Chemistry - September 2007

2007-09-13 05:00:04 · 2 answers · asked by Kevin C 1

2007-09-13 04:45:23 · 8 answers · asked by chemist 1

actual answer, please help me, prefrably a science teacher or a science star pupil other than tht anyone hu can help

2007-09-13 04:41:29 · 2 answers · asked by Jessica H 1

a)oxygen ions
b)oxygen isotopes
c)oxygen compounds
d)oxygen shells
e)oxygen orbitals

2007-09-13 04:31:27 · 1 answers · asked by damigurl05 1

Does anyone know the formula for heptane

2007-09-13 04:28:30 · 6 answers · asked by Anonymous

2007-09-13 04:26:43 · 1 answers · asked by atomiquezero 1

a) molecules
b)isotopes
c)ions
d)radioactive
e)unstable atoms

2007-09-13 04:18:46 · 4 answers · asked by damigurl05 1

2007-09-13 04:11:49 · 2 answers · asked by Anonymous

2007-09-13 04:08:24 · 11 answers · asked by balaji 1

What is the name of Ca(BrO2)2 with any possible oxidation numbers.
p.s. it is not calcium bromite or calcium bromite(II)

2007-09-13 04:06:45 · 5 answers · asked by Anonymous

Please list the steps you took to get this answer.

2007-09-13 04:00:21 · 2 answers · asked by ny_spinner_dan 3

2007-09-13 03:57:11 · 15 answers · asked by MuffDvr 3

Write the electron configuration for each of the following ions using the noble gas core notation.

Fe^2+
p.s. it is not [Ar] 4s2 3d4 or [Ar] 4s1 3d5

Cr^3+
p.s. it is not [Ar] [Ar] 4s2 3d1

2007-09-13 03:53:01 · 2 answers · asked by Anonymous

Which of these statements about the scientific method is incorrect?
It is not a group of absolute truths.
It uses experiments that are reproducible
It is used for testing claims about the natural world.
It requires one to propose a theory and perform experiments to give results which confirm or disclaim the theory.
All of these are correct statements.

2007-09-13 03:47:30 · 3 answers · asked by jennifer 2

What is the maximum mass of hydrogen produced by the reaction of 4.73 g magnesium with 1.83 g of water?

Mg + 2H2O ---> Mg(OH)2 + H2

2007-09-13 03:46:40 · 3 answers · asked by Anonymous

thank you

2007-09-13 03:44:13 · 3 answers · asked by Anonymous

they are simple sugars and i will like to knowthe tests(chemical) for differenciating the two.

2007-09-13 03:44:06 · 5 answers · asked by adanna 1

And why the voltage increases when i take it out of the of the refrig??

2007-09-13 03:41:51 · 2 answers · asked by chickenpop 1

Which of these statements is correct?
A The amount of carbon on earth is essentially constant.
B The amount of carbon on earth fluctuates with the seasons.
C. The amount of carbon on earth is increasing due to plant and animal growth.
D. The amount of carbon on earth is decreasing due to consumption of carbon based fuels.
Both B and C are correct

i go with B cuz carbon growth and decay season

2007-09-13 03:32:55 · 5 answers · asked by phong pham 2

2007-09-13 03:27:31 · 2 answers · asked by PREETHILINGS 1

2007-09-13 03:11:22 · 3 answers · asked by Giselle 1

2007-09-12 23:59:29 · 4 answers · asked by bilinmz 1

2007-09-12 23:57:53 · 3 answers · asked by bilinmz 1

Would a bullet explode if you swallowed it? I'm guessing the sharp point will tear you up and kill you even if the bullet stays in one piece, but would the bullet go off? The metal would dissolve in the stomach acid, wouldn't it?

2007-09-12 21:44:01 · 5 answers · asked by Anonymous

Also why is H2 shown in ionic form 2H^+ (with the subscript removed) and SO4^2- . Does it matter if 2H^+ was written as H2^+ when in ionic form with the SO4^2- ?

2007-09-12 20:53:30 · 3 answers · asked by Gideon 1

The chemicals used in my lab were:
- Aluminum metal
- Potasssium Hydroxide
- Sulfuric acid


A guy I know guessed and said: The slow cool lets the molecules move faster, which increases the likelihood of bonds but the ice bath would slow them down much more, meaning there is less of a chance of bonds.


But people on Yahoo Answers said that...

"Usually things dissolve much easier in warm water. Crystals should form more rapidly in an ice bath because they are more supersaturated. Rapid moving around is not necessarily conducive to crystal formation. "

" Ice bath. Crystallization is faster lower the temperature. "

"They'll form faster under an ice bath if you think about it...crystals are essentially solids...when water freeze into ice and ice is crystal lattices this is what is occurring with other crystal formations."

2007-09-12 19:16:43 · 5 answers · asked by Anonymous

2007-09-12 19:10:18 · 2 answers · asked by amber w 1

Compare the # of atoms present in 10.0 gram samples of water and sodium chloride

also, if you can/want,

Determine the mass of O2(g) required to completely combust with 10.0g CH4(g).
[2 and 4 are subscripts]

I am brand new to Chem this year and well, im not exactly sure what to do/look for
thanks for any help!
explanations are always nice, im really not here just to "get an answer and leave," i want to be able to understand it

2007-09-12 19:02:21 · 2 answers · asked by *mouse* 3

what is the viscosity of 20 % salt solution in water?

2007-09-12 18:45:50 · 3 answers · asked by carlovski 1

Also, Calculate the number of H- in 1.127 g CaH2.


I'll appreciate any help

2007-09-12 18:39:39 · 3 answers · asked by Anonymous