Chemistry - March 2007

2007-03-08 11:20:11 · 2 answers · asked by Graycie 2

2007-03-08 11:19:12 · 1 answers · asked by Keith 1

I need it for my science fair

2007-03-08 11:18:22 · 5 answers · asked by burninhotboi 2

How many grams of sulfur (S8) would have to be dissolved in 105.0 g of carbon tetrachloride to lower the freezing point by 1.70 degrees celsius?

kf = 29.8 K-kg/mol for CCl4

i cant find an example in the text

2007-03-08 11:03:21 · 2 answers · asked by giggles9783 1

please find where you found your information i need website

please & Thank you

2007-03-08 11:01:04 · 1 answers · asked by amber1320012000 1

2007-03-08 10:58:44 · 8 answers · asked by joyce t 1

and how can a liquid or solid have a vapor pressure???

2007-03-08 10:56:45 · 1 answers · asked by Tracey Lee ♥ 2

i need this very a science projection so if you know plzzzzzzzz tell cuz im totally confused and i have no clue thxsssssssss

2007-03-08 10:52:14 · 3 answers · asked by 2hot4u 2

How does knowing the molar heat of solution of certain compounds help in the real world?
What is a real world situation in which knowing the molar heat of solution can be useful? If you can't answer that, what is a real world situation that may relate to molar heat of solution?

2007-03-08 10:48:43 · 1 answers · asked by Anonymous

If 13.30 grams of LiCl are dissolved in water to make a solution of 0.104 L, the density is found to be 1.094 g/cm3. Calculate the molality of the solute.

2007-03-08 10:46:00 · 2 answers · asked by geebgeebgeeb 1

Disulfur dichloride, S2Cl2, can be made by treating molten sulfur with chlorine gas, according to the following unbalanced equation:
S8(l) + Cl2(g) ® S2Cl2(g)
How much S2Cl2 (in grams) can be produced if you start with 38.10 grams of sulfur, and 84.87 grams of chlorine gas?

2007-03-08 10:40:47 · 2 answers · asked by Anonymous

how do you tell the difference between a single replacement and a double replacement in chemistry?

2007-03-08 10:34:14 · 1 answers · asked by notor1ousostrich 1

phosphorus + oxygen --->disphosphorus pentoxide

2007-03-08 10:32:47 · 1 answers · asked by Lore 1

CaF2 ; 1.70mg/ 100 mL


SrC2O4 ; 1.58 * 10^-7 mol/L

Can't figure out how to do these! Help please!

2007-03-08 10:13:40 · 1 answers · asked by Chelsea H 1

2007-03-08 10:06:41 · 3 answers · asked by Anonymous

Please have two sentences or more and fast.

2007-03-08 09:54:11 · 2 answers · asked by Anonymous

My calculations say I need a 5 molar solution of hydrochloric acid for my planning investigation homework.

Is that too concentrated to use in a school lab?

2007-03-08 09:53:05 · 8 answers · asked by Anonymus 2

2007-03-08 09:35:42 · 2 answers · asked by sabrina 3

2007-03-08 09:35:15 · 1 answers · asked by aznbrother123 1

2007-03-08 09:20:41 · 4 answers · asked by Gabe 1

...carpet cleaner, clorox, mr. clean, etc?

2007-03-08 09:18:23 · 3 answers · asked by sxe_afi_fallchild 1

what is the importance of glass and what are the different domines where it occurs and how it can help us to deal with our life?

2007-03-08 09:17:09 · 4 answers · asked by melk l 1

Can a color block comparison be used effectively to estimate the pH of copper (II) sulfate?

My answer is yes...but I am beginning to doubt myself :(

2007-03-08 09:09:45 · 1 answers · asked by calculusgirl1979 2

10 mg of a certain protein was dissolved in water to make a solution of 1.00 mL at 27C. If the osmotic pressure is 1.35 torr, what is the molecular mass of the protein?

2007-03-08 09:07:03 · 2 answers · asked by Anonymous

In the reaction below, 6.89 atm each of Br2 and I2 were placed into a 1.00 L flask and allowed to react:
Br2(g) + I2(g) <=> 2 IBr(g)
Given that Kc = 74.0, calculate the equilibrium pressure of Br2.

The correct answer is 1.30.

How the hell are they getting that?!

I figured the equation is like this:

X^2/(6.89-X)^2 = 74

2007-03-08 09:05:53 · 1 answers · asked by other_user 2

2007-03-08 09:04:59 · 1 answers · asked by Anonymous

neon signs do not always contain neon gas. the various colored lights produced by the signs are due to emission of a variety of low-pressure gases in different tubes, what are other kinds of gases used in neon signs and what are the colors that they emit?

2007-03-08 08:41:13 · 3 answers · asked by WhiSp3r 2

A. NH3
B. NH4HO3
C. NaCl
D. CsI
E. NaNO3

2007-03-08 08:39:40 · 4 answers · asked by Anonymous

Which of the following compounds exhibit ionic bonding?

A. SiH4
B. Cl2
C. CaCl2
D. CH3OH
E. NaCl

2007-03-08 08:38:04 · 3 answers · asked by Anonymous

What is the difference between 24 karat and 14 karat gold (express this in chemistry terms)

2007-03-08 08:26:23 · 1 answers · asked by Anonymous