Chemistry - April 2007

oh and if you also know hot to find this out: i need to know the change in thermal energy when 230g of water warms from 12*C to 90*C.

2007-04-12 14:20:28 · 1 answers · asked by Anonymous

Sugar
baking powder
onion juice
Cider
washing soda
Soap
orange juice
Saccharin
Common salt
vinegar

2007-04-12 13:43:29 · 3 answers · asked by iqnabeel 1

a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


c) [Co(en)2(NH3)Br] 2+


d) [Pt(NH3)Cl3] −

2007-04-12 13:37:17 · 2 answers · asked by nikkie70187 1

Hi, I am in 6th grade and I need some help on my review sheet. I have a test tomorrow, could someone help me? Please..

(NH4)2S(aq)+ZnCl2(aq)----->____+ZnS(s)
the numbers are suppose to be subscript

Al(s)+Pb(NO3)2(aq)--->_____

Ba(s)+H2O(l)--->_____

Cl 2(g)+KBr(aq)--->____

NH3(g)+02(g)---->NO(g)+H20(l)

2007-04-12 13:35:37 · 2 answers · asked by Desai 1

a. a mild oxidizing agent
b. HCl (aq) at room temperature
c. hot water
d. hot acid or hot alkali solutions
e. a mild reducing agent
f. none of the above

(The compound is benzamide.)

2007-04-12 12:59:28 · 1 answers · asked by Anonymous

Is the compound glucose organic or inorganic?

And could you explain why?

I'm at a loss on this one

2007-04-12 12:49:51 · 2 answers · asked by Invisible Pink RN 7

2007-04-12 11:29:14 · 2 answers · asked by Anonymous

2007-04-12 11:28:04 · 3 answers · asked by sakaki 1

2007-04-12 11:22:26 · 6 answers · asked by Katiecat 5

Please help, don't know how to approach this problem, but I do know it works under the principle that chemical reactions involve a change in volume. I know that PdeltaV is work done by the system against the atmosphere... and the ideal gas law might fit in somewhere...

2007-04-12 11:13:15 · 1 answers · asked by Anonymous

2007-04-12 11:00:40 · 4 answers · asked by BummedBYChemistry 1

2007-04-12 10:57:41 · 2 answers · asked by BummedBYChemistry 1

[Pt(NH3)Cl3] −

2007-04-12 10:57:32 · 1 answers · asked by Gemini 2

[Co(H2O)3Cl3]

2007-04-12 10:56:12 · 1 answers · asked by Gemini 2

[Co(H2O)4Cl2] +

2007-04-12 10:55:44 · 1 answers · asked by Gemini 2

A sample of Cd (OH)2 (s) is added to pure water and allowed to come to equilibrium at 25 degrees C. The concentration of Cd^2+ is 1.7 x 10 ^ -5 M at equilibrium. What is the value of Ksp for Cd(OH)2?

The answer is 2.0 x 10^ -14

Can someone show me how to get that answer please? Thank you so much!

2007-04-12 10:50:59 · 2 answers · asked by hitomiki 3

2007-04-12 10:41:17 · 1 answers · asked by OMM9 1

2007-04-12 10:12:06 · 1 answers · asked by Quemistri 1

According to kinetic and collision theory, which of the following would you expect to occur as a result of decreasing the temperature of a chemical reaction?

A. The length of time a collision takes will increase.
B. The rate that particles collide will increase.
C. The average kinetic energy of the particles will decrease.
D. The average space between particles will decrease.
E. The percentage of collisions with enough energy to react will decrease.

More than one answer!

2007-04-12 09:55:05 · 1 answers · asked by MEB 2

I don't see how either of them differ being that hydrofluoric acid and hydrochloric acid both contain an H+ and an F-, Cl- respectively. However, the answer that I'm reading is that HCl does not exist as an equilibrium. Little help

2007-04-12 09:44:34 · 3 answers · asked by alfonsocarnucci 2

2007-04-12 09:21:28 · 8 answers · asked by donkeypunch'em 3

2007-04-12 08:46:26 · 15 answers · asked by Steven S 1

Give examples of the two please!!

2007-04-12 08:43:07 · 2 answers · asked by Bridget 2

first to ethanal and then to ethanoic acid. Using the data calculate the change in H for the second oxidation. We were given the heat of combustion for ethanol, ethanal and ethanoic acid as -1371 kJ/mo, -1168 kJ/mol, and -876 kJ/mol respectively. Please help and I would appreciate if you outline the steps as I am extremely lost...!

2007-04-12 08:18:18 · 1 answers · asked by Anonymous

needs to be done in joules, any help is much appreciated!

Avagadro Constant, L=6.02x10^23mol^-1

2007-04-12 07:15:27 · 2 answers · asked by Anonymous

2007-04-12 07:08:04 · 4 answers · asked by ladona c 1

2007-04-12 06:52:33 · 1 answers · asked by ladona c 1

2007-04-12 06:36:09 · 1 answers · asked by ? 1

a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


c) [Co(en)2(NH3)Br] 2+


d) [Pt(NH3)Cl3] −

2007-04-12 05:38:34 · 3 answers · asked by Dd 1

2007-04-12 05:19:39 · 2 answers · asked by Anonymous