Chemistry - November 2006

2006-11-21 13:27:03 · 7 answers · asked by reden 2

Im stuck on this one! :( can anyone help????

Giving reasons for your answers, indicate whether each of the following formulas is saturated, unsaturated, or impossible to exist.
A. C2H5 B. C4H10 C. C3H12 D. C2H2 E. CH2

2006-11-21 13:14:02 · 8 answers · asked by Anonymous

The boiling point of xenon is -107.10C. The melting point of xenon is -111.90C. What is the difference between the boiling point of xenon and the melting point of xenon?

The answer is positive right?

2006-11-21 13:05:06 · 3 answers · asked by Anonymous

consider the statement "one mole of any substance contain one mole of atoms ." using chemical formula as example , show why this statement false .

2006-11-21 12:50:00 · 3 answers · asked by henry f 2

2006-11-21 12:43:28 · 7 answers · asked by henry f 2

benzene and ethyne both have the same empirical formula of CH .if the mass of a mole of one of the compounds is 26 g, what is a possible mass of a mole other compound ?

2006-11-21 12:36:35 · 2 answers · asked by henry f 2

2006-11-21 12:35:12 · 6 answers · asked by vinod k 1

I heard this some where, It reacts with the cells and gives a instant charge. very interesting and usefull?

2006-11-21 12:31:59 · 8 answers · asked by Anonymous

Why must care be taken to have the reagents and apparatus completely dry when a Grignard reaction is performed? Support your answer with chemical equations.

Thanks in advance

2006-11-21 12:24:00 · 2 answers · asked by Dastfreadsv 2

2006-11-21 12:10:55 · 2 answers · asked by jarnagin.m@sbcglobal.net 1

2006-11-21 12:06:54 · 3 answers · asked by miMyhOn 1

2006-11-21 11:20:49 · 4 answers · asked by Science Suzie 1

2006-11-21 11:15:18 · 7 answers · asked by Anonymous

Alright, this compound is called "Ferrous Hydrogen Sulfate"

How would I write it out? I think it's F2H2(SO4)3.... but I could use some help.

2006-11-21 11:09:10 · 3 answers · asked by Lottery 1

How would u find pH of diluted HCl solution if

Volume of water used is 16,76mL
Volume of HCl added is 1.01mL
Concentration of added HCl is 1.859M
thanx for u'r help

2006-11-21 10:22:46 · 2 answers · asked by jj 2

Do you round the mass number of elements when trying to determine the number of protons and neutrons it has?

For example, Oxygen has a mass number of 15.994 ...Is it's total number of protons and neutrons 15 or 16? Thanks :D

2006-11-21 10:14:25 · 8 answers · asked by Mizzy 3

I have no idea how convert my absorbance to nmol p-nitrophenol/ml, i have my values for absorbance but how do i get it in nmol X/ml? bearing in mind the value for absorbance was 405, and i used 10mM (ml) of p-PNP

also how do obtain an initial rate of reaction? is that the same of finding the gradient on a graph

2006-11-21 10:13:22 · 2 answers · asked by may 1

2006-11-21 10:07:42 · 2 answers · asked by Ray 4

What forces in the atoms cause this?

2006-11-21 10:07:27 · 1 answers · asked by merviedz trespassers 3

i have to determine whether H-F is polar or nonpolar.......how do i know that? people say the electronegativity diffrence but how do i do that?

also whats Br-Br....nonpolar?polar?

thank u,
confused student

2006-11-21 10:02:16 · 5 answers · asked by Curious10106 2

in a polar molecule (for example H-Br) how do you indicate the direction of the resulting dipole?

i know the answer is either --> or <-- but idk HOW to get it, how do u know it points to the right? or the left?
please, and thank you a lot!

2006-11-21 09:53:46 · 2 answers · asked by Curious10106 2

2006-11-21 09:46:53 · 2 answers · asked by jai_patel91 1

I asked:

-WHY DOES AN INFLATED BALLOON MOVE WHEN THE AIR ESCAPES.

I concluded or summarized wut you guys answered:
(Newton’s Third Law of Motion), for every action there is an equal and opposite reaction i.e. the air goes one way, the balloon goes the other. The air inside the balloon is exerting pressure on the outside of the balloon. When the air escapes, that pressure is concentrated in one direction. The moving air near the opening strengthens pressure on the current of air, and so it pushes the balloon forward.


BUT, if I make a rocket out of a balloon and attack it to a straw and put the straw thru a string (so it can move on the string as if it was going to mars or wherever).. Would the rocket action still occur if there were no surronding air?

I think the air does affect it... am i wrong why?if im right .. aight? why?

2006-11-21 09:33:03 · 5 answers · asked by BeatyIsInTheEyesOfTheBeholder 1

2006-11-21 09:30:55 · 8 answers · asked by Me<3JB 2

are these right:
i.Independent Variable: Temperature ( An independent variable is what is being measured/recorded.)
ii.Dependent Variable: Time (A dependent variable is what changes in the experiment.)

2006-11-21 09:29:01 · 2 answers · asked by Me<3JB 2

And why?

2006-11-21 09:26:50 · 5 answers · asked by ♥ 6

The following reaction has Kp = 109 atm-1 at 258°C.
2 NO(g) + Br2(g) 2 NOBr(g)

If the equilibrium partial pressure of Br2 is 0.0108 atm and the equilibrium partial pressure of NOBr is 0.0717 atm, calculate the partial pressure of NO at equilibrium.

2006-11-21 09:17:30 · 1 answers · asked by smile 1

Why is it possible that are are millions of pure substance, even though there are only about 100 different elements?

2006-11-21 09:16:29 · 2 answers · asked by Anonymous

What is the molecular weight of Chromium?

2006-11-21 09:15:30 · 3 answers · asked by Ballerina 1

2006-11-21 09:02:38 · 8 answers · asked by BeatyIsInTheEyesOfTheBeholder 1