Chemistry - May 2007

2007-05-10 04:28:08 · 2 answers · asked by Anonymous

2007-05-10 03:34:17 · 3 answers · asked by just thinking 6

do you have any ideas?

why earth borons?

2007-05-10 03:08:23 · 3 answers · asked by Zephyr_Seven 1

How do you tell if a reaction will be spontaneous or not? I have a test today, would really appreciate an explanation! Thanks

2007-05-10 02:03:09 · 5 answers · asked by Adria 2

That's what I've heard, but I'm still unsure. What's the scientific explanation?

2007-05-09 22:10:44 · 6 answers · asked by cashew 4

2007-05-09 19:31:21 · 2 answers · asked by Chris m 1

2007-05-09 19:07:13 · 2 answers · asked by Anonymous

2007-05-09 19:03:52 · 1 answers · asked by Anonymous

OH
|
CH3 - CH2 - CH - CH - CH3
|
CH3
I really need help with this. Is it 3 - methyl - 2 - Pentanol?

2007-05-09 18:53:55 · 2 answers · asked by Anonymous

look at the websites. http://www.blingh2o.com/store/ and http://www.thebigox.com/ Who the fuc k would buy these?

2007-05-09 18:38:26 · 2 answers · asked by Kyle V 1

What mass of the indicated solute does each of the following solutions contain?
(a) 3.00 L of 13.2 M HCl solution
(d) 3.71 L of 0.583 M CaCl2 solution

my answer for a) is 1443g and i got 2395g for d) but how can i write that number in 3significant. it is like 1443.54 for a) and 2395.44g

2007-05-09 18:28:50 · 1 answers · asked by Kevin 1

write the molecular, total ionic, and net ionic for
C3H8O + oxygen

2007-05-09 18:23:35 · 1 answers · asked by r 2

2007-05-09 17:31:53 · 1 answers · asked by ? 1

A. neutral
B. basic
C. acidic

2007-05-09 17:12:44 · 2 answers · asked by Anonymous

Chromium (III) flouride?
A. 1.6x10^-3 M
B. 1.2 x 10^-3 M
C. 6.6 x 10^-11 M
D. 2.2 x 10-3 M
E. 1.6 x 10-6 M

2007-05-09 17:06:19 · 2 answers · asked by Anonymous

A. the number of its protons.

B. the number of its protons plus the number of its neutrons

C. the number of its protons plus the number of its neutrons plus the number of its electrons

D. the number of its protons plus the number of its electrons

E. the number of its neutrons plus the number of its electrons

2007-05-09 17:03:55 · 5 answers · asked by stephanie c 1

A. 1.35
B. 2.35
C. 7.00
D. 11.65
E. 12.65

2007-05-09 17:03:08 · 1 answers · asked by Anonymous

explain

2007-05-09 15:42:56 · 5 answers · asked by ALI L 1

Bauxite ore contains aluminum oxide, which is decomposed using electricity to produce aluminum metal and oxygen. What mass of aluminum metal can be produced from 125 g of aluminum oxide?

I'm really confused and I need help. Thanks.

2007-05-09 15:23:35 · 3 answers · asked by Anonymous

in the production of 5.0 moles of MgO

2007-05-09 15:18:20 · 1 answers · asked by Ciavana 3

if you have 3 mol CH4, how many grams CO do you form .... CH4+O2--_CO+_H2O

2007-05-09 14:53:39 · 3 answers · asked by Anonymous

What power source? What water, if not tap water?

2007-05-09 14:46:42 · 5 answers · asked by baypointmike 3

2007-05-09 14:34:24 · 2 answers · asked by Anonymous

A solution is prepared by dissolved 15.0 grams of NH3 in 250 grams of water. The density of the resulting solution is 0.974 g/ml. Calculate the molality and molarity of NH3 in the above solution. Show work.

how do solve this problem?
thanks

2007-05-09 14:32:45 · 1 answers · asked by xyz 1

1) Dilute hydrochloric acid is added to a solution of potassium sulfite
2) A solution of sulfuric acid is added to a solution of barium hydroxide until the same number of moles of each compound has been added.
3) A mixture of solid calcium oxide and solid tetraphosphorus decaoxide is heated.
4) Sulfur dioxide gas is passed over solid calcium oxide
5) Solid zinc sulfide is heated in an excess of oxygen.
6) A solution of potassium iodide is added to an acidified solution of potassium dichromate.

2007-05-09 14:29:10 · 2 answers · asked by 2Quinn 2

1) When 6M HCl is added to the solution, a white precipitate forms. What cation(s) may be present in the solution?

2) When hot water is added to the precipitate, a white solid remains after filtration. What cation(s) may be present?

3) When the filtrate from (2) is cooled, a white precipitate forms. What cation(s) may be present?

4) When the precipitate remaining in (2) after filteration is treated with aqueous NH3, the precipitate completely dissolves. What conclusions can be drawn about the presence or absence of the cation(s) in the solution?

5) If HNO3 is added to the solution in (4), what would you expect to happen? Briefly explain please.

2007-05-09 13:44:21 · 1 answers · asked by Anonymous

a/b(a^2-x^2)^1/2

2007-05-09 12:31:18 · 1 answers · asked by kat4977 1

The equation for the total heat transferred in a chemistry lab is Q total = Q Heat of fusion + Q water
Then, where does the heat come from and go to specifically? I know that for heat of fusion (the heat comes from the ice cream mixture and goes to the salt and ice mixture), but I am not sure where the heat of water comes from???

2007-05-09 11:49:34 · 2 answers · asked by jmesmith 1

you have a 200 ml beaker with 200ml distilled water. You also have a 400ml beaker with 200ml corn oil.
1- which is more dense, the corn oil or the distilled water?

2- you add a block of softwood to the beaker with the corn oil and a block of softwood to the beaker with the water. what will happen?

3- would the blocks of wood float at the same level in both beakers? why or why not?

2007-05-09 10:56:50 · 3 answers · asked by nelly♥............... 2

2007-05-09 10:37:39 · 6 answers · asked by Camden O 2