Chemistry - November 2006

a student collects a few leaves to find if chlorophyll a and chlorophyll b are present. what are the step wise procedure for the student to follow? what are the different type of apparatus to be used? what are the safety precautions that should be taken during the experiment? what is the principle involved in this experiment?what are the results?

2006-11-25 01:16:19 · 3 answers · asked by Anonymous

Let's say I stand on a very accurate scale and measure my weight. Next, I take a deep breath. Does my weight increase, stay the same, or decrease, and why?

2006-11-25 01:14:48 · 6 answers · asked by Horace S Patoot 3

If a bucket of warm water was thrown down a path in order to make a slide, would it freeze the slide quicker than if you poured cold water down it?

2006-11-25 01:02:41 · 12 answers · asked by mclean 3

WHY is the kelvn scale used in the chemistry gas laws (ie. Charles's, Gay-Lusacc's)

2006-11-24 23:24:04 · 10 answers · asked by yall_peeps 1

2006-11-24 22:28:49 · 10 answers · asked by Adrian M 1

2006-11-24 22:14:31 · 5 answers · asked by Soulja 1

2006-11-24 22:12:37 · 4 answers · asked by Soulja 1

2006-11-24 21:53:56 · 16 answers · asked by ben 1

An unsaturated hydrocarbon known to be either ethene or ethyne reacts with excess bromine to give a substance containing 85% bromine and 12.8% carbon by mass, the remainder being hydrogen.

2006-11-24 21:24:09 · 1 answers · asked by prashmanic 4

Like CHEMDRAW, ISISDRAW, there may be differet softwares available for organic chemistry. These must be present in the form of CD. Can one tell me their names & application part? Does DOC, Lange's handbook & Fieser reagents book present in the form of CD?

2006-11-24 21:23:17 · 1 answers · asked by Mayur D 1

how can i figure out that 10 with PH of -2.12 is 7.6E-3 M H+

2006-11-24 21:08:27 · 2 answers · asked by tanny 1

2006-11-24 20:37:04 · 5 answers · asked by Anonymous

How is this possible since Br2 is insoluble in CCl4(their forces of attraction are not compatible)?

2006-11-24 20:36:47 · 4 answers · asked by ninjatortise 2

2006-11-24 20:12:48 · 2 answers · asked by arazo l 1

2006-11-24 20:06:26 · 6 answers · asked by tutun 1

2006-11-24 18:32:43 · 2 answers · asked by Anonymous

How can a company guarantee the long-term stability of such a paint? How will a varnish such as turpentine or mineral spirits affect the paint?

2006-11-24 18:31:41 · 1 answers · asked by Anonymous

2006-11-24 17:59:23 · 6 answers · asked by Mathew V 1

At 2200°C, K = 0.000050 for the following reaction.
N2(g) + O2(g) 2 NO(g)

The gases N2 and O2 were placed in a flask at initial pressures of 0.91 and 0.25 atm, respectively. What is the value of 'x' (half of the partial pressure of NO at equilibrium)?

2006-11-24 17:59:12 · 2 answers · asked by tanny 1

Ive always been told that if something can go to one extreme it can go to the other....i just find it hard to know that you can boil everything....(ie you can freeze a piece of wood but can you bring a piece of wood to a boiling point?)

2006-11-24 17:54:09 · 9 answers · asked by Anonymous

There are many things to do with a Microwave..
such as:

putting a CD into the microwave. it makes cool laser lights..

cutting a grape in half, squeezing it a little and then putting it into the microwave.. it creates fire..

filling a cup halfway with milk, then putting a light blub into it, the lightbulb lights up..

-----
do you know any other "fun" or "cool" things to do with a microwave?
will it break or damage the microwave?
is it dangerous?

i'm just curious.

2006-11-24 17:33:54 · 5 answers · asked by Anonymous 3

i have read 2 whole books on it but i dont get it. i kno its a theory that explains how electrons move and that one electron moves so fast thats it's like everywhere in its energy level at the same time... but please help me. i have a test monday

2006-11-24 17:27:30 · 2 answers · asked by Love Exists? 6

Our Chemistry teacher is pretty strict.So any one who knows these formulas Please HELP.

2006-11-24 17:05:42 · 2 answers · asked by skywalker 2

2006-11-24 16:26:36 · 8 answers · asked by jitendralovesadhana 1

2006-11-24 16:15:48 · 3 answers · asked by Nikki 1

i have to find a decent website.... thanx

2006-11-24 16:12:39 · 1 answers · asked by dJinnx of fire 1

If it's converted to liquid, solid, gas - does the actual size of molecule change?

2006-11-24 15:27:57 · 6 answers · asked by gogogo 3

2006-11-24 15:16:54 · 3 answers · asked by asianchoc 1

please can u tell explain in detail

2006-11-24 15:12:34 · 3 answers · asked by enas 1

My PH Level before boiling was 8.57 now it's 9.33. I need to know how this happened. I only have untill Sunday for the answer. Any help would be great thanks!

2006-11-24 14:43:50 · 5 answers · asked by StarsInMyEyes 1