Chemistry - May 2007

2007-05-18 12:18:37 · 4 answers · asked by Anonymous

I found a really nice crockery pitcher. The outside is the normal crock coloration with 2 thin circular blue lines as decoration. I want to use the crock for drinking water, ice tea, etc. There is no potters mark on the bottom but am pretty certain the product is made in the U.S. Both glazes were applied in one coat.

2007-05-18 08:39:37 · 2 answers · asked by kriend 7

2007-05-18 08:00:38 · 3 answers · asked by Anonymous

If chromium has a reduction potential of -0.74 V, and copper has a reduction potential of 0.52 V and they are placed in contact in a solution of saltwater, then which of these (it's probably more than one) will happen?

1) Copper will be oxidized.
2) Chromium will act as an oxidizing agent.
3) Chromium will be oxidized.
4) Copper will act as a reducing agent.
5) Copper will act as an oxidizing agent.

2007-05-18 07:56:08 · 3 answers · asked by Random G 3

2007-05-18 07:31:24 · 7 answers · asked by babygirl_149113 1

2007-05-18 07:27:48 · 14 answers · asked by siddharth b 1

2007-05-18 06:24:21 · 2 answers · asked by debbur64 1

I obtained the energy value in Rydberg and was asked to calculate the energy difference in Rydberg and then convert it in Joules.

2007-05-18 06:22:54 · 2 answers · asked by Djoanna Maria T 1

NaOH(s)+HCI(g)->H2O(g)+NaCI(s)

2007-05-18 06:19:19 · 2 answers · asked by debbur64 1

Which of these is always true during the operation of an electrochemical cell?

1) A spontaneous reaction occurs.
2) An external voltage must be applied.
3) The salt bridge allows negatively charged particles to pass.
4) The emf of the cell increases over time.
5) Electrons move away from the anode.

2007-05-18 06:19:18 · 5 answers · asked by Random G 3

2007-05-18 06:13:59 · 11 answers · asked by ♥Crazy♥ 2

K+Br2-->
H2+Cl2---->
Ca+Cl2----->
Li+O2----->

2007-05-18 06:08:05 · 2 answers · asked by chris b 1

My deck was already painted when I moved in and the paint has baked on there enough to where powerwashing didn't do the trick. Not sure of the effects of Muriatic Acid on wood. Any info would be helpfull.

2007-05-18 06:00:48 · 3 answers · asked by jneal83 2

2007-05-18 06:00:45 · 2 answers · asked by mgp_chem88 1

I have about two ounces of liquid mercury in sealed glass that I've had since my husband died and would like to be able to sell it if possible, otherwise where would one dispose of such a thing?

2007-05-18 05:57:59 · 10 answers · asked by dazed1 2

2007-05-18 05:56:51 · 2 answers · asked by Anonymous

Okay so I'm a little confused. The paper says that It accompanies other radiation such as alpha or beta decay but does not change the atomic number or the mass number of the nucleus since gamma radiation does not contain any protons or neutrons ([sup]0 [sub]0 γ).

So for these equations, how would I complete this?

[sup]212 [sub]84 Po ---> ___ + [sup]4 [sub]2 He
[sup]81 [sub]34 Se ---> ___ + [sup]0 [sub]-1 e


FYI: [sup] = superscript. the number is supposed to be smaller and higher up.

[sub]= subscript. the number is supposed to be smaller and lower down.

like in a chemical equation =]

2007-05-18 05:55:34 · 3 answers · asked by jenn ayr 2

2007-05-18 05:55:17 · 4 answers · asked by Random G 3

a) a carboxylic ester
b) an amide
c) an anhydride
d) an acyl chloride

Can somebody explain what the answer is and why? Thanks!

2007-05-18 05:47:17 · 4 answers · asked by Naeem M 1

If increasing electronegativity means that the corresponding anion is more stable, then would you expect that Iodine I2 would be able to oxidize flouride ion to flourine?

2007-05-18 05:38:53 · 4 answers · asked by Djoanna Maria T 1

(1.) H+ + NO3¯ + H2S → H2O + NO + S

(2.) Cr2O7¯² + I¯ + H+ → Cr+³ + I2 + H2O

(3.) IO4¯ + I¯ + H+ → I2 + H2O

2007-05-18 05:32:29 · 4 answers · asked by Anonymous

2007-05-18 05:31:41 · 2 answers · asked by debbur64 1

2007-05-18 04:57:21 · 1 answers · asked by Patrick C 1

ch2=ch--ch=chch3

could you also explain the "cis" and "trans" part of this, if there are any involved

I got 1,3-pentadiene, but since there is a double bond in there I could be wrong, but there no way to tell if there on the same side or not.

2007-05-18 04:43:34 · 7 answers · asked by Flaming Pope 4

this is a stupid question i know... but what is the basis behind water wetting something? Like what happens when water hits a paper towel. it gets wet. What is going on exactly. If it is absorbed, why do they call it absorbed if its still wet?

2007-05-18 04:35:31 · 8 answers · asked by mike b 1

I really need help! My guess seems incorrect, because on the product side of the equation, I get two aqueous products.

---> NaHSO4 + H2CO3

But the question wants the net ionic equation, which can't be obtained if products are both aqueous!
Please help!

2007-05-18 04:30:45 · 5 answers · asked by ovenmits1 2

all the kinds of fuels but not the fossil fuel and not the alternative fuel types

2007-05-18 04:15:29 · 1 answers · asked by harishsatishchandra 1

Afromomum melongueta

2007-05-18 04:07:21 · 1 answers · asked by mwongyera a 1

NaCl + alcohol Immiscible
NaCl + vegetable oil Immiscible
NaHCO3 + H2O Miscible
NaHCO3 + alcohol Immiscible
NaHCO3 + vegetable oil Immiscible

can any one explain "ALL" of these observations in terms of bonding and polarity. If any of the observation is wrong plz also correct it as well.. Thanks

2007-05-18 03:57:58 · 1 answers · asked by Anonymous

I was using my highlighter and suddenly realised my amazement at how bright it is please tell me how they do this, what is the magic ingredient?!

2007-05-18 03:07:38 · 2 answers · asked by jennaplater 1