Chemistry - August 2006

2006-08-27 14:10:58 · 7 answers · asked by Anonymous

She would like to put two liquids with different viscosities and with different colors in a plastic bottle so that, when shaken, it will turn to the color of the mixture but will separate out again into the individual colors. For example, she would like to have one liquid yellow and a second one blue so that when shaken, the mixture turns green. After some time, the liquids would separate and return to their original colors until shaken again. She saw such a mixture in a store a few years back but was not teaching at that time and she can't find them again. Any help would be greatly appreciated.

2006-08-27 13:58:05 · 4 answers · asked by Kojack 1

2006-08-27 13:45:14 · 11 answers · asked by Moon O 1

equation for sphere volume is 4/3 pi r cubed.

2006-08-27 13:10:05 · 3 answers · asked by Anonymous

Avogrado’s Number: The Mole
2.45) Use a factor derived from the relationships written in Exercise 2.43 and the factor-unit method to determine the following:

a) the number of moles of potassium atoms in a 50.0-g sample of potassium

b) the number of magnesium atoms in a 1.82-mol sample of magnesum

c) the number of tin atoms in a 200-g sample of argon

2006-08-27 13:08:36 · 4 answers · asked by ? 3

2006-08-27 12:37:13 · 4 answers · asked by aleisha h 1

beaker
flask
test tube
graduated cyclinder

2006-08-27 12:32:11 · 7 answers · asked by aleisha h 1

The density of a sodium sulfate solution is 1.07 g/cm3 The solution is 8.00% sodium sulfate by mass. How many cm3 of the solution are needed to supply 4.28 g of sodium sulfate?

2006-08-27 12:18:14 · 4 answers · asked by pilotmanitalia 5

2006-08-27 11:58:11 · 8 answers · asked by Rakitalo 2

If a 4.50 g sample of a Zn-Al-Cu alloy contains 2.45 g Zn and 1.34 g Al, what is the percent composition of Cu?

2006-08-27 11:51:22 · 2 answers · asked by Anonymous

In terms of the resonance to the structures of conjugate bases of these acids?

2006-08-27 11:44:58 · 2 answers · asked by Argentine futballer 1

Consider a brass alloy which contains 66% copper and 34% zinc. How many grams of zinc are present in a 125 g sample of the alloy?

2006-08-27 11:43:59 · 10 answers · asked by Anonymous

2006-08-27 11:15:42 · 23 answers · asked by jr.brash 1

I saw this on CMT's "Country Fried Home Videos", and got to wondering.....

Is it simply baking soda?

2006-08-27 11:11:52 · 34 answers · asked by Crystal L ™ 2

2006-08-27 11:09:18 · 3 answers · asked by silderice 1

2006-08-27 11:07:55 · 4 answers · asked by silderice 1

Does a temperature change always indicate that a chemical reaction has occured, explain.

2006-08-27 10:57:37 · 3 answers · asked by Ben W 1

why doesn't Br2 add ortho to the CHS in this molecule? Please click to view the molecule. Also, can you explain it? why the solutions manual says the Br is ortho to the N group? I would have thought sterics would inhibit that...

http://img.photobucket.com/albums/v103/photos4lj/ChemIndex_action.gif

2006-08-27 10:53:13 · 2 answers · asked by Anonymous

2006-08-27 10:23:12 · 2 answers · asked by redheadsushi86 1

Write ionic and net ionic equations for the following reactions

2 K3PO4(aq) + 3 Sr(NO3)2(aq) --->


Mg(NO3)2(aq) + 2NaOH(aq) ----->

someone please help me with these two problems. I'm confused

2006-08-27 09:49:20 · 3 answers · asked by Paul C 1

fill in the blank, please :)

2006-08-27 09:44:52 · 5 answers · asked by stranger 1

2006-08-27 09:38:41 · 6 answers · asked by river_of_darkness 1

2006-08-27 09:36:18 · 10 answers · asked by Patrina F 1

Also, what sort of effects do these (chemicals) have?

2006-08-27 09:07:42 · 8 answers · asked by paladin_hammer 1

A hydrocarbon (a) was found to have the molecular formula C10H12. some results from chemical reactions are as follows:

1) when (a) was reacted with ozone in the presence of aqueous acetic acid and Zn, it gave two prodects (b) and (c)

both of these products yeilded yellow solids when reacted with 2,4-dinitrophenylhydrazine in the presence of dilute HCL

What do these results tell you about (a), (b), (c)

2)when (b) was reacted with Tollens reagent, a silver mirrot formed on the walls of the test tube (positive result). THe compund (c) was a negative result. What do these results tell you about (b) (c)

3)When (b) was warmed with aqueous NaOH in the presence of iodine, yellow precip. of Chi3 formed. what does this indicate?

4) draw structure of (b)

5)(c) gave a positive iodoform rxn, also after idoform had been filtered off, benzoic acid precipitateed off. Draw (c)

6) (a) was one of 2 strucual formulas draw both

7) give acceptable (iupac) name for one of them

2006-08-27 09:06:50 · 4 answers · asked by Argentine futballer 1

1. an atom,an element and a mixture.
2.an atom,an element and a pure substance.
3.a molecule, a compound and a mixture.
4.an atom, a compound and a mixture.
5.a molecule,element and a pure substance.
6.a molecule, a compound and a pure substance.

2006-08-27 08:48:40 · 9 answers · asked by im M 1

How would you separate a mixture of octane, a major component in gasoline, and methyl t-butyl ether, a gasoline additive? Assume they have different boiling points and give a one-word answer.

a. filtration
b. distillation
c. chromatography

2006-08-27 08:36:15 · 5 answers · asked by Anonymous

Which of the following statements is true?

a. A heterogeneous mixture consists of identical particles equally spaced in a common volume.
b. A homogeneous mixture does not have the same composition throughout on the molecular level.
c. A mixture consists of particles that are identical on the molecular level.

2006-08-27 08:26:11 · 5 answers · asked by Anonymous

when removing the water of crystalisation, you are required to heat till constant weight. what does that mean?

2006-08-27 08:22:15 · 6 answers · asked by whack 1

2006-08-27 08:20:51 · 4 answers · asked by Shay-Shay 1