greg

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
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

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 repost
a 2L container is charged with 2atm of O2 at 298 Kelvin. Ch4(g) + 2O2(g) --> CO2(g) + 2H20(g) calculate the partial pressure of methane needed to react completely with the O2 in the vessel. What is the total pressure after the reaction is complete if the temperature ...
Sunday, April 12, 2009 at 7:47pm by sarah

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

repost bio
What is the effect of substrate concentration on enzyme activity? How does enzyme activity change as substrate concentration decreases? Explain on a molecular basis. I am not sure what the question wants from me. Would this be right, and is there anything missing from my ...
Wednesday, February 27, 2008 at 10:10pm by Huckabee: repost

chem/project
You might ask if his instruments will measure reflectance. The reflectance meters with which I am familiar are designed to measure the brightness of whites; e.g. paper, gloss, etc. I don't know if they would differentiate between stains that were not white AND were ...
Friday, January 11, 2008 at 10:33pm by DrBob222

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

physics
See: http://www.jiskha.com/display.cgi?id=1254451407 Note: if you repost the same question, it would be nice if you put "-repost" at the end of the subject. Thank you for your understanding.
Thursday, October 1, 2009 at 10:28pm by MathMate

ap chem repost
a 2L container is charged with 2atm of O2 at 298 Kelvin. Ch4(g) + 2O2(g) --> CO2(g) + 2H20(g) calculate the partial pressure of methane needed to react completely with the O2 in the vessel. What is the total pressure after the reaction is complete if the temperature ...
Sunday, April 12, 2009 at 5:24pm by sarah

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

English (Essay)
These paragraphs aren't ready for proofreading yet. Please read it aloud to someone -- or better yet, have someone read it aloud to you. You should hear several errors. Fix them and repost. Most of the problems are word choice problems; for example, the words "to ...
Wednesday, August 24, 2011 at 7:22pm by Writeacher

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 (repost)
Hydrogen and carbon dioxide react at a high temperature to give water and carbon monoxide. H2(g) + CO2(g) --> H2O(g) + CO(g) (b) Suppose 0.052 mol each of H2 and CO2 are placed in a 1.5 L container. When equilibrium is achieved at 986°C, what amounts of CO(g) and ...
Sunday, April 17, 2011 at 1:51pm by Rachel

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