Chemistry - December 2006

2006-12-28 09:25:10 · 2 answers · asked by drfikstuf 1

2006-12-28 09:12:13 · 12 answers · asked by leazngurl 5

I need help! It's for a science project! I need a scientist...it's due at January !! I need to get good grades! Give me sites... if your in college or you're in High School and you're not soing anything...please help me!!!

2006-12-28 09:01:24 · 4 answers · asked by Anonymous

P4 + HNO3 + H2O ----> H3PO4 + NO and its a redox reaction.

2006-12-28 08:59:22 · 5 answers · asked by silver_star 1

in aqueous solution:

a) Ti (3+) is colored but Sc (3+) is not colored

and

b) Ti (2+) is a reducing agent but Ca(2+) is not a reducing agent

2006-12-28 08:48:09 · 2 answers · asked by chanti 3

I know that it measures the acidity in the water but the abbrevation ph what is it is it a name of someone or what?

2006-12-28 08:47:57 · 4 answers · asked by treval 4

I need to do a Science Project and I need help. I need a scientist!! Please help me!

2006-12-28 08:46:32 · 6 answers · asked by Anonymous

2006-12-28 08:41:49 · 3 answers · asked by STORMY K 3

account for the difference as well

2006-12-28 08:32:24 · 1 answers · asked by chanti 3

account for this difference

2006-12-28 08:29:59 · 6 answers · asked by chanti 3

1. What is the equation for the ideal gas law?
2. List what each symbol stands for.
3. What is the value of R?


For 4 and 5, show your equation (symbols only, then your work with the numbers).
4. If 2.44 moles of Helium gas has a pressure of 2.4 atm at 343 K, what volume must the gas occupy?
5. If there are 6.25 L of Hydrogen gas at a pressure of 1.95 ATM and a temperature of 243 K, how many grams of hydrogen are there? (Hint: review assignment 4.8.)

2006-12-28 08:29:16 · 5 answers · asked by Anonymous

Copper (Cu).

2006-12-28 08:28:00 · 4 answers · asked by arreis08 1

2006-12-28 08:02:10 · 8 answers · asked by trentrockport 5

2006-12-28 07:40:49 · 2 answers · asked by Students 1

2006-12-28 07:36:40 · 2 answers · asked by kavinila.anbu 1

2006-12-28 07:03:15 · 7 answers · asked by elle27 2

I have 5 queastions to ask

1. which one of the following chemical equations is balanced?
a) 2NaCl + H2SO4 ----- HCL +NaSO4
b) NH3 + H2O ---- 2NH4OH
c) KOH + H2SO4 ---- KHSO4 + H2O
d) 2Na + S ---- 2NaS

2. The molecular mass of sodium oxide (Na2O) IS
a) 22.98977.
b) 38.98917.
c) 45.97954.
d) 61.97894.

3. In electrolysis, current can flow through a liquid because ?

4. In a nuclear reaction, energy is released by the combination of 2 elements into a new element. This process is called?

5.The primary metallic element that's added to steel to make stainless steel is?

2006-12-28 06:27:08 · 8 answers · asked by keke16 1

How much heat will be released if 6.0 grams of carbon reacts with excess oxygen according to teh equation below
C(s)+O2(g)-->CO2(g) enthalpy change is -34 kilojoules
would you times 6 g of C by (1 mol of C/12 g C)= ______ mol C

_____ mol C times (-190 kJ/1 mol C)= ______kJ
is that right, if it isn't could you correct me

2006-12-28 06:12:57 · 3 answers · asked by silentcargo 3

NH3-->NO3- ---> NO2- ----> NH3

2006-12-28 06:07:00 · 4 answers · asked by cetinnovations 1

ok i like chemistry but im still bad at it because of a teacher who expects us to know the basics and teaches at an way too advanced level.
now the test is on bonding and i really cant draw the stuff like VSEPR theory and i hope i wrotte the acronym right
like lewis dot i never know if i've got it right and expecially drawing all the bonds.....can anyone explain to me in english so that a dumb person can understand how to draw this stuff and other things is shuld know related to bonding? i don't know this is the first thing thats so hard for me. i feel stupid already so if you're gonna stop by to make me feel even more stupid then dont...only if you have knowledge about chem that you are willing to share in an understandable manner

thanks in advance.

2006-12-28 05:47:08 · 3 answers · asked by Anonymous

My chemistry class assigned a report for a chemical element - what's a good one?

2006-12-28 05:12:30 · 11 answers · asked by daftholiday 1

2006-12-28 04:56:08 · 5 answers · asked by Anonymous

2006-12-28 04:09:06 · 3 answers · asked by FARMERAL 1

y study objects to the idea of treating molecular particles, such as molecules and atoms, as equal in kind to substances when discussing chemical reactions, thus confusing their different roles in the theory of matter.

The above is my abstract for this unique study, in particular. When comparing the confusion of the molecular particles with substances, it seems one would solely come to the same conclusion as I've arrived at in my abstract. What are your thoughts?

2006-12-28 04:07:15 · 3 answers · asked by Anonymous

When using a fuel cell what goes in is hydrogen and oxygen right?
What comes out is water(h2o) and electricity right?
What if you could spilt the water back into hydrogen and oxygen and repeat the cycle?
You would never need more chemicals and you would keep gettting electicity?
Would this idea work?

2006-12-28 03:59:31 · 7 answers · asked by Anonymous

2006-12-28 03:57:17 · 4 answers · asked by Anonymous

I asked earlier about an extra credit deal at my school where we have to freeze a steel pipe with chemicals and shatter it. Thanks to all who answered my question and it seems to be liquid nitrogen is the answer. I would like to experiment first because i need the credit. So my new question is where do i buy liquid nitrogen from and how much is it?

2006-12-28 03:37:47 · 7 answers · asked by ask me 1

I am a sophomore in college with an unknown major....I have been leaning towards Biology, Zoology or Conservation. I am an average student so I want to pick the one which will suit me best. I am most scared of Organic Chemistry 1 & 2 and the labs. These classes are required for all of the majors I listed. I am a committed student, but how well do you think an average student could do in these classes? Thank you

2006-12-28 03:28:58 · 12 answers · asked by Anonymous

Which of the following equations is a single replacement reaction?
C(s)+O2(g)CO2(g)
Fe(s)+H2S(g)-> FeS(s)+H2(g)
8Fe(s)+S8(s)-> 8FeS(s)
Nacl(aq)+AgNO3(aq)-> AgCl(s)+NaNO3(aq)

Which of the following equations is a double replacement reaction?
C(s)+O2(g)->CO2(g)
Fe(s)+H2S(g)-> FeS(s)+H2(g)
8Fe(s)+S8(s)->8FeS(s)
Nacl(aq)+AgNO3(aq)-> AgCl(s)+NaNO3(aq)

Balance the following equation:
NH3+O2->NO2+H2O

5,400 moles of P4010 has a mass of:

52.57 g.
1599982 g.
106965425 g.
1532412 g.

When doing a stoichiometry problem, all of the following could be used to solve the problem except:

conversion equalities.
mole ratios.
temperature.
molar masses.


Calculate the mass of 4.56 moles of helium.

15g helium
18.25g helium
7.68g helium
9.12g helium
4.003g helium


Calculate the number of atoms in 12g of zinc.

1.0 x 1024 atoms
1.1 x 1022 atoms
1.1 x 1023 atoms
0.9 x 1021 atoms
1.2 x 1023 atoms

2006-12-28 03:06:21 · 3 answers · asked by Anonymous

We have a extra credit project at my school for chemistry. We have to freeze a Steel pipe and shatter it. What is the best chemical to use?

2006-12-28 02:58:55 · 4 answers · asked by ask me 1