Chemistry - August 2007

Could it be H2S(g) + Ag(l) -> Ag2S(l) + H2(g)? Could it be reversible I wonder.

2007-08-27 01:06:22 · 2 answers · asked by mrsjoshgroban 1

i neeed this info for my important test tom.
pls tell my which one to use.
this is my first year of pure chem so i only need to know which one to use.

2007-08-27 00:23:18 · 3 answers · asked by Anonymous

1. CH3(CH2)3CH3
2. (CH2)3
3. CH3CBr2CC13
4. CHI3

2007-08-26 22:11:29 · 2 answers · asked by lamide e 1

For example ZnO+NaOH

2007-08-26 21:30:19 · 1 answers · asked by Anonymous

2007-08-26 21:18:39 · 1 answers · asked by cheesecurls 1

2007-08-26 21:11:24 · 6 answers · asked by Anonymous

write it as 3Cl2 +xxx -> xxx + yyy
or as 6Cl +xxx -> xxx + yyy
because i know you would write it as 6Cl if it had been broken down into ions from a molecule but as this im not sure

2007-08-26 21:03:04 · 1 answers · asked by Anonymous

Leave spectator ions in please.

2007-08-26 20:47:36 · 3 answers · asked by Anonymous

i'm a student of pcm n taken drop.

2007-08-26 20:47:04 · 1 answers · asked by Anonymous

PH3 + O2 ---> P4O10 + H2O

2007-08-26 20:05:26 · 5 answers · asked by EE 2

1)Enthalpy
2)Element of symmetry
3)Entropy and Enthalpy
4)Entropy

2007-08-26 18:53:26 · 3 answers · asked by Anonymous

I am asked to find the percent ionic character of CaF_2 and SiO_2.

I am given the formula %ionic character = {1-exp[-.25(x_a - x_b)^2]} x 100

My problem is that I don't understand what the formula means. What is exp? I know x_a and x_b are electronegativities.

2007-08-26 18:46:14 · 1 answers · asked by Vu 3

Please give a URL to a tutorial,or give me what materials to use.

2007-08-26 17:50:00 · 8 answers · asked by leianna_mae 2

Is melting ice a physical or chemical change?

2007-08-26 15:48:51 · 11 answers · asked by sophesticatedsophia 1

the pH of a 0.02M solution of a weak acid was measured to be 5.2. What is the [H+] of this solution? What is the Ka of this solution?

2007-08-26 13:00:56 · 1 answers · asked by jon st. germain 1

Identify each of the following items as a mixture or a compound. Classify the mixtures as homogeneous or heterogeneous

1.) raw egg
2.) ice
3.) gasoline
4.) blood

2007-08-26 12:10:37 · 7 answers · asked by tenizgurl7 3

H2O2 and 2OH-

1. how are these species different

2007-08-26 11:29:01 · 2 answers · asked by ThePrince 2

without having to freeze the container it is in.

2007-08-26 11:11:12 · 3 answers · asked by lyzz62 1

2S2O3 2- ---> S4O62- + 2e-
Is the 2S2O32- oxidized or reduced?

I think its oxidized... any second opinions?
thanks

2007-08-26 11:05:20 · 2 answers · asked by Anonymous

a) Fe2O3(s) + Mg(s) -> MgO(s) + Fe(s)
b) AlCl3(s) + H2O(L) -> Al(OH)3(s)+ HNO3(g)
c) NaNO3 + H2SO4(L) -> Na2SO4+ HNO3 (g)
d) NiCO3(s) + HNO3(aq) -> Ni(NO3)(aq) + CO2(g) + H2O(l)]

Can someone explain how to balance these equations?

2007-08-26 11:04:19 · 2 answers · asked by Gamer G 4

H2CO3 yeild (H^+)+(HCO3^-)

1. what is the chemical formulas of compunds?

2. what is the chemical formulas of ions?

3. what are the products of the reaction?

2007-08-26 10:56:56 · 1 answers · asked by ThePrince 2

Anyone know this? Or have a clue? Please!

2007-08-26 10:39:57 · 1 answers · asked by YouThink 1

How many neutrons are in the isotope Kr8436?

2007-08-26 10:37:08 · 3 answers · asked by 1337Haxor 2

What does it mean to find the molecular formula for Calcium Bromide? Does that just mean CaBr?

2007-08-26 10:21:34 · 4 answers · asked by k102518 2

Determine change of H knot for the combustion of phosphine (PH3).

PH3(g) + O2(g) --> P4O10(s) + H2O(g) (unbalanced)

2007-08-26 10:09:33 · 1 answers · asked by EE 2

I have chem problems here that are asking me to tell how many electrons there are in the nucleus of a given ion. Ex: How many in a chloride ion? I don't know how to do this and it just doesn't seem to be "clicking" Could someone please give me an example? Thanks!!!

2007-08-26 10:08:28 · 3 answers · asked by k102518 2

Iron metal reacts with hydrochloric acid to give H2 gas and Fe2+ ions. If 5.8 g of iron is to be dissolved in 1.5 M HCl, what is the minimum volume of the acid solution required to react wtih all of the iron?

2007-08-26 10:02:08 · 2 answers · asked by EE 2

2007-08-26 09:47:55 · 4 answers · asked by Adawg 3

Idenify each of the following as either phy or chem property:
a. It is virtually insoluble in water
b. It exists in several forms, e.g. diamond, graphite
c. It is a solid at 25 degrees celcuis and 1 atm
d. It reacts with oxygen to form carbon dioxide

THanks...

2007-08-26 09:44:31 · 2 answers · asked by MJR 2

Consider the reaction of 73.0 g of oxygen as follows:

4Fe + 3O2 2Fe2O3

How many moles of oxygen react?
How many moles of iron must react?
How many moles of product form?
What mass of product forms?

2007-08-26 09:16:08 · 1 answers · asked by Anonymous