Chemistry - September 2007

please help in any way you can.

2007-09-15 14:00:44 · 2 answers · asked by Elvis P 1

What household products have either silicon, arsenic, or germanium in them please??

Thank you :)

2007-09-15 13:57:33 · 3 answers · asked by Anonymous

Would precipitation occur when 500ml of a 0.02M solution of AgNO3 is mixed with 500ml of 0.001 M solution of NaCl if the Ksp of AgCl = 1.8x10^-10 ?

2007-09-15 13:49:40 · 1 answers · asked by Ben F 1

For the positive ions in the list, predict the formula of the simplest compound formed between each positive ion and the oxide ion.
ex: Fe3+

2007-09-15 13:49:14 · 1 answers · asked by monie20032007 2

2007-09-15 13:40:32 · 4 answers · asked by Hitman44 1

Mg reacts with N forming an Ionic compound with a sample of 4.8 x 10 to the 22nd Mg ions. How many nitride ions are in the compound?


I said 2.4 x 10 to the 22nd because there would be half as many?

2007-09-15 13:37:22 · 1 answers · asked by mikala m 2

what are the products of this reaction?

2007-09-15 13:32:53 · 2 answers · asked by Anonymous

How many grams of carbon (C) contain the same number of atoms as 40 g of neon (Ne)?


easy 10 points!!

2007-09-15 13:26:41 · 4 answers · asked by Anonymous

2007-09-15 13:04:21 · 1 answers · asked by Will R 1

dryness, could you determine the amounts of NaCl, Fe,and Sio2 originally present? why or why not?

2007-09-15 13:03:40 · 1 answers · asked by shery 1

2007-09-15 12:54:57 · 1 answers · asked by shery 1

what's the opposite of acid? No dumb answers please!

2007-09-15 12:40:09 · 14 answers · asked by Anonymous

The atomic weight of carbon (C) is 12.01 amu. How many carbon atoms are contained in 42.6 g of carbon?

2007-09-15 12:28:40 · 3 answers · asked by Anonymous

I have a few questions about carbon 14.

1. How does it decay and establish a small constant level in the atmosphere?

2. How does that level establish in plants?

3. How does this level esablish in animals?

4. How is carbon-14 significant in death?

5. How can a geiger counter be used to age an artifact?

If you could answer these it is much appreciated. Thank-you!!!

2007-09-15 12:13:46 · 1 answers · asked by greenpink413 2

a. 9
b. 10
c. 12
d. 15

2007-09-15 12:01:57 · 4 answers · asked by Anonymous

2007-09-15 12:01:26 · 1 answers · asked by Gloria S 1

Please give me as much on how you got your answer as possible.

2007-09-15 11:47:16 · 3 answers · asked by Elvis P 1

We did a lab where we had to remove soap from water... We tested with different substances. We had to put plaster of paris, borax, epsom salt, and sugar into 4 seperate test tubes filled with a soapy water mixture. By shaking the test tube, soap suds would arise, and we were to measure them. Then we compared with a plain test tube filled with just soapy water. The plaster of paris removed the most soap from the water!

Now we have questions to answer and i am really confused with this one:

What criteria did you use to determine if your experiment worked?

Does anybody have a clue? PLEASE? =[

2007-09-15 11:40:24 · 2 answers · asked by addisyn 2

2007-09-15 11:11:38 · 11 answers · asked by donjamste 1

2007-09-15 10:43:52 · 4 answers · asked by Anonymous

How does the volums of a gas relate to the composition of an unknown?? im so lost.....

2007-09-15 10:39:48 · 1 answers · asked by diamond 3

NaBr + Ca(NO3)2 ---->?
NaBr + AgNO3 ---->?
NaBr + AgNO3 + NH3 ---> ?
NaBr + AgNO3 + Na2S2O3 ---> ?
NaBr + C6H10O5 + NaOCl----->?

I'd really appreciate if you can complete the equations and help me with the observations. I have a test on monday and its suppose to be the hardest test of the year. I'll fail if i dont get this information.

2007-09-15 10:34:20 · 2 answers · asked by ndnchemidiot 1

Alkanes are hydrocarbons, which means they contain only hydrogen and carbon atoms in their bonding. Now, the electronegativity difference between the C-C bonds and the C-H bonds is very small. This would make the electrons between the atoms loosely held and thus weaker bonds, right? So because these bonds are weak, wouldn't that make the molecule reactive because the bonds are easier to break??

2007-09-15 09:31:44 · 2 answers · asked by Anonymous

a. Cr^+3
b. P^-3
c. Li^+1
d. Ca^+2
e. Cl^-1
f. O^-2

What exactly am I looking for here? Just please explain what I'm looking for so I can find the answers.

2007-09-15 09:10:18 · 4 answers · asked by Average Joes 4

choose the correct word to fit into the sentence...

1. most of an atom is made up of...
empty space / electrons

2. most of the mass of an atom is due to the...
nucleus / electrons

3. all the atoms of an element are...
the same / different

4. to find out what element an atom is from, you look at the number of...
protons / neutrons


thanks if you can help =)

2007-09-15 09:07:09 · 2 answers · asked by LAURaaa 1

i need help finding out the scientific notation for the number .00830 thank you

2007-09-15 08:47:37 · 3 answers · asked by Tweety P 1

6)Which of the following are true statements ?

a) The density of an substance is a chemical property

b) The thermal conductivity of a substance is a physical property

c) Saying argon is an inert gas describes a chemical property of this gas

d) Burning wood is an example of a chemical change

e) The melting temperature of an element is a physical property





7) A compound contains 70.8 percent silver. How many moles of silver does a 62.1 g sample contain ?

2007-09-15 06:40:32 · 4 answers · asked by matt b 1

2007-09-15 06:12:50 · 7 answers · asked by divya sundar 1

2. the hydrochloric acid bottles left out in the laboratory, with time, become covered with white powder. Suggest a possible composition for this powder. Why do the ammonia bottles become less covered than do the HCl bottles?

2007-09-15 04:19:20 · 1 answers · asked by blub 1

1. why can a gas be compressed into a smaller volume?

2. why can you not squeeze a liquid into a smaller volume?

3. why can you not stir a solid?

4. what makes a gas exert pressure?

5. why does a gas completly fill its container?

6. why does a solid expand when it is heated?

any help would be great!

thank u!

2007-09-15 03:43:07 · 11 answers · asked by Anne Nonny Mouse 4