Chemistry - September 2006

2006-09-30 14:28:20 · 5 answers · asked by curious 2

2006-09-30 13:51:05 · 6 answers · asked by almostdead 4

Does liquid hydrogen spontaneously combust?

2006-09-30 13:27:50 · 8 answers · asked by mikeyslsk 1

I want to know the calculation. Thanks.

2006-09-30 12:26:40 · 3 answers · asked by GQ 1

Okay! I'm embarrassed to ask but here it goes: I'm not sure how to round this, so I can proceed with the emp. formula. I'm thinking 2.1 or just 2; however I'm not positive. Please help!!

0.0399
--------- = 1.985074627
0.0201

2006-09-30 12:05:18 · 4 answers · asked by Trish 2

2006-09-30 11:45:07 · 6 answers · asked by rayray 2

2006-09-30 11:03:12 · 3 answers · asked by brendan 2

2006-09-30 11:02:09 · 12 answers · asked by ramchand_l 1

K4Fe(CN)6 + KMnO4 + H2SO4 -> KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2O ......... al numbers are the small numbers after the element not the big number like 3SO but like H2O....... 1 before this was incorrect

2006-09-30 10:12:03 · 5 answers · asked by Anonymous

2006-09-30 09:48:37 · 12 answers · asked by mack 1

Please provide completely balanced equations for the following chemical reactions. Please include the states of reatcants and products also. In addition, indicate the oxidizing agent in all of the applicable redox (oxidation-reduction) reactions:

1) Burning magnesium ribbon in oxygen.
2) Combustion of phosphorus.
3) Combustion of sulphur.
4) Dissolving copper in concentrated nitric acid.
5) Dissolving magnesium oxide in hydrochloric acid.
6) Dissolving calcium in water.
7) Dissolving copper (II) oxide in sulphuric acid.

2006-09-30 09:46:30 · 3 answers · asked by Karan S 1

i need to get my hands on some for a school project

2006-09-30 09:34:52 · 3 answers · asked by elhombre1892 1

1.Pure ammonia gas (NH3) contains no hydroxyl ions. However, ammonia takes on the characterictic slippery feel of a weak base in water solution because

A.the NH ion has a negative charge
B.the water- ammonia reaction produces OH-ions
C.the NH ion is positive
D.water is a strong electrolyte

2006-09-30 09:26:55 · 3 answers · asked by scienctist 1

2006-09-30 09:26:04 · 5 answers · asked by Farrukh H 1

what happens when you do it and do i have to clean it up etc.

example:baking soda and vinegar or mentos and diet coke

2006-09-30 09:25:24 · 8 answers · asked by ♣ Mr. Clover ♣ 3

2006-09-30 08:58:36 · 5 answers · asked by angeliquexelo 1

,,Because of in the placings of the other elements in the perdiodic table, if I were attempt to work them out for myself, how would I do so? How does the positioning of the elements in the periodic table assist me?

2006-09-30 08:52:23 · 4 answers · asked by angeliquexelo 1

How much heat is released when 200 grams of sodium hydroxide dissolves in water?

A.-210k J
B.210k J
C.-223k J
D.223 k J



2.With respect to the Bronsted-Lowery model of acids and bases, which statments is "false"?


A.Acids donate an electron pair
B.Water can act as a base
C.Acids donate one or more protons
D.Water can act as an acid

2006-09-30 08:43:39 · 3 answers · asked by scienctist 1

2006-09-30 08:34:11 · 9 answers · asked by angeliquexelo 1

In chemistry, in the perdioic table, what would be the atomic mass number of Mg 2+ ???

2006-09-30 08:20:55 · 8 answers · asked by angeliquexelo 1

I am interested in small-scale approaches that an individual or family could use not large-scale commercial operations.

2006-09-30 08:13:53 · 7 answers · asked by Seeker 4

For example. If you were given a table to fill in with the Particle name being Ar for Argon, the atomic number being 18 and the mass number being 40, how would you work out the number of neutrons in that particle?

2006-09-30 08:10:14 · 11 answers · asked by angeliquexelo 1

I am speaking about small-scale individual usage not industrial or commercial usage here.

2006-09-30 08:09:58 · 11 answers · asked by Seeker 4

I know I should know this answer, but it's been a long time. I'm looking for the technical answer, not the "perception" by the body.
Steam seems hotter, but is the "actual temp" higher than in the boiling water?

2006-09-30 07:53:18 · 11 answers · asked by Lake Lover 6

2006-09-30 07:50:16 · 3 answers · asked by micheleschindl 1

Fe3So4

Fe3(So4)2

Fe2(So4)3

3FeSo4

Np3O8

NF3

CH3O4

ClF

CCl2F2

HOCl

O2

CS2

N2O

SiCl4

BCl3

NBr3

I'm sorry the subscribt didn't work. All of the numbers are subscript except for on the 3 in 3FeSO4. But the 4 is subscript!!!

Thank you for your help!

2006-09-30 07:44:35 · 4 answers · asked by Rebecca 3

Counting the fuel used by farmer's tractors, the transportation of the raw materials to the distillery, the distillation process, and then on top of it, you only get 60% of the fuel mileage. It hardly seems like a solution.
What are the advantages?

2006-09-30 07:11:19 · 2 answers · asked by Whoa_Phat 4

Halogens like HCl not

2006-09-30 07:02:56 · 7 answers · asked by Anonymous

2006-09-30 06:57:20 · 6 answers · asked by t k 2

2006-09-30 06:54:35 · 3 answers · asked by Anonymous