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April 16, 2014

Search: Chemistry (Check)

Number of results: 135,824

Accounting
A check returned by a bank because the issuer's cash account balance could not cover the check is called a(n): a. Cancelled check b. Certified check c. Outstanding check d. NSF check
Thursday, October 18, 2012 at 7:14pm by Anton

Chemistry
As written, the coefficients are as follows: 1, 12, 1, 1, 10, 6 I haven't check it. You check it.
Thursday, January 24, 2008 at 1:31pm by DrBob222

Chemistry(Please Check)
4,5,6 look ok. 1,2,and 3 I can't confirm. Show your work on those. I didn't check 7.
Monday, April 23, 2012 at 11:56am by DrBob222

chemistry
I didnt' check the math on the molmass, so double check that , but you have it down right procedure.
Monday, October 27, 2008 at 4:20pm by bobpursley

Chemistry
check my thinking. Check my work.
Monday, February 4, 2008 at 7:07pm by DrBob222

Math 157
Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a ...
Wednesday, December 8, 2010 at 9:51pm by Rena

Math
Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a ...
Wednesday, December 8, 2010 at 8:37pm by Rena

Math
At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...
Friday, November 6, 2009 at 9:00pm by Anna

Math
At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...
Friday, November 6, 2009 at 9:21pm by Anna

Math
At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...
Friday, November 6, 2009 at 9:25pm by Anna

Chemistry. Please check my answer!
Your method is correct. I did not check the arithmetic but my physics book says lead is .130 so I think you did it right.
Tuesday, December 2, 2008 at 8:34pm by Damon

chemistry
massingrams=4.8E-2*molmassZnCl2 you need to check it, but I think one zinc + 2 Cl atoms=136grams. Check that, and do it more accurately.
Friday, January 21, 2011 at 8:27pm by bobpursley

Math
At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what ...
Wednesday, December 8, 2010 at 8:43am by Rena

Math
At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what ...
Wednesday, December 8, 2010 at 3:07pm by Rena

math
At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...
Saturday, January 9, 2010 at 1:48am by crystal

CHemistry....Please double check DrBobb
SO the number is suppose to be that high, i guess i will have to check my significant digits and just go over it once more to see what i get. Thanks
Saturday, January 24, 2009 at 1:06pm by Saira

Chemistry
I thought I did this for you last night. Do you just want to check your answer? Post the answer or your work; I'll be happy to check it for you.
Friday, February 17, 2012 at 12:20pm by DrBob222

Chemistry- please check my work
We would much prefer you to show your work and let us check your answer. We can help better that way.
Wednesday, February 25, 2009 at 9:54pm by DrBob222

Chemistry
Check a. Check c.
Thursday, November 5, 2009 at 10:12pm by DrBob222

chemistry
I believe you should check the numbers in your problem, particularly the number for grams H2O. I don't think it can be that much. Check the other numbers while you are at it.
Sunday, December 9, 2007 at 2:26pm by DrBob222

chemistry
ok. You have x*x/(0.1-x)(0.1-x) = 1.60. That is X^2/(0.1-X)^2 =1.60 Take the square root of both sides. X/(0.1-X) = sqrt 1.60 X/0.1-X)=1.265 X = 1.265(0.1-X) X = 0.1265 - 1.265X. Rearrange to X+1.265X = 0.1265 X = 0.1265/2.265 = 0.0558 which rounds to 0.056 M for CO and H2O. 0...
Monday, March 31, 2008 at 11:04pm by DrBob222

Algebra
Hello, can someone help me solve and check the following 1) x - 8 = 20 Check: 2) x + 15 = 35 Check: 3) -x +6 = 3 Check: The symbol 'x' is in italic. If I can understand the symbols better, I belive I can get the hang of the course.
Friday, January 8, 2010 at 7:32pm by Tamir

chemistry
My dear.....check the signs (-) on the values and then check the question once again......mu answers are 100% correct...and i have scored 100% n this exam also.....:P
Friday, May 31, 2013 at 1:47am by ssss

Chemistry - Periodic Table+Cations(check+help)
hindi;english;maths chemistry;physics
Wednesday, February 2, 2011 at 5:22am by shubham

chemistry
check out w w w mychemistrytutor c o m
Saturday, October 6, 2007 at 4:25pm by Chemistry Tutor

chemistry(Please Check)
Wouldn't that depend upon how much H2 is in the tank. I have seen this problem several times in the last 2-3 days. This is only a piece of it. Post the entire problem before I can check this part of it.
Monday, April 23, 2012 at 2:19pm by DrBob222

chemistry stoichiometry
It would be far simpler for you to show your calculations and let us check them than for us to work the problems, take the time to post, and let you check our work.
Sunday, September 9, 2007 at 9:34pm by DrBob222

college chemistry
convert 10.5g N2 to moles. moles= 10.5/28 as I remember, check it. V= nRT/P check your R units, to make certain it is in atm
Sunday, December 11, 2011 at 7:18pm by bobpursley

chemistry
I have an idea you want to check your answer. Rather than me do all of that typing to answer four LONG questions, tell me what you don't understand or if you want me to check you answers show your answers and I'll do that.
Wednesday, February 8, 2012 at 11:20pm by DrBob222

Chemistry
Lets see. You want to dilute it 20x, so add nineteen parts water to one part sodium hydroxide. Isn't that 190ml water, 10 ml of NaOH? Check that. You can check it by calculating the molarity of the resulting solution.
Thursday, October 25, 2007 at 11:26am by bobpursley

Physics
1. Check calculations and have another person check it also. 2. Check Power supply voltage. 3. Remove all resistors from circuit and check them individually. 4. Make sure circuit is wired correctly.
Thursday, September 19, 2013 at 11:08am by Henry

chemistry check my work
theoretical yield= 1.50/molmassC7H6O3 * molmassC8H8OH =1.50/138.12 * 152.14=1.65g percent yield= 1.31/1.65=.792 check my calcs.
Thursday, April 15, 2010 at 8:14am by bobpursley

Chemistry
Calculate the molar solubility of barium thiosulfate in 0.0045 M Na2S2O3(aq). (Hint: Check any simplifying assumptions that you make.)
Monday, April 19, 2010 at 3:07pm by Chemistry Confused

English
1. Can you give me a rain check? 2. Can I take a rain check? 3. Can I have a frain check? 4. Can I get a rain check? (Are they all grammatical and the same? Which expression is commonly used?)
Tuesday, November 20, 2012 at 10:01am by rfvv

Chemistry conversions check
I'm sooooooo not sure if I'm doing this right, but can someone check it please? Thanks :)) 5) Determine the mass in grams of 3.01 x 10^23 atoms of Cl (element) I got 17.5 grams...is this right?
Thursday, September 10, 2009 at 10:35pm by Emily

Chemistry
Check that post. 2NO + O2 ==> 2NO isn't balanced. I didn't check the rest of the post.
Monday, November 5, 2012 at 11:50am by DrBob222

chemistry
If you care to post your work I will be glad t check it. Don't take shortcuts in doing it. When checking problems against an on-line database the problem (and it happens quite often) is you key in too many (or not enough) significant figures. Check that first before typing in ...
Sunday, October 27, 2013 at 9:38pm by DrBob222

chemistry
The question can be answered but technically it is incorrect. The conversion factors you need are as follows: 1.40 euro/L x ($1.59/euro) x (3.78 L/gallon) = ?? Check my thinking. Check that the units you don't want cancel and that the units you want to keep are in the answer.
Thursday, September 11, 2008 at 9:31pm by DrBob222

chemistry
I suppose I answered only half the question. I solved for x to obtain 500 g NaCl but you need to confirm that. Then 5,000 g H2O - 500 g NaCl = 4.5 kg. Check it to make sure that's a 1-% solution. (500 g NaCl/4500 gH2O+500 gNaCl)*100 = ??% (500/5,000)*100 = (50000/5000) = 10% ...
Saturday, January 15, 2011 at 5:14am by DrBob222

Chemistry(Please check)
1) The Ka for acetic acid is 1.8e-5. What is the pH of a 3.18M solution of this acid? I did 1.8e-5 = x^2/3.18 x=sqrt 1.8e-5 X 3.18 = 7.56e-3 pH=-log(7.56e-3) = 2.12 The pH is 2.12 2) At 25 degrees celsius, the pH of a 1.75M NaCN solution (the Ka for HCN is 4.0e-10) is ? 4.0e-...
Monday, April 2, 2012 at 3:47pm by Hannah

chemistry
This a redox equation but the loss and gain of electrons is balanced. All we need to do is check the H and O. There are 7 O atoms on the left. We have 3 in Cr2O3, we need 4 more so place a 4 as a coefficient for H2O. That should balance it. Check it atom by atom.
Thursday, May 6, 2010 at 3:11pm by DrBob222

Chemistry
Assume 116.07grams (I didn't check that) carbon percent= 4*12/116= check O percent= 4*16/116= it checks. Notice how I checked it by working from the formula you proposed back to the original percents.
Sunday, January 25, 2009 at 6:43pm by bobpursley

Chemistry check and help
what is ... Sodium bisulphate hydroiodic acid ammonium dihydrogen phosphate Zn(HCrO4)2 Calcium metal ferrous bromide sodium carbide phosphate radical Check... sodium bicarbonate NaHCO3
Tuesday, March 11, 2014 at 4:45pm by Sam

chemistry steps check
Well, I did NOT make an error in my calculations. But I goofed big time. Notice that the NaOH is the excess, not HCl. (There is more NaOH to begin than there is HCl.) Therefore, the 0.00031 is the mol NaOH left unreacted. That means the 1.79 you calculated is the pOH. Just ...
Friday, May 2, 2008 at 11:45pm by DrBob222

chemistry(Please Check)
You dissolve 6.55 g of potassium nitrate in enough water to make a 250. mL solution. What is the molarity of this solution ?Answer: 0.0262 Please Check my answer
Monday, April 23, 2012 at 2:26pm by Wurola

pre alg
(25a^-2 b^-5 c^8) / (40 a^5 c^9) 25/40 = 5/8 check a^-2/a^5 = a^-7 check b^-5 = b^-5 check c^8/c^9 = c^-1 check
Sunday, March 1, 2009 at 4:35pm by Damon

Algebra
So when we check the problem, would this be acceptable? Does all of this check out? Thanks! (x-2)/(x-1) + (2)/(x^2-1) = 0 x-2 / x-1+2/(x-1)(x-2) = 0 To check: 0-2 = -2 0-1 = -1 -1/-2 = 0.5 02 1 = -1 -1/2 = -0.5 0.5 + -0.5 = 0 1-2 = -1 1-1 = 0 0/-1 = 0 12 1 = 0 0/2 = 0 0+0...
Tuesday, August 4, 2009 at 8:58am by Rachale

Chemistry
Check this out. Check my thinking. P1/T1 = P2/T2 OR P/T = k so the slope of 0.004 must be k. We can rearrange the ideal gas law to PV = nRT, rearrange to PV/T = nR; therefore, PV/T = k = nR (since V = 1 liter) Therefore, 0.004 = nR. You know R, calculate n = number of mols. ...
Thursday, July 3, 2008 at 3:16am by DrBob222

8th Grade Algebra: Answer Check
1,2,3,4,5,6,7 are ok. 8. sqrt (3x^2) = x*sqrt(3) Check that. 9,10,11 ok. 12. sqrt(3)*sqrt(27) = sqrt 3*sqrt(3*9) 9*sqrt(9) = 9*3= 27. Check that. check 15. I think you just wrote it wrong. I get 1/5*sqrt(10). Check that. The others look ok.
Tuesday, January 20, 2009 at 10:42pm by DrBob222

Science
i'll check in my notes AGAIN 2 check to see if i can find the answer the you can check it for me
Monday, November 7, 2011 at 8:40pm by Laruen

Chemistry
I get the same answer and the coefficients are the same as yours for one root but 3.69 cant be correct because you had only 0.724 initially. For the other root I calculated 0.528 but I didn't check my figures. That should be the answer to the problem. Check me out on that.
Sunday, May 10, 2009 at 11:24pm by DrBob222

Chemistry--correction
I made a typo, next to last line, should be molar mass K2C2O4 = g K2C2O4 instead of what follows. molar mass K2C2O4 = g K2C3O4. Check my thinking. Check my work.
Wednesday, March 10, 2010 at 10:26pm by DrBob222

Chemistry
George, how much of this do you know how to do? This is a lot of work for me just to check your answers and I don't want to work these if you already know how. If you have worked these, post your work and I'll be happy to check your answers. I can do that much faster than I ...
Sunday, April 3, 2011 at 5:13pm by DrBob222

Chemistry-Question 3
pph = parts per hundred = %. 1.91 pph = 1.91% 4.86 kg = 4860 g sample; of which there is 1.91% CHCl3. Therefore, the amount of CHCl3 is 4,860 g x 0.0191 = ?? Check my thinking. Check my work.
Tuesday, September 2, 2008 at 3:04pm by DrBob222

CHemistry....Please double check DrBobb
holy, we CHMA11 kids are all over the internet. trying to find how to work out the pre-labs and mastering chemistry homework.
Saturday, January 24, 2009 at 1:06pm by ur class fella

algebra
If you write a check without enough money in the bank a certain store will charge you a penalty if the check is returned to them from the bank. The penalty is 15% of the amount of the check plus a $25 processing fee. Let the "n" amount of the check and the
Saturday, August 21, 2010 at 9:08pm by Anonymous

Chemistry
No, I don't get those answers. Something more like 55 g Au (that's just a close number) and something like 43% Au in the ore.Check those numbers. If you want to post your work I'll be glad to check it for you.
Tuesday, February 9, 2010 at 6:42pm by DrBob222

Algebra HELP :(
If you write a check without enough money in the bank, a certain store will charge you a penalty if the check is returned to them from the bank. The penalty is 5% of the amount of the check plus a $10 processing fee. Let n= the amount of the check and p the amount of the ...
Friday, June 4, 2010 at 12:44am by bart

CHemistry
Dipole attractions, London Forces and Hydrogen Bonding. For details on how they arise and how they compare, consult any chemistry textbook. Check under "intermolecular forces" or the individual names I gave you.
Monday, May 18, 2009 at 3:19pm by GK

chemistry
DR BOB Can you check my answer at Monday may 10 2010 at 7:12 pm at Chemistry -andy(Page 2) I think I may have got it !!! Thanks andy
Monday, May 10, 2010 at 7:16pm by Andy

Chemistry check
no
Tuesday, February 13, 2007 at 10:35am by nicv

Chemistry check
Thank you
Wednesday, March 11, 2009 at 5:16pm by Mike

chemistry
You have a solution that is 28.1 g solute/100 g solution. You want 646 g of the solute. Wouldn't that just be 646 x (100/28/1) = ?? OR by ratio/proportion (28.1/100) = (646/x) x = 646 x 100/28.1 = ?? You can check it to make sure it is ok. If I do the math I get close to 2299 ...
Sunday, February 14, 2010 at 9:28pm by DrBob222

College Chemistry
Ka=[H][COOH]/([HCOOH] ka= x^2/(.5-x) solve this for x x^2+.00018x-.5*.00018=0 x=(-.00018+-sqrt(.00018^2+.00036))/2 x=-.00009+- .00948= .00939 check all that math. pH=-log (.00939)=2.03 check the math.
Thursday, November 4, 2010 at 10:32am by bobpursley

chemistry
This is a lot of work and you need to know how to do this type problem. So tell us what you understand, how much you can do, and what you don't understand and we can help you through it. I'm not interested in spending the next hour typing the answers just so you can check your...
Monday, February 18, 2008 at 8:51am by DrBob222

chemistry
I think that the base always contains hydroxide, aka OH; the original components were water mixed with an ammonium compound ( NH2)Check the chemistry reference tables too, which have tables that identify the bases and acids.
Saturday, May 12, 2012 at 8:13pm by Nancy

Chemistry
I think this compounds undergoes hydrolysis when dissolved in water and it produces 1 mol H^+ (HCl specifically) from 1 mol of the compound. 0.004 mol will produce 0.004 mol HCl and M = mols/L = 0.004/0.150 L = ?? pH = - log(H^+). Check my thinking. Check my work.
Monday, November 12, 2007 at 11:14pm by DrBob222

Chemistry
I will do the problem and let you check it. I'm glad you included the 1:1 ratio for I had forgotten what it was. I assume you meant the formula to be C6H8O6 mols ascorbic acid = grams/molar mass = 0.1000/176.13 = ?? Since it is a 1:1 titration, then mols I2 = the same number ...
Saturday, April 26, 2008 at 9:28pm by DrBob222

Algebra
You can check your solutions by putting in the values of s s=? -1 then -1+7/(-1)=-1-7=-8 checks s=? 7 then 7+7/7=7+1=8 doesnt check. Did you mean minus 7, I think that checks. Check my thinking.
Wednesday, January 23, 2008 at 2:14pm by bobpursley

Science
Check for air pollution from the factories. Check for water pollution in the rivers. Check for hazardous waste polluting the soil.
Saturday, September 18, 2010 at 10:54am by Ms. Sue

Chemistry please check
Thanks!
Monday, February 25, 2008 at 8:50pm by Mary

chemistry
we can check your work.
Wednesday, April 9, 2008 at 2:07am by bobpursley

Chemistry check
yes thats right
Wednesday, March 11, 2009 at 5:16pm by jaseline

Chemistry check
correct.
Wednesday, March 11, 2009 at 5:21pm by bobpursley

Chemistry check
Thanks again for your help
Tuesday, March 17, 2009 at 8:08pm by Mike

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
check your book
Wednesday, April 22, 2009 at 7:34pm by anon

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(check my answer)
A it is.
Thursday, April 29, 2010 at 9:40pm by DrBob222

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

Chemistry
Check my thinking on this.
Tuesday, July 27, 2010 at 11:55pm by DrBob222

Chemistry Check
You are correct.
Monday, August 30, 2010 at 9:04pm by DrBob222

Chemistry: Check
1. The amou
Tuesday, April 5, 2011 at 11:51am by Cheryl

chemistry(check my answer)
It's A
Thursday, April 29, 2010 at 9:40pm by Snake

Chemistry(please check, thank you!!)
Thank you!
Wednesday, October 5, 2011 at 7:24pm by Hannah

Chemistry (Check)
true
Saturday, January 13, 2007 at 10:24am by Jalen

Chemistry(Please check)
Yes
Sunday, October 30, 2011 at 12:37pm by DrBob222

Chemistry(Please check)
Thank you!
Tuesday, November 1, 2011 at 9:06pm by Hannah

Chemistry(Please check)
ok thank you
Saturday, January 28, 2012 at 11:41pm by Hannah

chemistry(Please check)
ok thank you
Friday, February 10, 2012 at 11:25pm by Hannah

Chemistry(Please check)
yes
Friday, February 10, 2012 at 11:32pm by DrBob222

Chemistry(Please check)
Thank you!
Friday, February 10, 2012 at 11:32pm by Hannah

Chemistry(Please check)
yes.
Friday, February 10, 2012 at 11:59pm by DrBob222

Chemistry(Please check)
Ok, thank you for your help!!
Sunday, February 19, 2012 at 6:07pm by Hannah

Chemistry(Please check)
ok
Sunday, February 19, 2012 at 11:21pm by DrBob222

Chemistry(Please check)
ok thank you!!
Saturday, March 3, 2012 at 7:12pm by Hannah

Chemistry - Please Check!
Thank you.
Wednesday, March 14, 2012 at 11:31pm by Hannah

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