Chemistry - May 2007

2007-05-10 15:51:14 · 3 answers · asked by JOSEPH M 1

....which reaction (forward, reverse, or neither) will be favored.

H2(g) + Cl2(g) <--> 2HCl(g) + 184kJ

a-addition of Cl2
b-removal of HCl
c-increased pressure
d-decreased temperature
e-removal of H2
f-decreased pressure
g-increased temperature
h-decreased system volume

2007-05-10 15:22:59 · 3 answers · asked by tigers#1_lover 1

2NO(g) + O2(g) <--> 2NO2(g)

A-increased pressure
B-decreased pressure

2007-05-10 15:19:36 · 3 answers · asked by tigers#1_lover 1

how does drain cleaners work in terms of NaOH? and what metal particles are in the drain cleaners?

2007-05-10 15:19:06 · 1 answers · asked by Tammy 2

2007-05-10 15:16:24 · 1 answers · asked by maria 1

what happens when you mix ammonia and bleach together??
what can it do to a human??
can you give me any sites that have information about this??

2007-05-10 15:15:20 · 1 answers · asked by Garrett H 2

Iron (III) Chloride has the chemical formula, FeCl3.

What is the percentage composition of Fe by mass?

What is the percentage composition of Cl by mass?

2007-05-10 15:11:41 · 2 answers · asked by Anonymous

I'm sure this has been asked and i'm really sorry but i am having trouble understanding saturation. What is the difference between saturated, unsaturated, & super saturated?

*If someone could give me an example of them beyond a definition, that would be amazing*

2007-05-10 15:10:54 · 2 answers · asked by Anonymous

....to the point at which equilibrium is established for the reaction A+B<-->C+D

2007-05-10 15:07:36 · 1 answers · asked by serene 1

Why do substances react chemically?

Describe what a chemical equation is.

State the law of conservation of mass and explain its role in
chemical equations.

What is a coefficient?

What is the difference between H2O2 and 2H2O

What is activation energy? How is it affected by a catalyst?

Explain how the energy content of the products of a reaction compares with that of the reactants when the reactions is exothermic...When it is endothermic.

Use the collision theo to to explain the effects on reaction rate of increased concentration, catalysts, and increased surface area.

Give two reasons why collisions between molecules of reactants may not be effective in forming products

Please help i really dont understand this
Im sorry for the trouble and thanks in advance

2007-05-10 15:05:04 · 1 answers · asked by i am what i am 2

NaIO3
KI
Cd(NO3)2
NH4IO4
CdCI2
CsNO3

i think it's either NaIO3 or Cd(NO3)2, but i'm not sure

2007-05-10 15:00:43 · 2 answers · asked by serene 1

Ok, I've got a problem... The question is 'Solutions of silver nitrate and sodium chromate are mixed. Write the equation, balanced and in net ionic form. What is the oxidation number of chromium in the chromate ion?
I need help on if my equation is correct, and how to write it in net ionic form.

I think the equation is:
AgNO3+Na2CrO4=AgCrO4(s)+NaNO3

The oxidation number of Cr is +5? I am very confused, so any help would be greatly appreciated!

2007-05-10 14:56:54 · 2 answers · asked by J.S. 2

I have a final project to do and I need to know how to name acids, polyatomic ions, covalent compounds and such like that. Thank you

2007-05-10 14:42:09 · 3 answers · asked by Anonymous

i need to find out what elements are in our atmosphere & the reason why there their & also which of these elements ure sucked from the sky for govenred use?

2007-05-10 14:38:12 · 4 answers · asked by heshmaster_hookah 2

2007-05-10 14:08:42 · 5 answers · asked by number1galleta 1

when a force is applied to an ionic compound and the ions are repositioned so that like-charged ions are located t to each other, what next happens to the compound?

2007-05-10 13:46:22 · 1 answers · asked by Steff 2

2007-05-10 12:35:47 · 1 answers · asked by Anonymous

Write an equation for the reaction of adipic acid (HOOCCCCCCOOH) and potassium hydroxide (KOH).

2007-05-10 12:20:08 · 2 answers · asked by Kristin H 1

Where can we buy dry ice? Don't say online somewhere at a local store like walmart or something or gas station

2007-05-10 11:16:16 · 8 answers · asked by alex n 1

If it could be balanced, too, that would truly be wonderful. PS. A neutralization reaction is one in which an acid reacts with a base to form a salt and water.

Thanks again for your help!

2007-05-10 10:27:15 · 4 answers · asked by fermanator24 2

(there's a problem in this question that I had to find. The answer was given to me... the final answer should could out to -75.2 kJ/mol. Just need to find out how I get to that answer, the work)

The chemical equation is…

N2 (g) + 3H2 (g)—> 2NH3 (g)

Using the S^0 values, and calculate the (▲H^0f) for the formation of ammonia.


Substance_______(S^0)____________2(H^0f)
N2 ____________191.5_____________0.0
3H2____________3(130.6)=391.8_____0.0
2NH3___________2(192.5)=385______2(-46.2)= - 92.38

2007-05-10 10:25:42 · 2 answers · asked by JaMES B 1

2007-05-10 09:54:56 · 1 answers · asked by Anonymous

2007-05-10 08:17:56 · 8 answers · asked by julie 1

2007-05-10 07:45:42 · 9 answers · asked by jenny o 1

2007-05-10 07:34:24 · 1 answers · asked by Anonymous

I took a picture of the question: http://i66.photobucket.com/albums/h258/nostabenitsirhc/chemm.jpg

I don't know why I got this one wrong on my test. I put D. Could someone tell me the right answer, and why it is right?

2007-05-10 07:23:57 · 2 answers · asked by um yea hi 4

WHICH ONE OF THE FOLLOWING REACTIONS IS THIS DEMONSTRATED?

A. 3 Sr(NOsub3)sub 2 + 2 Ksub3POsub4 --> Srsub3(POsub4)sub2 + 6 KNOsub3

B. CuClsub2 + NHsub4NOsub3 ---> Cu(NOsub3)sub2 + 2NHsub4Cl

C. BaClsub2 + 2 NaNOsub3 ---> Ba(NOsub3)sub2 + 2 NaCl

D.(NHsub4)sub2COsub3 + Ksub2SOsub4 + Ksub2COsub3

E. NaNOsub3 + KCl --> NaCl + KNOsub3

I don't get this some please help. You may have to write this out on a piece of paper the proper way. I don't understand this!

2007-05-10 07:21:06 · 1 answers · asked by Jessica A 1

The reaction between aluminium and iron oxide is used to weld together railway lines, the aluminium displaces the iron; but why is the iron that is left molten?

2007-05-10 06:36:10 · 1 answers · asked by pogzemily 2

Aluminium displaces iron oxide, so it is more reactive. However, if equal size pieces of iron and aluminium are left outside, iron corrodes and aluminium appears not to, why?

2007-05-10 06:33:52 · 6 answers · asked by pogzemily 2

chemistry help please!

2007-05-10 05:30:32 · 3 answers · asked by frenchychiffon 2