Chemistry - August 2007

what are the types of chemical fertilisers?? and its effect to the environment and human's life?? could someone help me please...where can i find the source?
thanks

2007-08-20 02:12:13 · 3 answers · asked by n_n 1

When forming complex ions with vaious transition elements and ligands like NH3, Cl- and SCN-, OH-, i noticed something peculiar.

When i added a ligand solution and glucose to a transition element, it acted differently to when it was mixed with just the ligand. I'm not sure as to why this would be, can any one help?

2007-08-20 02:00:43 · 2 answers · asked by Anonymous

2007-08-20 01:29:46 · 2 answers · asked by yuki 1

when we must use dry ashing and when we must use wet ashing?

2007-08-20 01:26:05 · 3 answers · asked by thereddevil_mania 1

I thought the sea was a rich source of that nutrient?

2007-08-20 01:26:02 · 4 answers · asked by Anonymous

2007-08-20 01:20:18 · 4 answers · asked by bjmaxwell 1

Does anyone know of a chemical that will raise pH without affecting Alkalinity? I found an identical previous question from someone else and the answer was Borax. I tried that and for some reason, in my pool, it raises both readings 8 lbs of Borax raised the pH to 7.2 and the Alkalinity to 180.

2007-08-20 01:16:36 · 1 answers · asked by Anonymous

According to the traditional crystallography, there are 7 crystal systems that include cubic, tetragonal and orthorhombic systems. Under the 7 crystal systems, there are 14 Bravais lattices.

2007-08-20 01:06:51 · 3 answers · asked by MANGO 1

Not the changes. HELP!

2007-08-20 01:01:47 · 2 answers · asked by yello-jello 2

our teacher gave us an ***. on investigatory projects..with the use of nature products....i'm in 3rd yr. hyskuL..n we wiL deFend it on our science cLub affairs..d' objectives',materials,procedure,,effects..sidE effects..ex. how to make a shampo,lotion,etc. with d use of nature products...pls.. i need it!..thanks!!

2007-08-19 23:47:33 · 2 answers · asked by -nanie32- 1

specify both the case of cis and trans in[Co(NH3 )4en2]3+where en is ethylene diamine

2007-08-19 23:34:10 · 3 answers · asked by Anonymous

2007-08-19 23:08:00 · 3 answers · asked by tuti k 1

i really need your answers for my investigatory...my last sample of my investigatory project...kindly help me if you can..

2007-08-19 22:42:39 · 2 answers · asked by Christopher L 1

2007-08-19 22:16:53 · 2 answers · asked by Anonymous

I have been recommended RediClor, but people in Peru requested Helaxon.
Helaxon more expensive and does not last long, I've been told.
Travelling this Fri,Aug24 am. Need answer asap!
Any recommendations about internet store?
I need to stretch my money and buy best option, but good one too.
Thank you!

2007-08-19 22:00:43 · 2 answers · asked by GrandMamma 2

I need to know how much energy is released in kilojoules per mol (kJ/mol) when a Carbon-Hydroxide (C-HO) bond is formed. In actual fact im calculating how much energy is released in kJ/mol when you combust 1-pentanol. I really need to know this for my chemistry practical report.

This would probably be found in the SI data book.

2007-08-19 21:19:25 · 2 answers · asked by Anonymous

2007-08-19 21:07:29 · 2 answers · asked by joyce s 1

in chemistry we took a penny and put it into a solution of zinc and sodium chloride. it turned silver, and then we took it out and put it over a flame for about 6 seconds. i know it's not REAL gold, but how does this work??

2007-08-19 16:28:05 · 2 answers · asked by ddcb09 2

For a reaction, DH = +265 kJ and DS = +271.3 J/K. At what temperature will DG = 0.00?


a. 6.30 K
b. 102 K
c. 359 K
d. 719 K
e. 977 K

2007-08-19 16:20:42 · 1 answers · asked by Anonymous

The for the following reaction is -70.9 kJ.

SO2(g) + 1/2 O2(g) ® SO3(g)

Given DG [ SO2(g)] = -300.2 kJ/mol, calculate DG [SO3(g)].



a. - 371.1 kJ
b. - 229.3 kJ
c. - 158.4 kJ
d. + 88.2 kJ
e. + 229.3 kJ

2007-08-19 16:17:09 · 1 answers · asked by Anonymous

2007-08-19 16:08:45 · 3 answers · asked by JAMES 4

2007-08-19 15:49:51 · 7 answers · asked by Anonymous

bacteria splits every 20min for 3 days how many are there by the end of 3 day?

2007-08-19 15:13:36 · 5 answers · asked by Anonymous

if sterling silver gets tarnished and you clean it off a lot, won't the jewelry get smaller or thinner over periods of time because you're cleaning off the excess stuff which used to be pieces of the jewelry? thxx=]

2007-08-19 11:59:18 · 4 answers · asked by natalie 2

Fluorine+Ceasium.

2007-08-19 11:24:01 · 1 answers · asked by Anonymous

example: If I had a compound with 10.4% carbon, 27.8% sulfur, and 61.7% calcium. How can I find out its formula??

2007-08-19 10:34:29 · 3 answers · asked by iseeduckies 1

The name given to the reaction responsible for removal of the alpha- amino group from amino acids is which of the following

(a) decarboxylation

(b) transcarboxylation

(c) transamidation

(d) deamidation

(e) none of the above

Anybody know the answer?

Thankyou, x

2007-08-19 10:30:36 · 5 answers · asked by Anonymous

Eucalyptol contains 77.87% carbon, 11.76% hdrogen, and the rest oxygen. How can I find its formula using those percents??

2007-08-19 10:23:38 · 2 answers · asked by iseeduckies 1

2-methyl 3-pentanone
propyl ethanoate
3 hexanol
2,2-dimethylbutanol
triethylamine

2007-08-19 10:13:00 · 1 answers · asked by Anonymous

1. Complete and balance the nuclear equations for the following:

a) 2H + 2H --> 3H + ____.
b) 239Np --> β- + ___.
c) 226Ra --> α + ____.
d) 235U + 1n --> 160Sm + 3 1n + ____.
e) 22Na --> β+ + _____.

2. Balance the following equations:
a) I-(aq) + MnO4-(aq) --> I2(aq) + MnO2(aq) (basic solution)
b) IO3-(aq) + I-(aq) --> I-3(aq) (acidic solution)

2007-08-19 09:53:59 · 3 answers · asked by Anonymous