Chemistry - February 2007

I've looked everywhere and can't find it. I'm basically looking for the constant Kf, for use in a freezing depression problem. Thanks!

2007-02-07 11:53:52 · 2 answers · asked by Wael K 2

2007-02-07 11:47:07 · 2 answers · asked by Lauren T 1

I'm trying to find out how salt melts ice. I know it has a lower melting point. So does that mean when you mix it with the the ice, because of its lower melting point, it melts the water? Please include any links, if you find some good ones.

2007-02-07 11:45:38 · 4 answers · asked by Anonymous

2007-02-07 11:45:30 · 6 answers · asked by kachilous_2002 1

Inside a flash bulbbare the two reactants necesary for a violent reaction that produces the lights. why do they not react? In terms of the collison theory how is the reaction made to occur?

2007-02-07 11:37:49 · 2 answers · asked by Anonymous

does anybody know why the following elements have the symbols that they do?
Sodium
Iron
Mercury
Tungsten
Potassium
Silver
Copper
Animony
Gold

2007-02-07 11:35:48 · 8 answers · asked by badtripdolphin 1

i have to have an atomic diagram of the chlorine atom but i dont know what it is.!!

2007-02-07 11:35:13 · 2 answers · asked by Anonymous

2007-02-07 11:34:56 · 1 answers · asked by MELLY g 1

2007-02-07 11:32:31 · 2 answers · asked by strawberry 7 2

Moley is a mole who enjoys guacamole. To make lots of guacamole, moley sets out to buy some avocados. He is going to buy 1.3 moles of avocados. How many avocados is that?

Answer: 1.3 miles * 6.02*10^23 (avogadro's number)
=7.83*10^23 Avocado's

Alright this was just introduction. Now comes the fun part!

a)If each avocado has a density of 0.89 grams per cm^3, and each avocado has a mass of 118 grams, how much volume in cm^3 does Moley's collection of avocados consume?

b)If moley puts all his guacamole in to a hemispherical bowl, how big will the radius of his bowl need to be to fit all the guacamole in it (assume the guacamole's total volume is the same as the volume of the avacados).

c) If Moley's avocados are 8.7 cm long and the avocados were stacked end on end, how many times would the stack of avocado's stretch from the Earth to the sun? (Distance from the eart to the sun is 93 million miles; 1 cm = 0.00001KM and .621 miles = 1 Kilometer)

2007-02-07 11:32:08 · 1 answers · asked by Abdul S 3

2007-02-07 11:31:31 · 2 answers · asked by Anonymous

what does gold atomic structer look like

2007-02-07 11:29:57 · 2 answers · asked by commadoorpuddles2 1

Hydrogen peroxide decomposes into water and oxygen. When a 1g. lump of MnO2 is added to hydrogen peroxide the decomposition is faster and 1g. of MnO2 is still left afterwards. Explain.

2007-02-07 11:25:34 · 3 answers · asked by Anonymous

this was a question on my home work for science, i wasnt quite sure what it meant, but its supposed to have fun with the elements.

2007-02-07 11:24:53 · 1 answers · asked by harrymw 1

2007-02-07 11:19:45 · 8 answers · asked by andrew 3

Hydrogen peroxide decomposes into water and oxygen. When a 1g. lump of MnO2 is added to hydrogen peroxide the decomposition is faster and 1g. of MnO2 is still left afterwards. Explain.

2007-02-07 11:19:11 · 2 answers · asked by Anonymous

2007-02-07 11:18:43 · 5 answers · asked by andrew 3

2007-02-07 11:18:01 · 4 answers · asked by andrew 3

Does anyone know the answer to this question...It would help me tons..thanks

2007-02-07 11:14:57 · 3 answers · asked by Anonymous

2007-02-07 11:14:24 · 5 answers · asked by HOEMYJIZM. 2

2007-02-07 11:11:54 · 1 answers · asked by belivers03 1

2007-02-07 11:06:44 · 5 answers · asked by andrew 3

2007-02-07 11:05:47 · 4 answers · asked by andrew 3

2007-02-07 11:05:02 · 6 answers · asked by mystified 1

Can someone tell me what the differences are in the structural formula of sodium peroxoborate and the structural formula of perchloric acid?

2007-02-07 11:04:29 · 1 answers · asked by Anonymous

what does golds Atomic mass look like

2007-02-07 10:51:31 · 1 answers · asked by commadoorpuddles2 1

i think its covalent, but im not sure...

2007-02-07 10:30:34 · 3 answers · asked by J J 3

2007-02-07 10:23:05 · 3 answers · asked by edward852423 2

The reaction 2A+B => C+2D has the following mechanism.
Step 1. A+B=> C+E
Step 2. A+E=>2D
If step 1 has a very high Activation Energy which is the rate determing step? step 1

Will an increase in temperature necessarily make the overrall reaction faster? explain

2007-02-07 10:22:12 · 2 answers · asked by Anonymous

2007-02-07 10:20:11 · 2 answers · asked by kachilous_2002 1