Science & Mathematics - 21 November 2007

Neglect overpotential and determine the minimum potential required to electrolyze molten CrCl3.
Possible answers: 0.8V, 1.1V, 1.4V, 1.7V, 2.0V, 2.3V

b)How grams of Cr would be deposited and
c)how many liters of Cl2 gas would be produced at 184 degree C and 1.09 atm by passing a current of 26.0 A for 16.0 hrs?

2007-11-21 17:01:58 · 1 answers · asked by Anonymous in Chemistry

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Electrolysis (Cr/Cr^3+//Ni^2+/Ni)?

Use the following cell to answer the questions:

Cr / Cr3+ (1.00 M) // Ni2+ (1.00 M) / Ni.

a) How many milligrams of Ni would be plated on the cathode if a current of 0.37 A is drawn for 3.5 hrs?
b) What is [Cr3+] when [Ni2+] has dropped to 10-4 M?
c) What is the cell potential at the conditions described in Part b?

2007-11-21 16:57:23 · 1 answers · asked by Anonymous in Chemistry

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How do you solve this? -x^(2)=4? what is x=?

2007-11-21 16:48:30 · 6 answers · asked by remote control 1 in Mathematics

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In a state lottery can win 1st prize by selecting 6 numbers from 1 through 54. Find the probability of winning

This is a math problem probability theory.
Anyone know how you go about doing this problem?
I did the combination formula and found out there are 25,827,165 million different combinations of 6 numbers between the numbers of 1-54. Is the probability of winning 1/25,827,165?

2007-11-21 16:41:06 · 7 answers · asked by the worr e ore 5 in Mathematics

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Trig: Vector?

Look at this picture. What are the tensions in the two cables?

http://i2.photobucket.com/albums/y6/VietIronChef/math.jpg

2007-11-21 16:39:28 · 3 answers · asked by Anonymous in Mathematics

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Inertia is non-quantifiable. Is that a fancy way of saying, we haven't got a clue?

2007-11-21 16:24:49 · 5 answers · asked by ricnoodle 4 in Physics

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6" Reflector telescopes on Ebay...worth it or not????

Are these telescopes worth the 159 dollar price tag or has quality been compromised?

2007-11-21 16:24:19 · 5 answers · asked by justask23 5 in Astronomy & Space

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Dosage Of Amoxicillin?

correct dosage for 9 year old. (pill form)

2007-11-21 16:21:15 · 2 answers · asked by Anonymous in Medicine

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Is there intelligent life in others planets like on earth?

2007-11-21 16:18:07 · 12 answers · asked by JuanSC 2 in Astronomy & Space

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does slightly soluble mean insoluble? (chemistry)?

2007-11-21 16:12:08 · 7 answers · asked by Anonymous in Chemistry

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Space picture question.?

I am just curious. The pictures that the Hubble Space Telescope takes always look crazy awesome and stuff.. but I know this is because they are shown with a combo of x-ray images and other filters and stuff. My question is, what would the nebulas look like if saw it with your own eyes (like the one in the link below).

http://upload.wikimedia.org/wikipedia/commons/thumb/9/97/Stellar_spire_eagle_nebula.jpg/296px-Stellar_spire_eagle_nebula.jpg

2007-11-21 16:10:23 · 8 answers · asked by Anonymous in Astronomy & Space

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Can anyone answer this for me, please?

Consider the following system at equilibrium: A(aq) B(aq) <--->2C(aq)
Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction.
Increase [A], Increase [B], Increase [C], Decrease [A], Decrease [B], Decrease [C], Double [A] and halve [B], Double both [B] and [C].

2007-11-21 16:09:34 · 5 answers · asked by Anonymous in Chemistry

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what is the only animal with four knees?

2007-11-21 15:58:55 · 7 answers · asked by spanky m 3 in Zoology

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triangle or trig problem?

I always thought a 3,4,5 triangle had angles of 30 60 and 90 deg
If so then the sin of 30 is not 1/2 but 4/5..huh..?

2007-11-21 15:56:39 · 6 answers · asked by c0cky 5 in Mathematics

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Sin A=-4/5 Sec B =5/3. A is a third quadrant angle B is a first quadrant angle What are sin(A+B) and tan(A+B)?

2007-11-21 15:46:59 · 3 answers · asked by James D 1 in Mathematics

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What is logistic regression (i can't understand the definition in websites)? And what is its distinction?

2007-11-21 15:46:28 · 1 answers · asked by Anonymous in Mathematics

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What would happen if a normal person took anti-depressants?

such as Luvox? Luvox works to balance brain chemicals...what if your brain chemicals are ok but you took Luvox anyways?

2007-11-21 15:42:31 · 7 answers · asked by Tina 2 in Medicine

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How much do pentothal (3-5grams), Pavulon (100milligrams), and Potassium chloride (100milliequivalents) cost?

Yes, I know that they are used for lethal injections in the U.S., but I need to know how much they would cost so that I could tell people how much their life is worth. No hater comments please! If you don't think it's funny, you can leave. All answers are appreciated. Thank you.

2007-11-21 15:39:12 · 4 answers · asked by Yefim 2 in Medicine

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What does the word 'reagent' mean in relation to chemistry?

2007-11-21 15:38:34 · 3 answers · asked by lolly 3 in Chemistry

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What are some good telescope brands that aren't too expensive..?

I want to buy one for my husband who has expressed an interest in astronomy.. but he isn't a professional.. just an amateur.. any suggestions.. and maybe where I can buy one online..?

2007-11-21 15:38:17 · 7 answers · asked by Sarah M 2 in Astronomy & Space

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chemistry- acids and bases?

Arrange the acids
I) phosphorous acid (H3PO3),
pKa1 = 2.00;
II) hydrogen selenate ion (HSeO¡
4 ), pKa = 1.92;
III) selenous acid (H2SeO3), pKa = 2.46;
IV) phosphoric acid (H3PO4), pKa = 2.12;
in increasing order of strengths.
1. Cannot be determined
2. IV, III, I, II
3. III, I, IV, II
4. IV, I, III, II
5. None of these
6. II, I, IV, III
7. III, IV, I, II
8. II, I, III, IV
9. II, IV, I, III
10. II, III, I, IV

2007-11-21 15:35:40 · 1 answers · asked by Jack L 1 in Chemistry

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Which of the following statements are true for the reaction HC2H3O2(aq) + KOH(aq) -->?

a) C2H3O2 -(aq) is a product
b) When balanced the coefficient of KOH(aq) is 1
c) Ions cannot appear in the net ionic equation because they always cancel out on both sides of the equation
d) H+(aq) does not appear in the net ionic equation
e) K+(aq) appears in the net ionic equation

2007-11-21 15:34:51 · 1 answers · asked by Anonymous in Chemistry

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chemistry- acids and bases?

Calculate the pH of a solution that is 0.6 M
in sodium acetate and 0.2 M in acetic acid.
Ka = 1.8 x 10-5 for acetic acid.

2007-11-21 15:34:09 · 2 answers · asked by Jack L 1 in Chemistry

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Can you eat mongoose?

Since they are an invasive specie I just want to know if you can eat them, so we could control their population.

Some chinese eat the mongoose for medicinal reasons they believe. I'm not sure though, they might be infected or tainted somehow.

If it were okay to eat, I would see if it were good to put in chili, or mongoose and peas, mongoose burgers, mongoose stew.

It sounds good but I say the meat might be stringy since they run around a lot, I'll just have to see after I know it's safe first.

2007-11-21 15:33:35 · 2 answers · asked by Anonymous in Zoology

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What is the "Human" contribution to Global warming?

I don't want to know general things that cause global warming. I want to know what is the one thing from Humans that scientifically contributes to global warming. FROM HUMANS(Not from things they do)

2007-11-21 15:29:23 · 3 answers · asked by Anonymous in Biology