Chemistry - January 2007

For Hydrogen, why is the energy state of an electron in hydrogen atom only depend on n??

2007-01-01 16:37:06 · 3 answers · asked by gold_sunlight.2007 1

2007-01-01 16:27:27 · 9 answers · asked by lj 1

2007-01-01 16:25:37 · 9 answers · asked by vishnu 1

a. break down of 1g of salt into its molecular components?
b. break down of 1g of sugar into its molecular components?
c. burning 5 large logs of wood
d. burning 3 tons of coals?

I think its B, but I am not sure. Please explain

2007-01-01 15:58:34 · 5 answers · asked by Azumi 2

2007-01-01 15:49:42 · 2 answers · asked by niki347 1

I need any object that is made from petroluem.

2007-01-01 15:35:32 · 4 answers · asked by LuvU 1

2007-01-01 15:32:33 · 2 answers · asked by Anonymous

How to prepare 1 mole of sucrose soultion? What is the osmolarity of this solution? (hint: one molar solution of a substance contains 1 mole of that substance dissolved in 1 litre of water)

2007-01-01 15:11:45 · 1 answers · asked by Tavis T 1

My son (6) and I are doing a series of little science experiments. We knew about this one but don't know why this happens. We get a glass of vinegar and add a spoonful of bicarb soda and the result is a fizzy type erruption. Why is this the result of these two products mixing? In SIMPLE six year old terms, thank you.

2007-01-01 15:08:15 · 6 answers · asked by T 3

Does anyone know who discovered propylene?

Or the ancient usage of propylene?

I can't find any websites that has this information...


Thanks.

2007-01-01 14:57:08 · 5 answers · asked by Anonymous

A mass of 100 grams of potassium nitrate is dissolved in 100cm3 of water at 80 degrees C.

2007-01-01 14:00:03 · 3 answers · asked by tayholbub 1

sugar, salt, starch.and what compound is presented by copper and oxygen?

2007-01-01 13:54:37 · 12 answers · asked by needhelp 2

2007-01-01 13:47:35 · 3 answers · asked by duh24duh24 2

help me please
i am extremely curious how the hot pack and cold pack work.
what i mean is the packs which are used for muscle relaxation usually in sports.
do u know?

2007-01-01 13:46:48 · 5 answers · asked by Heizel T.M 2

It's for a science project.

2007-01-01 13:43:58 · 5 answers · asked by sugarpuffy13 2

Is propylene natural or man-made?

can it create pollution?

is it combinable with other substances?


Thanks.

2007-01-01 13:38:44 · 7 answers · asked by Anonymous

Which statement best compares the atomic radius of a potassium atom and the atomic radius of a calcium atom?

1)The radius of the potassium atom is larger because of its larger nuclear charge.

2)The radius of the potassium atom is larger because of its smaller nuclear charge.

3)The radius of the potassium atom is smaller because of its smaller nuclear charge.

4)The radius of the potassium atom is smaller because of its larger nuclear charge.

2007-01-01 13:37:49 · 5 answers · asked by Anonymous

The somewhat common reaction where the two clear liquids turn into a precipitated foggy liquid, and then allowing the copper to sink in and develope a silver cover. What is the chemical formula for this reaction?

2007-01-01 13:24:23 · 3 answers · asked by rakham22 1

What is the chemical property of propylene?

What is the physical property of propylene?

and what type of organic chemical compound is it?

Please let me know if you know.

Thanks.

2007-01-01 13:22:36 · 4 answers · asked by Anonymous

which compound is colorless in a water solution?

1. Cr2(SO4)3
2. Al2(SO4)3
3. Co2(SO4)3
4.Fe2(SO4)3

2007-01-01 13:17:17 · 3 answers · asked by Jesse C 2

Water ruins a computer right? Why not pour water on a bomb?

2007-01-01 13:06:26 · 9 answers · asked by Anonymous

Do Iconic Compounds conduct electricity in Alcohol? Why or Why not?

Also, why is distilled water not supposed to conduct electricity?

Lastly, does Alcohol and does Ammonia (separately) conduct electricity and why/why not?

Thanks

2007-01-01 12:43:01 · 4 answers · asked by Anonymous

2007-01-01 12:41:08 · 4 answers · asked by wondering? 1

is it because they dont have freely moving mobile particles?

2007-01-01 12:39:05 · 7 answers · asked by Anonymous

2007-01-01 12:18:26 · 9 answers · asked by Hanh T 2

2007-01-01 11:57:45 · 10 answers · asked by Anonymous

The question is to give the structural formula of the following:

3-chlorohexa-2,4,-diene

Does the diene at the end mean a 2 double bonds? And then how is its structural formula?

2007-01-01 11:42:16 · 5 answers · asked by }{3@T 2

is it a dangerous reaction? on a scale from 1-10 (1 being safe, and 10 being dangerous) how would you rate the reaction?

2007-01-01 11:29:01 · 6 answers · asked by Anonymous

if i use 10mL of 0.5M HCl how much of the NaOH would i need to balance it out?

2007-01-01 11:25:01 · 5 answers · asked by Anonymous

2007-01-01 11:12:30 · 2 answers · asked by tehcheatpwns 1