Chemistry - April 2007

Which of the following have geometric isomers ?



a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


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


d) [Pt(NH3)Cl3] −

2007-04-11 10:41:17 · 2 answers · asked by Christie 1

2007-04-11 10:34:01 · 2 answers · asked by regan w 1

cm3 without a change in temperature. Find the new pressure of the gas? (new question)>Calculate the decrease in temperature when 2.00 L at 20.0 Celsius is compressed to 1.00L?

2007-04-11 10:32:19 · 2 answers · asked by poofydarling06 1

2007-04-11 10:32:15 · 1 answers · asked by regan w 1

2007-04-11 10:27:26 · 1 answers · asked by poofydarling06 1

H2O - 2 hydrogen,1 oxygen
if there is oxygen in the formula of water, why cant we breathe underwater?

2007-04-11 09:41:25 · 5 answers · asked by baseballnick211 2

is chocolate a compound?

2007-04-11 09:41:25 · 1 answers · asked by Anonymous

a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


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


d) [Pt(NH3)Cl3] −

2007-04-11 09:26:42 · 2 answers · asked by simonkf2002 1

Which of the following have geometric isomers ?



a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


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


d) [Pt(NH3)Cl3] −

2007-04-11 08:54:13 · 2 answers · asked by joe p 1

For the coordination compound [Ag(NH3)2]NO3 give the oxidation state of the transition metal followed by the the coordination number.

2007-04-11 08:53:53 · 2 answers · asked by joe p 1

what is the C - H bond enthalpy of cyclohexane and chlorobenzene? ?

could u also tell me where u find that out ? THANK YOU x x x

2007-04-11 07:37:04 · 1 answers · asked by chemistryppl 2

a. BaCl2 - Salt
b. Ca(OH)2 - Base
c. HClO4 - Acid
d. CrI6 - ?
e. HC2H3O2 - Acid

What is CrI6; an acid or a base and why?

2007-04-11 07:16:21 · 1 answers · asked by schiggatyshiggatyschwaaa 1

For the coordination compound K2[CoCl4] give the oxidation state of the transition metal followed by the the coordination number.

2007-04-11 06:08:04 · 2 answers · asked by help 1

a) How many unpaired electrons are in the d-orbital splitting diagram for the octahedral complex ion of

Co2+ high spin




b) How many unpaired electrons are in the following complex ion

Fe(CN)63-

2007-04-11 05:52:18 · 1 answers · asked by Foxychick 1

Which of the following have geometric isomers ?



a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


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


d) [Pt(NH3)Cl3] −

2007-04-11 05:49:53 · 4 answers · asked by Foxychick 1

For the coordination compound K3[Fe(CN)6] give the oxidation state of the transition metal followed by the the coordination number.


Give two answers here with ONE and ONLY ONE between your two answers.A correct answer format would have the form, for example,+4 8Note the positive or negative sign precedes the number in the oxidation state.

2007-04-11 05:48:41 · 3 answers · asked by Foxychick 1

A. Combination reaction
B. Single replacement reaction
C. decomposition reaction
D. More than one response is correct

2007-04-11 05:02:56 · 4 answers · asked by Anonymous

2007-04-11 03:54:13 · 3 answers · asked by randy_nephro 1

2007-04-11 03:52:42 · 1 answers · asked by randy_nephro 1

2007-04-11 03:23:47 · 3 answers · asked by pam r 1

2007-04-11 03:01:36 · 5 answers · asked by discrt1b 1

23592U is a naturally occurring radioisotope with a half-life of 7.1 x 108 yr. What percentage of this isotope that was present during the formation of Earth still remains? Assume that the Earth is 4.5 x 109 yr old and that no U-235 is created by decomposition of other elements.



a. 6.3%

b. 4.4%

c. 1.2%

d. 0.16%

e. 0.81%

I've worked through most of the math - k=8.76e-10
time = 4.5e9years - but how do I figure the percent remaining?

2007-04-11 01:58:56 · 3 answers · asked by Anonymous

Carbon dating can be applied to organic materials up to 5.0 x 104 years old. What percentage of the original is present in a sample after this much time? The half-life of is 5730 yr.



a. 0.24%

b. 8.7%

c. 0.0011%

d. 6%

e. 0.89%


I believe the correct answer is 0.0011% but my method definitely took toolong to be the actual method that should have been used.

2007-04-11 01:34:35 · 2 answers · asked by Anonymous

what is the amount of oxygen that would react with 2g of zinc powder at the room conditions?

RAM:Zn=65,O=16,I mole gas at room conditions=24 dm3

2007-04-11 00:35:59 · 2 answers · asked by Anonymous

2007-04-11 00:23:30 · 1 answers · asked by Anonymous

(relative atomic mass : Al,27 ; Cu,64)

please show your working.thank you.

2007-04-10 23:34:13 · 2 answers · asked by cheezywedges 1

Why and how these two elements react?
I came up with this wonder when I was told to check my lipstick for the presence of Pb-which of course would be bad. This is supposed to be detected by putting some lipstick on a finger and rubbing a gold jewel on it. If black colour is produced, then Pb exists.

2007-04-10 22:36:37 · 4 answers · asked by Lilly26 3

I was melting a piece of jewelry, and some of the metal seemed not to be silver. How would I seperate?

2007-04-10 20:36:32 · 3 answers · asked by cas1025 4

its related to chemistry?

2007-04-10 20:25:12 · 2 answers · asked by parul b 2

I measured a value of 3000 ohms for a 1 L salt water solution and a value of 150 ohms for a 1 L 5% hydrochloric acid solution.

2007-04-10 20:07:13 · 3 answers · asked by drunknmaster4 2