Chemistry - August 2007

2007-08-18 16:57:58 · 6 answers · asked by Anonymous

2007-08-18 13:29:18 · 3 answers · asked by Anonymous

heat is released in exothermic reactions that involve bond formation such as a ______ in which one _____ replaces another, depending on __________.

this problem is on the HSS book page 179 and
number of this question is 26.

this is concept map but i changed way to answer it like this.

please fill right words on blank line,

2007-08-18 13:23:13 · 1 answers · asked by EHAE 1

Please explain your answer and 1 quart is equal to 0.9464L.

2007-08-18 09:19:22 · 8 answers · asked by Troy B 4

2007-08-18 08:05:11 · 3 answers · asked by sasc42464 2

Here is my dilemma...

I was trying to use ammonia as an eco friendly refrigerant. Turns out it has a lot of issues.

1- It's corrosive to all metals with the exception of stainless steel. Fine! I'll use expensive stainless steel pipes.

2- It's used in the manufacturing of explosives! Crap! I can't use it. The Egyptian government is doing its best to prevent terrorists from getting what they need to manufacture explosives. So, they prevent average Alfred Q. Publics, like myself, from getting it.

Ammonia gas is highly soluble in water. It can also be absorbed by calcium chloride. It has a very low boiling point -33 Celcius. It is extremely corrosive. It is used in explosives.

Does anything exist that is either soluble in water or absorbed by some kind of salt and has a very low boiling point?

I'd prefer nothing corrosive.

But I sure DON'T want anything that can be used in explosives. Not even theoretically. :o)

Thanks a lot.

2007-08-18 07:28:22 · 2 answers · asked by Abdallah A 3

2007-08-18 06:49:39 · 1 answers · asked by Anonymous

2007-08-18 05:03:19 · 4 answers · asked by iloveCR7 1

When 2 elements bond together?
e.g. Oxgen and Magnesium bond together what is the name of this reaction?

2007-08-18 04:43:26 · 8 answers · asked by Anonymous

2007-08-18 04:15:15 · 5 answers · asked by Petroleum 1

1.What do the elements in a group have the same number of?
a. electrons
b.occupied energy levels or shells
c.electrons in the highest occupied energy level or outer shell.

and also if you know.

2. What do the elements in a peroid have the same number of?
a. electrons
b.occupied energy levels or shells
c. electrons in the highest occupied energy level or outer shell.


Please explain the answer because i want to understand it
THANK YOU.

2007-08-18 03:30:15 · 7 answers · asked by Anonymous

is it because of choice of axes is made by us or is it related to wave function?

2007-08-18 03:27:28 · 2 answers · asked by mathiphy 2

2007-08-17 22:38:43 · 3 answers · asked by Anonymous

>mossy zinc+copper(II) sulfate solution
>mossy zinc+copper(II) sulfate solution+6N HCl

please help

2007-08-17 21:47:56 · 4 answers · asked by Anonymous

what acids involved hydrogen when acted upon by metals?

and why?

2007-08-17 21:33:19 · 2 answers · asked by Anonymous

NAOH is a base . and it will rected with CO2 and give NA2CO3

2007-08-17 19:49:46 · 4 answers · asked by abc 1

Explain your answer briefly -( thats part of the question too )

We got this in an exam and im confused

2007-08-17 19:16:10 · 1 answers · asked by Anonymous

CH4+2O2=CO2+2H2O deltaH=-890kj CH4+2O2=CO2+2H2O deltaH=-802kj

2007-08-17 19:12:02 · 3 answers · asked by Anonymous

2007-08-17 18:59:36 · 2 answers · asked by Anonymous

Why is that burning coal can release more energy that just burning mere dry wood?

is it because hydrocarbons are formed only after exposure to heat, pressure and bacterial activities for millions of years?

What's the difference in the chemical composition of wood and coal?

Thanks!

2007-08-17 18:15:38 · 3 answers · asked by Anonymous

2. What will happen if an iron spoon is used to stir a 1M solution of aluminum chloride, AlCl3 (at 25 C)?

Thank you

2007-08-17 18:15:02 · 2 answers · asked by Ganbatteru 3

I sometimes mix my Sensodyne toothpaste with a fluoride treatment that contains stable stannous fluoride. Can these two chemicals react with one another?

2007-08-17 18:06:05 · 2 answers · asked by Deltaman 2

Keeping in mind that a large amount of H2SO4 has leaked into a freshwater environment (pond) harbouring plant and animal life. The result must ideally be a Precipitation Reaction.

Thanks Everyone
Bindy

2007-08-17 17:14:21 · 5 answers · asked by Bindy 3

2007-08-17 16:59:29 · 1 answers · asked by Lana 4

as i know the electron movement is indeterminated so i was wondering if electrons crash with other electron and what can cause.

2007-08-17 16:21:31 · 4 answers · asked by Anonymous

2007-08-17 14:39:32 · 7 answers · asked by akexyaya 1

ANSWER FAST WE NEED HELP!!!!!! :)

2007-08-17 13:45:04 · 5 answers · asked by neeka n 1

while KCl boils at 1680K

2007-08-17 12:48:01 · 1 answers · asked by Claire M 1

Is there a way to give them a patina?

2007-08-17 12:46:23 · 2 answers · asked by Anonymous

(i) Explain why the transition diamond --> graphite is expected to be thermodynamically favoured. (DeltaH = -1.9kJ/mol)

(ii) Explain why, despite this thermodynamic tendency, diamond exists?

2007-08-17 12:38:44 · 1 answers · asked by }{3@T 2