Chemistry - December 2007

a solution made by titraTING 2ml of 0.365% HCl with 198ml of pure water.what will the ph of the solution be?molecular mass of HCl is 36.5?
a.1 b.2 c.3 d.4 e.5
i got c.3 but it says that the right answer isd. 4

2007-12-23 23:52:04 · 2 answers · asked by Anonymous

I have a textbook but I don't know where i should begin to teach myself.

2007-12-23 18:29:43 · 5 answers · asked by DH 1

I don't know the equipment for light scattering, Can any one give me the details about the apparatus for the experiment? Thanks

2007-12-23 17:47:43 · 1 answers · asked by LI J 1

suggest reasonS for the much higher solubilities of ammonia and hydrogen chloride, compared to carbon dioxide. could the point tat the former two can form hydrogen bonding with water more readily be an ans? wad r the other reasons?

2007-12-23 17:42:47 · 1 answers · asked by blahhs 1

Help please in CHEMISTRY??? i'm now preparing our final recitation in our chemistry next year.. I have problems in Chemistry and I need some help... thanks and Merry Christmas and Happy New Year!!!

2007-12-23 17:30:49 · 2 answers · asked by Anonymous

I have no clue on the following:
1. tricholorofluoromethane ( I think its Trigonal Pyramidal, but im not sure)
2. sulfur dichloride
3. NH2-
4. H3O+

Also, please tell me the sites you found these answers, its help me so much!

2007-12-23 17:29:56 · 4 answers · asked by Anonymous

How does the Greenhouse effect and atmospheric radiation relate to each other? I am still trying to understand the "chemistry" aspect of the greenhouse effect, not just the simple explanation. My teacher says that the GHG effect isn't really "right" in a way (controversies) ... anyone want to explain this to me? I am confused.

2007-12-23 16:18:50 · 4 answers · asked by Anonymous

2007-12-23 15:28:52 · 3 answers · asked by Anonymous

2007-12-23 15:22:36 · 2 answers · asked by ReignInVictory 2

2007-12-23 15:14:37 · 7 answers · asked by Anonymous

Please explain your answer clearly. If any of you boiled vinegar before, explain your observations.
Also, can you write the chemical formula for vinegar
(ex. Water = H20 (the #2 is a subscript #)).

2007-12-23 12:12:16 · 3 answers · asked by rufftyroff 3

Consider the combustion of 1.56 mol of liquid
ethanol (C[2]H[5]OH) to gaseous water and car-
bon dioxide. Calculate the enthalpy change
for this reaction. The pertinent enthalpies of
formation (in kJ/mol) are
Hf H2O = -241.8
Hf CO2 = -393.5
Hf C[2]H[5]OH = -277.7
Answer in units of kJ.

2007-12-23 11:44:05 · 2 answers · asked by Anonymous

At elevated temperatures, sodium chlorate decomposes to produce sodium chloride and oxygen gas. A 0.8935 g sample of impure sodium chlorate was heated until the production of oxygen gas ceased. The oxygen gas collected over water occupied 57.2 mL at a temperature of 22°C and a pressure of 746 torr. Calculate the mass percent of NaClO3 in the original sample. (At 22°C the vapor pressure of water is 19.8 torr.)



Please explain tooo. THANKS ! :D

2007-12-23 10:13:20 · 3 answers · asked by Anonymous

2007-12-23 09:23:42 · 11 answers · asked by Firelight 2

A 2.20 sample of a compound gave 5.63 g CO[2] and 2.30 g H[2]O on combustion in air. The compound is known to contain only C, H, O.

2007-12-23 09:21:47 · 3 answers · asked by newyorkgirl 2

2007-12-23 08:41:07 · 17 answers · asked by Anonymous

i am makeing a small fire work and i would like to no the ration of copper sulfate to gunpowder. If you no anything about this you no that copper sulfate makes the fire turn green. I dont have alot of black powder but if you could tell me the ratio i should use as to not runin the powder with two
much or not enough and have a regualr fire. Pardon my spelling i am in a hurry.

2007-12-23 07:40:05 · 1 answers · asked by Anonymous

And do they both provide structure and support? I think only starch functions in structure and support, not glycogen. But I'm not 100% sure... what do you think?

2007-12-23 07:08:51 · 3 answers · asked by Anonymous

2007-12-23 06:57:14 · 6 answers · asked by skymeyer2012 1

What is the amount of mole, particle, or L for these?
30.6g H20 (water)
88g C
62g NaOH
95 mol of CO2
402g CO2..

I have sloved everyone and I believe my answers are wrong...

2007-12-23 06:15:18 · 2 answers · asked by Best Helper 4

I know that there has been great controversy over the irritating - and some claim carcinogenic - effects of Sodium Laurel Sulfate. But who (chemist, or perhaps a company) first discovered that the chemical was a great foaming agent and cleanser?

2007-12-23 05:42:20 · 2 answers · asked by tea 2

Friendzzz.........
M' interested in chemical reactions,wether they are of Acids and Bases,Acids and Metals or Acids and Alcohols or any other.Can u tell wether this is Organic or Inorganic Chemistry?????

Thanxxxxxxxxxx 4 helping.

2007-12-23 05:09:58 · 2 answers · asked by Anonymous

2007-12-23 04:21:41 · 3 answers · asked by aditya 62 1

A.Boiling point:-90 Celsius
B.445 Celsius
C.98 Celsius

The element list:
AgI
ICl
PH3

2007-12-23 04:00:18 · 3 answers · asked by Anonymous

Does it evaporate?

2007-12-23 02:44:41 · 10 answers · asked by Janelly 2

it iodoform (or) iodine with pottassiumiodide

2007-12-23 01:01:04 · 6 answers · asked by Anonymous

To prepare a solution for which you need to know the concentration accurately, you weigh out 4.2079g of sodium chloride and dissolve it in about 40cm3 of water in a beaker. You want to make this up to a final volume of 100cm3 of water, do you:
i) add water up to the 100cm3 line;
ii) transfer the solution into a measuring cylinder and add water up to the 100cm3 line;
iii) transfer the solution into a 100cm3 volumetric flask and add water to the mark;
iv) pipette 60cm3 of water into the solution.
Explain your choice.

2007-12-22 23:52:49 · 4 answers · asked by Jerome D 1

2007-12-22 23:20:21 · 1 answers · asked by Jerome D 1

2007-12-22 23:19:27 · 3 answers · asked by rock 2

What does polarize (as in plane-polarized light) mean?

What is the purpose of the polarizer?

and Why do we need to know specific rotation?

and please don't quote from a text book, i need to understand this!!!!!????

2007-12-22 22:47:14 · 2 answers · asked by Anonymous