Chemistry - November 2006

a. time
b. time ^-1
c. liters/mol
d. no units

2006-11-20 07:16:02 · 1 answers · asked by kelxcore09 1

Explain how a correctly written equation shows atoms are not lost in a reaction and this is not for school or class this is a question my friend has been asking me with so people shove off with the class jokes.

2006-11-20 07:13:44 · 4 answers · asked by artistmartista 1

2006-11-20 06:51:15 · 34 answers · asked by jane s 1

2006-11-20 06:32:11 · 1 answers · asked by DEBORAH H 1

Can anyone help with this - not sure if I'm doing it right! OK I need to give the 6 equations for the synthesis of hexamminenickel chloride and have been given the first and last ones. The first equation is
[Ni(H2O)6]2+ + NH3 <===> [Ni(H2O)5 NH3]2+ + H2O
(The arrow ment to be equilibrium arrow)

and the overall equation is;

[Ni(H2O)6]2+ + 6NH3 <===> [Ni(H2O)5 NH3]2+ + 6H2O

Am I right in thinking that each step would simply be as the first but with each step having one more molecule of NH3 and H2O each time e.g. step 2;

[Ni(H2O)6]2+ + 2NH3 <===> [Ni(H2O)5 NH3]2+ + 2H2O

and step 3;

[Ni(H2O)6]2+ + 3NH3 <===> [Ni(H2O)5 NH3]2+ + 3H2O

etc...


or am I doing it totally wrong! Any help would be very much appreciated as nothing in my textbook about it and it is for a lab tomorrow!!!

2006-11-20 06:20:35 · 1 answers · asked by Showaddywaddy 5

also i have other questions...

2. Breifly explain why the number of electrons circling the nuclus determines the physical and chemical properties of the atom.

3. How is it possible that only 92 elements are found in the natural world but the are millions of different types of substances?

2006-11-20 06:15:13 · 3 answers · asked by i_heart_jonathan<3 1

2006-11-20 05:23:47 · 11 answers · asked by baboo b 1

Aqeous silver nitrate was added to the solution of CaCl2 what would you expect to see? Thanks. I also have to write an ionic equation for the reaction, thats the bit i'm not really sure about!

Thank you,

Rock

2006-11-20 05:20:24 · 1 answers · asked by Anonymous

Boiling
Freezing
Adding bacteria
Non-optimal pH

(could be more than one right answer)

2006-11-20 05:18:56 · 3 answers · asked by csumicro 1

Are chemical bonds the same as molecular bonds. I have a true false question about a reaction that I know is a "molecular bond" but the answer uses "chemical bonds". Are they the same?

2006-11-20 05:15:08 · 1 answers · asked by csumicro 1

2006-11-20 05:14:56 · 3 answers · asked by barrelracer12 3

2(CH2OH)2 (l) + 5 O2 (g) > 4 CO2 (g) + 6 H2O (l)

The standered heat of combustion for ethylene glycol is -2356 KJ/mol.
CO2 (g) = -393.5 KJ/mol
H20 (l) = - 285.58 KJ/mol

2006-11-20 05:12:26 · 1 answers · asked by Nirmal C 1

Aqeeous silver nitrate was added to the solution of CaCl2 what would you expect to see? Thanks,

Rock

2006-11-20 05:03:08 · 4 answers · asked by Anonymous

I no that nuclear energy can be used to form distructive nuclear bombs but it can be also a very useful way to treat some diseases. Please explain to me this fact or support me with a website that dicusses this issue.
Thank you for your help.

2006-11-20 04:59:24 · 4 answers · asked by youyou 1

when we add Phenophlein to NaoH , it shows pink color. Why?

2006-11-20 04:53:33 · 3 answers · asked by haris 1

aluminum sulfide, aluminum nitride, magnesium nitride, potassium sulfide, calcium phophide, lithium iodide, iron 2 oxide, silver oxide, iron 3 chloride, calcium bromide, copper 1 bromide, beryllium oxide, lead 4 fluoride

2006-11-20 04:50:20 · 3 answers · asked by carboy_carlover 1

2006-11-20 04:46:51 · 5 answers · asked by elizabeth t 1

The highest possible oxidation state for the halogens is +7 and the lowest is -1.

2006-11-20 04:36:16 · 1 answers · asked by bebop_0632 1

Na3n plaese tell me tha names of those compounds

2006-11-20 04:34:27 · 6 answers · asked by carboy_carlover 1

Hi,

Not quite sure how to do this question:

(i) In 2000, the mass of CO2 emitted in the UK was equivalent to 1kg per person in every hour.

Calculate the volume of 1kg of CO2. Assume that 1 mole of CO2 occupies 24dm3.

Thanks,

Rock

2006-11-20 04:32:50 · 3 answers · asked by Anonymous

2006-11-20 04:27:53 · 8 answers · asked by Anonymous

Carbon dioxide can be prepared easily in the laboratory by the action of heat on most carbonates. Construct an equation to illustrate this reaction.

Thanks

2006-11-20 04:25:51 · 2 answers · asked by Anonymous

Is it evaporation?

2006-11-20 04:20:38 · 17 answers · asked by pants1610 1

and makes an effort to keep away from the region of the Geiger counter. What is your advice to the 2nd friend?

2006-11-20 04:15:39 · 7 answers · asked by wildbutterflychick 2

How many grams of salt do I need to add to water to get normal saline which is 0.9%NaCl? Similarly, how many grams of salt do I need to add to water so that I can get 23.4%NaCl solution?

2006-11-20 04:08:28 · 3 answers · asked by curious 2

I'm doing an AP Chemistry career paper on chemistry and Pharmaceuticals, and I need all the information I can possibly get. PLEASE HELP!

2006-11-20 03:47:09 · 3 answers · asked by Mickie 2

a)By what possible mechanisms of action could this drug work? List only 2 methods.
b)the chemical could affect either the presynaptic or postsynaptic membrane?

(PLEASE HELP ME HERE..I HAVE A TEST)

2006-11-20 03:41:35 · 2 answers · asked by Ashley 1

How does the catalyst decreases the activation energy of a chemical reaction

2006-11-20 03:26:39 · 4 answers · asked by kms 1

2006-11-20 03:09:44 · 4 answers · asked by Anonymous

2006-11-20 03:05:57 · 1 answers · asked by ANGELIC F 1