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DrBob222

Questions (104)

err
1. 1 answer
2. 6 views
What are the potential consequences of not re-equilibrizing the pressures inside and outside of the flask after heating a sample
1. 1 answer
2. 5 views
What pH buffer solution is needed to give a Mg2+ concentration of 3.0×10−2 M in equilibrium with solid magnesium oxalate?ksp
1. 1 answer
2. 487 views
You question has slipped below the "more" label at the end of the posts so I've recopied it here.https://www.jiskha.com/question
1. 0 answers
2. 287 views
How do I type Greek symbols on Jiskha with a normal keyboard? I see the&pi or &Delta or &lambda but that alone or in conjunction
1. 7 answers
2. 326 views
For your latest question, now not on this page, see
1. 0 answers
2. 349 views
12 tablets containing Fe(II) fumarate and inert binder are dissolved in 150 mL of 0.100 M HCl.Fe(II) is oxidized to Fe(III) with
1. 1 answer
2. 300 views
As asked by my professor for homework:Taking into account the varying degrees at which antimatter can form and function as
1. 0 answers
2. 299 views
Just a quick question to test your skills.What happens if you mix oxygen and nitrogen
1. 1 answer
2. 320 views
https://www.jiskha.com/questions/1837330/an-average-hot-water-tank-will-hold-300-0-l-of-water-needs-to-be-kept-at-65-0c-in-order
1. 0 answers
2. 588 views
What were prevailing styles of Gothic architecture?Select all that apply. ◻Gothic architecture followed classical Egyptian
1. 3 answers
2. 2,741 views
ScienceCHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model
1. 20 answers
2. 6,887 views
I see in the news reports that when the lava hits the ocean there is a spray of HYDROCHLORIC ACID. I don't see any way HCl can
1. 1 answer
2. 619 views
I posted a response to your Ksp/K but I was late doing it. Hope you saw it.
1. 2 answers
2. 585 views
I have posted an answer for your question on acetone and ethanol (equimolar solutions) to equal 1000 mL. It's back on page 3 at
1. 0 answers
2. 792 views
I posted a response to your last two queries and now I can't find your original question nor my answers.Did you get everything
1. 2 answers
2. 519 views
Your buffer problem has moved down quite a bit but I've responded to your last response with my own response.
1. 0 answers
2. 457 views
Regarding the FeO==> Fe(OH)3 problem below, take a look at the additional post. Here is the link.http://www.jiskha.com/display.c
1. 0 answers
2. 654 views
I responded to your post(the one on ratio of +/- charges) that's way down the list (I think on page 2 or 3 by now). Here is a
1. 0 answers
2. 587 views
I posted a response to that potentiometric analysis problem but it's pretty far down the list. Let me know if you can't find it
1. 0 answers
2. 414 views
Since you are a biochemist please look at the post below by C. I tried answering the question but I really don't understand the
1. 2 answers
2. 620 views
Where are you getting all of this stuff?What university/college? Where do the exercises(questions) come from? What sources to
1. 3 answers
2. 1,312 views
I named that compound as cis and it should be trans. The I atoms are on opposite sides and that's trans, not cis.
1. 0 answers
2. 535 views
I accidentally erased your post on the hydrolysis of various anions. The answer isKb(for the anion) = (Kw/Ka for the Ka for the
1. 0 answers
2. 586 views
I think you transposed the numbers for mass proton on your post yesterday which may be the reason you had trouble getting the
1. 1 answer
2. 675 views
I have a question my brother asked me but I need a math expert.You have two interlocking circles and the radius of circle B goes
1. 4 answers
2. 911 views
I have taken care of the answer to the SO3 ==> SO2 + O2 equilibrium problem that we worked on last night about midnight. You
1. 0 answers
2. 473 views
I responded to that chocolate milk/ice problem. Here is a link to it.http://www.jiskha.com/display.cgi?id=1357962576#1357962576.
1. 0 answers
2. 811 views
I have removed your extraneous answers from the last four or five posts. Please do not respond if you don't know the answer. If
1. 2 answers
2. 495 views
I have done as asked and worked that Na2C2O4 + LaCl3 problem in some detail. I've posted it at the ogiginal site; here is a hot
1. 0 answers
2. 499 views
If you have that question about the N2O4/NO2 equilibrium I can help if you re-post. I can't find it. I think you posted it
1. 0 answers
2. 457 views
I'm sorry to take so long to get back. All of the C atoms are sp2 hybridized. There are no sp3 hybridized C atomsHere is a link
1. 0 answers
2. 430 views
Here is the question you initially posted @ 10:22 last night (Sunday) with my responses. Here are the corrections I made. Check
1. 0 answers
2. 624 views
Posting the exact question more than once is superfluous and doesn't get an answer any faster. Miranda and another screen name
1. 2 answers
2. 576 views
Check below for the answer to your buffer question.
1. 0 answers
2. 522 views
Does anyone know details about quicken investment reports? My investment report suddenly won't work.
1. 1 answer
2. 663 views
Yvonne. Did you type all of the question about osmosis? correctly? I have struggled with it and something about it doesn't seem
1. 0 answers
2. 1,056 views
You have made a couple of uncalled for comments to a couple of questions. Your remarks are not only not necessary but they take
1. 0 answers
2. 826 views
solution is made by mixing 20.0 mL of toluene C6H5CH3d=0.867gmL with 150.0 mL of benzene C6H6d=0.874gmL.Assuming that the
1. 2 answers
2. 730 views
Sorry, but I made two errors.Monocalcium phosphate is monocalcium monohydrogen phosphate which is CaHPO4. The Ca is +2, H is +1,
1. 1 answer
2. 615 views
See the answer to the problem you posted about <sup>10</sup>E and <sup>11</sup>E. I unintentionally put the 10 and 11 as
1. 0 answers
2. 550 views
I would let #1 = x.Then #2 = x+1 #3 = x+2 #4 = x+3 The problem says we want the sum of the first three. That will be x + (x + 1)
1. 0 answers
2. 580 views
distance = rate x time ord = r*t car traveling 40 mi/hr goes 40 mi/hr x 1.5 hrs head start or 60 miles head start. Let t = time
1. 2 answers
2. 916 views
-856.7 kJ/mol is delta G<sub>f</sub><sup>o</sup>. Same book I used for you yesterday. Pretty good freshman text, huh? I think
1. 0 answers
2. 651 views
Breathing too much alcohol or too much HNO3 surely would not be very good but I doubt there would be a reaction that would
1. 0 answers
2. 530 views
Basically what color is yellow when they say "Yellow"?<b>The titrations I have done are light yellow when approaching the end
1. 0 answers
2. 933 views
delta G reaction = delta G products - delta G reactants.Hydrogen peroxide is used as a bleachin agent, a disinfectant and
1. 0 answers
2. 1,408 views
Do you know how to set up the ICE? That's what you need to do. If you know but are confused, tell us what you don't understand
1. 0 answers
2. 624 views
HCl is a strong acid and ionizes 100%.NaOH is a strong base and ionizes 100%. We have no way of knowing the pH of HCl + H2O
1. 0 answers
2. 830 views
Yes, both are endothermic; however, the first one is between gases and the second one APPEARS to be (it isn't balanced with
1. 0 answers
2. 607 views
As I read it, the question provides you with a word description of the production of diesel fuel, gasoline, lighter gases such
1. 0 answers
2. 656 views
Kw = KaKb. With this equation you can convert any Ka to Kb and the reverse.Codeine (Cod), a powerful and addictive painkiller,
1. 2 answers
2. 1,139 views
frozen carbon dioxide, CO2.what is dry ice
1. 0 answers
2. 1,206 views
Sorry about that. I don't know why it did that? I will try to recap the two or three sentences I read. The oxygen molecules
1. 0 answers
2. 1,086 views
I hope you come around often. We need someone with a little organic background. Mine is TOO little (and too late!).
1. 0 answers
2. 436 views
It forms NH4Cl, ammonium chloride, which is soluble in the water.
1. 0 answers
2. 547 views
http://www.google.com/search?hl=en&ie=UTF-8&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=trifluoroacetic+acid&spell=1What would
1. 0 answers
2. 1,001 views
Think about this. Then let us know what you think and why! The answer should be obvious if you think about it.A liquid in a
1. 0 answers
2. 1,183 views
Post your question. Perhaps we can help.Is there anyone out there who understands Q5 of tma06 for s103? I don't understand a
1. 0 answers
2. 573 views
I think, by convention, most would consider the solvent as the major component and the others as solutes. Actually, however, it
1. 0 answers
2. 629 views
Look on your calculator. You know the definition of pH. It is pH=-log(H^+). Well, we have the same thing in pKa, pKb, pOH, pKw,
1. 0 answers
2. 691 views
Is that 6%/year simple interest? If so, then$500 x 0.06 = $30 for one year. So for 90 days, $530 can't be correct. I would like
1. 0 answers
2. 609 views
Opinions are ok but anything with identifying information will be removed. In fact, why don't you retype your question and omit
1. 1 answer
2. 911 views
Look at the last response to your U-?? question. I wonder??That is what my book said...so I really don't know.
1. 0 answers
2. 456 views
Count the electrons. HCN I see 10.NCCN I see 18. What noble gas has an atomic number of 10? of 18? State the noble gas whose
1. 0 answers
2. 839 views
I don't think there is any benzene in Elmer's glue. In fact, I suspect finding something with benzene in it will be tough to do
1. 1 answer
2. 1,428 views
Everything is neutral. Touch a table, a chair, a desk, a tree, and you don't get a shock. Compounds are neutral. So Al2O3 must
1. 0 answers
2. 564 views
Al<sub>2</sub>Se<sub>3 (s)</sub> + H<sub>2</sub>O (sub>(l)</sub> ==> Al(OH)<sub>3 (s)</sub> + H<sub>2</sub>Se<sub>(g)</sub>You
1. 0 answers
2. 1,061 views
You do it by finding Uuh in the periodic table and knowing that it will have chemical properties that are similar to those in
1. 1 answer
2. 1,589 views
The atomic numbers and masses must added up on both sides of the equation just as we must have the same number of atoms on each
1. 0 answers
2. 785 views
Look at gold. It has an atomic number of 79. Adding 1 proton would make it have 80 protons and that element (from the periodic
1. 0 answers
2. 639 views
Let's do 1 and 2 and go from there. I will get you started.Take a 100 g sample. That means we have 19.9% C = 19.9 g C 46.7% N =
1. 1 answer
2. 764 views
3x-4 to y+15is constant and y=3 when x=2 then when y=12, x equals? My answer was 13. Im not sure how to solve this question.
1. 0 answers
2. 1,392 views
Are most factors unity?Is this True or false I'm thinkin true.. The actual size of a measurement multiplied by a conversion
1. 0 answers
2. 558 views
delta T = ik<sub>f</sub>mdelta T is the amount f.p. is lowered. i is the number of particles; i.e., Na<sub>3</sub>PO<sub>4</sub>
1. 1 answer
2. 5,005 views
L=lengthw=width ============ eqn 1 is 2L + 2w = 28 eqn 2 is w= (1/2)L+2 =========== solve for L and w. Post your work if you get
1. 0 answers
2. 854 views
762 + vp ethanol = total pressure.Dalton's Law of partial pressures. The total pressure in a flask containing air and ethanol at
1. 1 answer
2. 679 views
What I wrote is the balanced ionic equation. The ++ are written as exponents and could be written as we usually do it asCu^+2 +
1. 0 answers
2. 748 views
Those are the two COMMON oxidation states.What are the charges of the two ions of copper? +1 and +2. Copper(I) and copper(II).
1. 0 answers
2. 500 views
This may help a little. Although this may appear to be all about temperature, read thourough it and note that temperature
1. 0 answers
2. 602 views
Try MgBr2 and I expect you can balance it.i got a balancing equation problem i gotta get this to balance Mg(OH)2+ HBr --> MgBr +
1. 0 answers
2. 667 views
(aq) means the solution is dissolved in water used as a solvent. (l) means the COMPOUND (not element, usually) is a pure liquid.
1. 0 answers
2. 723 views
1. Should be 8a<sup>15</sup> but I think that is just a typo because the * and 8 are on the same key of the keyboard.2-4 look ok
1. 0 answers
2. 739 views
Was the five part unknown question for compounds A through E yours? If so, did you get it answered ok?no it was not mine! can
1. 0 answers
2. 654 views
When 2.5g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0 C, the temperature of the solution went up to 37.1 C.a.
1. 0 answers
2. 3,955 views
You give up too easily.How? I posted how to get the answer below at the original question. OK but I replied... As did I.
1. 0 answers
2. 821 views
Its been a long time since I did this but I believe you pick the longest chain. If there are double and triple bonds involved,
1. 1 answer
2. 877 views
x=12 so x is positive.is this equation negative or postive? 2x=3x-12
1. 0 answers
2. 426 views
CoCl2 is a compound that is blue when it is dehydrated and pink when in its hydrated form. I have seen a solution of CoCl2 used
1. 0 answers
2. 630 views
No question was posted. Try again.
1. 0 answers
2. 429 views
One way is to collect rain. Another way is to erect cone shaped metal objects on which water will condense at night and run into
1. 0 answers
2. 620 views
Looks like parade to me.what is this word here are the letter dapear http://www.ssynth.co.uk/~/anagram.html That is an easy to
1. 0 answers
2. 740 views
As an interested bystander, let me add just one bit to the replies and counter responses. It IS NOT correct Internet behaviour
1. 1 answer
2. 1,506 views
Go to www.webelements.com and click on neon (element # 10). You can read all about both physical and chemical properties of
1. 0 answers
2. 510 views
17.5 lbs x 20 min/lb = ??minNotice how the unit we don't want (lbs) cancel leving the unit we want (time in min). A turkey is to
1. 0 answers
2. 785 views
What do you think it does to the surface tension?why does adding soap to water reduce waters cohessiveness?
1. 0 answers
2. 494 views
Responded to the original post and follow up at original site. If you have trouble finding it I can come back and paste the
1. 0 answers
2. 686 views
I am assuming this is a 1,000g mixture.42% H3BO3 = 420g H3BO3/(420g H3BO3+580g H2O)= 0.42 by mass. 420g H3BO3/(420g H3BO3+580g
1. 0 answers
2. 646 views
Does anyone know where I can get a free MSDS sheet WITHOUT giving my complete biography? I don't mind an email address and even
1. 1 answer
2. 657 views
Tough pH question #2 answered on page 2 a/o midnight CDT. It will continue to move as time marches. I hope you see the post.
1. 0 answers
2. 528 views

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