Chemistry - August 2007

It is for the lab time I missed in my high school chem class.

2007-08-03 12:37:41 · 2 answers · asked by joy72202 3

2007-08-03 12:28:46 · 4 answers · asked by Marie C 2

we need to do it . some body help us ??????!!!!!!!!!!!!!!

2007-08-03 11:47:09 · 8 answers · asked by Anonymous

On a molecular level, how does decreasing the temperature affect the rate of a reaction?

A) Molecular speed increases, and more effective collisions will take place. The reaction will be faster.

B)Molecular speed increases, and fewer effective collisions will take place. The reaction will be slower.

c) Molecular speed slows, and fewer effective collisions will take place. The reaction will be slower.

d) Molecular speed slows, and more effective collisions will take place. The reaction will be faster.

2007-08-03 11:07:01 · 6 answers · asked by Anonymous

In terms of a broken-symmetry wavefunction?

2007-08-03 10:31:42 · 1 answers · asked by supastremph 6

Cl=
Ag=
Ne=
Ni=
O=
Ra=
U=
Na=
Kr=
Pb=
H=
Hg=
Fe=
Ca=
Cu=
Au=
He=
K=
Al=

2007-08-03 10:08:25 · 11 answers · asked by ♥OFFICIALLYMrs-JONES♥ 2

I just painted my daughter's room a few days ago and now wish I used Non-VOC paint. I've read even low-VOC can offgas for a very long time. Is this correct? Pls. help!

2007-08-03 06:44:46 · 2 answers · asked by lil' k 2

I was wondering if alcohol dissolved oil, and how much of it can it dissolve?

2007-08-03 06:41:58 · 4 answers · asked by teh dude v666 1

how to work out in the lab to prepare a solutin of potacium dihygen phosphate 100ml, 2mmol/L , (Molecular weigh=136g) ,pH= 7,4

2007-08-03 06:28:53 · 1 answers · asked by Patric E 1

Calculate the number of gram-moles in 12 grams of Oxygen and 22 grams of Carbon Dioxide. I'm totally confused, can you guys help me compute?

2007-08-03 05:14:29 · 1 answers · asked by Light 3

2007-08-03 02:35:11 · 1 answers · asked by Cute G 1

What is in paper that makes it so that it can be turned into charcoal, it's for a project, thanks for all you're contributions...

2007-08-02 23:57:05 · 5 answers · asked by Anonymous

What's the state of the natural gas in the large bottle or whatever you call it? Is it liquid or gas? Thx!!

2007-08-02 21:26:53 · 4 answers · asked by Anonymous

2007-08-02 21:21:33 · 3 answers · asked by surprise 1

Please explane me from the basic. & in easy language or simple words. yuors friendly.

2007-08-02 20:51:10 · 1 answers · asked by Anonymous

2007-08-02 20:35:22 · 3 answers · asked by mifp_frances 1

Which common household chemicals can I use as indicators to identify which substances as acidic/basic in nature?

2007-08-02 20:20:52 · 1 answers · asked by Anonymous

2007-08-02 16:17:21 · 5 answers · asked by Anonymous

What amount of 0.50 mol/L NaOH is required to titrate 10.0 mL of a 2.00 mol/L H2SO4 solution?
How many millliliters of commerical sulfuric acid are needed to prepare 200mL of a 3.00 Eq/L H2SO4 solution if the percent assay of the commercial reagent is 96% and its specific gravity is 1.85?
What volume of concentrated latic acid (HC3H5O3) with a specific gravity of 1.22 and a purity of 86.0% is needed to make 250mL of a 3.00 mol/L latic acid solution?
Determine the number of equivalents of H2SO4 present in 450 mL of 3.00 mol/L H2SO4 solution?

2007-08-02 14:56:16 · 2 answers · asked by prime7 2

2007-08-02 14:39:01 · 1 answers · asked by Anonymous

what would be the pressure of the gas sample?

2007-08-02 14:27:48 · 3 answers · asked by Anonymous

If a change is made in the gas temperature which causes the volume of the gas sample to become 520 ml at 1.00 atm,what is the new temperature?

2007-08-02 14:21:00 · 3 answers · asked by Anonymous

Define a calorie.

2007-08-02 12:38:53 · 11 answers · asked by tevOoOoOo 1

2007-08-02 11:03:50 · 5 answers · asked by Ayaba 1

does dry ice release cold? i know that sounds dumb. But if i were to put about 3 grams of dry ice into a glass container in the sun and cover the top with clear wrap, would the dry ice lower the temperature?

2007-08-02 09:54:27 · 5 answers · asked by Anonymous

CH3OH(l) + 3/2O2(g)----> CO2(g)+2H20(l)
Delta Hrxn= -726.4kJ/mol

C(graphite)+O2(g) ----> CO2(g)
Delta Hrxn= -393.5kJ/mol

H2(g) + 1/2O2(g)----->H2O(l)
Delta Hrxn= -285.8kJ/mol

calculate the enthalpy of formation of methanol (CH3OH) from its elements:
C(graphite)+2H2(g)+1/2O2(g)
----->CH3OH(l)

If anyone knows how to do this please explain to me step by step how to solve it. Thanks so much, i really need the help.

2007-08-02 09:34:24 · 2 answers · asked by Super24 1

2007-08-02 06:18:47 · 4 answers · asked by daniel a 1

2007-08-02 05:59:15 · 6 answers · asked by daniel a 1

2007-08-02 05:22:57 · 8 answers · asked by Anonymous

why?

2007-08-02 02:47:08 · 6 answers · asked by BigBear 2