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April 18, 2014

Search: chem hwk help!

Number of results: 14,266

chem hwk
a simple hwk question.. i don't understand what i need to do.. 1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns completely, how many grams ...
Thursday, January 24, 2013 at 7:00pm by wll.i.am

Chem hwk
the final answer is 7750.80/333.012= 23.27g CaSOa if you follow DrBob222 steps
Monday, January 28, 2013 at 2:58pm by me

Chem hwk
neither of these answers worked in my homework submission. Even though I already submitted can you see where either answer may be incorrect?
Monday, April 29, 2013 at 12:12pm by Tif

Chem hwk
Using the equation N2 + 3H2 yields ==> 2NH3 , determine how many grams of ammonia will be produced when 233 grams of hydrogen is consume
Friday, January 25, 2013 at 9:23am by thad

chem hwk help!
Given the following reaction: 3 CaCl2 + 2 H3PO4 Ca3(PO4)2 + 6 HCl How many grams of H3PO4 are needed to react completely with 1.837 g of CaCl2? I don't understand at all
Friday, January 25, 2013 at 3:06pm by Annie

Physics
http://einstein.drexel.edu/~wking/courses/phys101_w07/hwk/hwk4.pdf
Thursday, October 3, 2013 at 12:39pm by Elena

Chem hwk
In the balanced double replacement reaction of calcium chloride CaCl2 and aluminum sulfate Al2(SO4)3, how many grams of calcium sulfate can be produced if you start the reaction with 18.97 grams of calcium chloride and the reaction goes to completion?
Monday, January 28, 2013 at 2:58pm by Thad

Chem hwk
Yes, if you posted your work I could check it but you didn't post your work. See my response to your other post above. Note that I did NOT say the answer was 126 for #1 and 0.9 for #2. 126 or so means the answer is approximately that number. You are to do the work and ...
Monday, April 29, 2013 at 12:12pm by DrBob222

Chemistry- HWK CHECK
5 is c
Monday, August 4, 2008 at 9:10pm by Anonymous

Chemistry- HWK CHECK
5 is B
Monday, August 4, 2008 at 9:10pm by Anonymous

Chemistry- HWK CHECK
LIES!!!!!!!!!!!!
Monday, August 4, 2008 at 9:10pm by me

Chemistry- HWK CHECK
5 is A
Monday, August 4, 2008 at 9:10pm by CHRIS

Chemistry- HWK CHECK
no 5 is c!
Monday, August 4, 2008 at 9:10pm by sammy

Chemistry- HWK CHECK
5 is positive
Monday, August 4, 2008 at 9:10pm by a

BIBLE HWK
Why should He?
Wednesday, April 22, 2009 at 8:55pm by Ms. Sue

BIBLE HWK
Are there any specific answers?
Wednesday, April 22, 2009 at 8:55pm by Rae

Chemistry- HWK CHECK
NO!!! ARE YOU RETARDED? ITS B!!!
Monday, August 4, 2008 at 9:10pm by hrselover4824

Chemistry- HWK CHECK
i am not an iddiot
Monday, August 4, 2008 at 9:10pm by Anonymous

chemistry HWK MAKES NO SENSE
It could be and is.
Monday, January 7, 2013 at 12:56pm by DrBob222

chemistry HWK MAKES NO SENSE
Thank you!
Monday, January 7, 2013 at 12:56pm by simon

chemistry HWK MAKES NO SENSE
Your welcome!
Monday, January 7, 2013 at 12:56pm by T.J And the Vibe

chem
a simple hwk question.. i don't understand what i need to do.. 1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns completely, how many grams ...
Thursday, January 24, 2013 at 8:23pm by wll.i.am

Chem hwk
3CaCl2 + Al2(SO4)3 ==> 3CaSO4 + 2AlCl3 mols CaCl2 = grams/molar mass Convert mols CaCl2 to mols CaSO4 using the coefficients in the balanced equation. Convert mols CaSO4 to g. g = mols x molar mass.
Monday, January 28, 2013 at 2:58pm by DrBob222

Chemistry- HWK CHECK
all correct.
Monday, August 4, 2008 at 9:10pm by bobpursley

Chemistry- HWK CHECK
The answer is B. 100%
Monday, August 4, 2008 at 9:10pm by lol

chem hwk help!
cmon, we just did one of these. convert grams to moles, then use the reaction to figure the relative amounts needed/produced. moles of input = 1.837/111 = .01655 moles CaCl2 Each 3 CaCl2 requires 2 H3PO4 so, 2/3 * .01655 = .011 moles H3PO4 .011 moles H3PO4 = .011 * 98 = 1.081g
Friday, January 25, 2013 at 3:06pm by Steve

Chemistry- HWK CHECK
yea, #5 is fosho B
Monday, August 4, 2008 at 9:10pm by UCI student

Chemistry- HWK CHECK
thanks a lot. i got #5 wrong. it's not B
Monday, August 4, 2008 at 9:10pm by Anonymous

Chemistry- HWK CHECK
I put C for #5 and got it wrong it is not C
Monday, August 4, 2008 at 9:10pm by Girl

Chemistry- HWK CHECK
not so helpful peers lol
Monday, August 4, 2008 at 9:10pm by CHeem

Chem hwk
Your friend is right. mols needed = M x L = 13317*0.504 = ? Then mol = grams/molar mass so ?mols x molar mass Ci(NO3)2 = ? and I get something like 126 grams or so. Convert g Cu(NO3)2 to mols. mols = grams/molar mass Then M = mols/L soln. The answer is about 0.9 M.
Monday, April 29, 2013 at 12:12pm by DrBob222

Chemistry- HWK CHECK
#4 i put negative but i got it wrong
Monday, August 4, 2008 at 9:10pm by UCIANTEATER

acids and alkalis
hi thanks alot it realy helped me wiv my hwk :D
Saturday, November 4, 2006 at 5:56am by laura

Chemistry- HWK CHECK
wow... there are so many idiots on this sites because the answer is D!!!
Monday, August 4, 2008 at 9:10pm by JUSTBEINGME

Chemistry- HWK CHECK
wow... there are so many idiots on this sites because the answer is D!!!
Monday, August 4, 2008 at 9:10pm by JUSTBEINGME

Chemistry- HWK CHECK
wow... there are so many idiots on this sites because the answer is D!!!
Monday, August 4, 2008 at 9:10pm by JUSTBEINGME

Chemistry- HWK CHECK
wow... there are so many idiots on this sites because the answer is D!!!
Monday, August 4, 2008 at 9:10pm by JUSTBEINGME

Chemistry- HWK CHECK
5 is def. not c..i got it wrong
Monday, August 4, 2008 at 9:10pm by el cucuy

Geography
I have this for hwk as well. Need answers 1, 11, 12 and 14.
Tuesday, January 2, 2007 at 5:41am by Unknown

Geography
I have this for hwk as well. Need answers 1, 11, 12 and 14.
Tuesday, January 2, 2007 at 5:41am by Unknown

real estate
um stop cheating do ur own hwk,
Tuesday, October 7, 2008 at 2:41pm by Anonymous

the big idea of energy
I seriously dnt get it ...iron and sulphur hwk!!! Helpp!!!
Tuesday, December 5, 2006 at 2:18pm by Strawbeeryyy!!

BIBLE HWK
Why didn't God destroy Satan and his evil angels after Christ's death?
Wednesday, April 22, 2009 at 8:55pm by Rae

Chem hwk
How many grams of solute are required to make a 504 mL solution of copper (I) nitrate with a concentration of 1.3317 M? I go 238.6 g but my friend said I'm way off When 84.2730 grams of solute are used to make a 504 mL solution of copper (I) nitrate, what is the concentration...
Monday, April 29, 2013 at 12:12pm by Tif

Chemistry
I tried to answer the hwk using this tip for part B, but I didn't get it right...is there another way to set it up?
Monday, May 11, 2009 at 8:57am by Jeena

Chemistry- HWK CHECK
okay forget what everyone else is saying. i just submitted my answer and B IS RIGHT. TRUST ME :)
Monday, August 4, 2008 at 9:10pm by THE TRUTH!!!!

chemistry HWK MAKES NO SENSE
balance: H3PO4 + Mg(OH)2 → Mg3(PO4)2 + H2O
Monday, January 7, 2013 at 12:56pm by simon

chemistry HWK MAKES NO SENSE
This could be the answer, 2 H3PO4 + 3 Mg(OH)2 --> Mg3(PO4)2 + 6 H20
Monday, January 7, 2013 at 12:56pm by T.J And the Vibe

Chemistry- HWK CHECK
all of you who says B are just trying to screw everyone else's hw score over -__-
Monday, August 4, 2008 at 9:10pm by Diem

Chemistry- HWK CHECK
5 is positive! for me, positive was a. that's probably why some people got it wrong (:
Monday, August 4, 2008 at 9:10pm by Anonymous

Editing
On this hwk help forum, do you edit people's work? I have a paragraph and I need someone to look it over and make some corrections. Would anyone be willing to do that?
Thursday, October 4, 2007 at 7:14pm by Gina

Chemistry- HWK CHECK
the answer to #4 should be POSITIVE & MORE ... the more moles produced, the greater the entropy, thus higher delta S
Monday, August 4, 2008 at 9:10pm by Anonymous

Geography
I gat this HWK 1-granite 2-trench 3-? 4-? 5-Magma 6-Richter 7-Earthquake 8-Lithosphere 9-? 10-Core 11-Ring Of Fire 12-Tsunami 13-Chronograph 14-?
Tuesday, January 2, 2007 at 5:41am by jams

Chemistry- HWK CHECK
#5: is Positive. It's not A, B, or C. Your question may be worded differently. But the correct answer should be "positive" for change in enthalpy. I did the lab, and my calculation supports it!
Monday, August 4, 2008 at 9:10pm by Foxyfresh

Chemistry- HWK CHECK
No u guys 5 really is B.. I wish i read these coments before putting C.. I regret it cuz C was seriouslyy wrong.. its positive. =D y would i try to screw everyone??? thats just mean.
Monday, August 4, 2008 at 9:10pm by lillian

CHEMISTRY HWK MAKES NO SENSE
How many grams of C are required to make 464.99 grams of this compound? compound= C3H8
Thursday, November 29, 2012 at 7:02pm by HELP

Plastic Moulds ==> Couldn't find anything myself
note: I need to find a mold that can be used at home..not industrial scale b/c presumably I'm a "poor college student" according to the HWK Q that asks us to create this pipe in the first place.
Monday, February 25, 2008 at 11:41pm by ~christina~

the big idea of energy
i got journey of a cheese sandwich hwk and to get lvl 7 (i'm in yr 8) i have to explain how cells use food using the big idea of energy. pls help! why is it not on wikipedia?
Tuesday, December 5, 2006 at 2:18pm by PieLighter

Chemistry- HWK CHECK
5 is B. I really find it mean that people deliberately put the wrong answers on this site. Is the pursuit of a decimal's worth of increased standing in the class distribution really worth lessening your character? Why can't we just help each other out fairly?
Monday, August 4, 2008 at 9:10pm by Stephanie

complaint
Sorry but I'd have to say that people are sometimes busy (you know this) and are all volunteers here (on this page anyhow I think) and thus if there isn't someone who can answer your question it will be left to someone else to do if we don't know it. And some advice is that ...
Saturday, March 8, 2008 at 10:27pm by ~christina~

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

Chemistry- HWK CHECK
(4 pts) The concentration and volume of reagents combined in each trial are listed in the table below: Trial 00020 M 00020 M H2O(mL) Fe(NO3)3 (mL) KSCN (mL) 1 5 2 3 2 5 3 2 3 5 4 1 4 5 5 0 Initially (right after combining and before any reaction occurs) the concentration of ...
Monday, August 4, 2008 at 9:10pm by Anonymous

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

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

gen chem
i tried that, apparently its not the right answer either =/.
Saturday, May 8, 2010 at 7:46pm by Chem

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

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

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
maybe try using P1V1/n1T1 = P2V2/n2T2 ... im in chem too...
Saturday, February 27, 2010 at 1:16am by fellow student

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

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

chem help
sorry the 2nd question is the right one
Saturday, February 28, 2009 at 11:56pm 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

organic chem
cadaverine is AKA pentane-1,5-diamine
Tuesday, April 26, 2011 at 5:18am by chem

organic chem
cadaverine is AKA pentane-1,5-diamine
Tuesday, April 26, 2011 at 5:18am by chem

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

chem
sorry read it wrong, doing this now in chem
Tuesday, March 19, 2013 at 6:02pm by Amanda

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

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
Sarah, 4.70 is what you get when you do the -log (Ka)
Monday, April 4, 2011 at 1:24am by chem

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!!

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

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

gen chem
what is "n" and thank you so much for all the help!
Saturday, May 8, 2010 at 7:46pm by Chem

gen chem
yes, it wants an actual value
Sunday, May 9, 2010 at 3:17pm by Chem

gen chem
that works! thank you so much!!
Sunday, May 9, 2010 at 3:42pm by Chem

CHEMISTRY HWK MAKES NO SENSE
I thought it made goo sense. How many moles C3H8 do you have in 464.99 g? That is 464.99/molar mass C3H8 = ?mols C3H8 How many mols C are in ?mols C3H8. Mols C = 3*mols C3H8 because there are 3 atoms of C in 1 molecule C3H8. Now convert mols C to grams C. g = mols C x atomic ...
Thursday, November 29, 2012 at 7:02pm by DrBob222

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

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

gen chem
2NO <-> N2 O2 initial .116 0 0 change -x +x +x equil .116-x x x
Sunday, May 9, 2010 at 3:42pm by Chem

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 help
Ammonia,is a weak base with a Ka value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?
Saturday, February 28, 2009 at 11:56pm by chem

chem help
Ammonia,is a weak base with a Kb value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?
Saturday, February 28, 2009 at 11:56pm by chem

gen chem
yes I did, but im still not getting the right answer. I got .1136 which is not the correct answer.
Sunday, May 9, 2010 at 3:42pm by Chem

Chem
4.30 grams of NH4Cl is added to 14.5 grams of water. Calculate the molality of the solution
Monday, January 20, 2014 at 6:48pm by CHEM

chem: study of kinetics
he gave us an example of what the slope might be in class and it was -1.3x10^2 but my slop is completely different, was i supposed to do calculations? or just get the one from excel? what do i put in the 2 blanks?
Saturday, October 16, 2010 at 2:20pm by chem

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