Chemistry - December 2007

An excess of AgNO3 reacts with 115.5 mL of an AlCl3 solution to give .215g of AgCl. What is the concentration in moles per liter of the AlCl3 solution?

AlCl3 + 3AgNO3 -> 3AgCl + Al(NO3)3

2007-12-01 12:46:14 · 4 answers · asked by beatrix 1

Cu: s1 d10
Ti2+: s2 d10
Bi2+: s2 d10 p1
Sb5+: d10
Pt: d10

2007-12-01 12:34:43 · 2 answers · asked by jmj2345 1

im not sure how to do this i know celsius to kelvin not not fahrenheit to kelvin

2007-12-01 12:29:38 · 3 answers · asked by Anonymous

2007-12-01 12:28:35 · 2 answers · asked by Anonymous

2007-12-01 12:21:10 · 6 answers · asked by trmb12 2

Ca and Be
Na and Na+
P- and S2-
H adn He
Cu+ and Zn2+

2007-12-01 12:21:01 · 1 answers · asked by jmj2345 1

What would the Bohr diagram look like of W, Ho and Bh...

2007-12-01 11:58:59 · 1 answers · asked by summergrl28 1

1st shell – 2 electrons
2nd shell – 8 electrons
3rd shell – 8 electrons
4th shell – 18 electrons


but gold has 79 electrons. what do i do?

2007-12-01 11:58:36 · 2 answers · asked by Anonymous

Physcial Science Help!?
Please help me on the following. I already did it, but I want to check. Just predict the chemical reaction as an equation.

1.) Magnesium Bromide + Chlorine (Anionic Single Replacement)

2.) Aluminum + Iron (III) Oxide (Cationic Single Replacement)

3.) Silver Nitrate + Zinc Chloride (Double Replacement)

4.) Hydrogen Peroxide (Decomposition)

5.) Zinc + Hydrochloric Acid (Cationic Single Replacement)

6.) Sulfuric Acid + Sodium Hydroxide (Double Replacement)

7.) Sodium Hydrogen (Synthesis)

8.) Acetic Acid + Copper (Cationic Single Replacement)

I know these might take a while, but I need help. I think I did some wrong.

2007-12-01 11:50:17 · 3 answers · asked by llppoo333 1

I dont see what the difference is and lab glasses are so ugly really could I just pick up some dewalts or okleys meant for construction workers? Same thing right?

2007-12-01 11:31:51 · 13 answers · asked by Anonymous

1. involves reduction, which is a loss of electrons.

2. converts chemical energy to electrical energy

3. converts electrical energy to chemical energy

4. involves electrolysis reactions which always produce a gas at at least one electrode.

5. involves oxidation, which is a gain of electrons.



Another question::
A copper wire dipped in a solution containing Ag(CN)2^- ions acquires a silver coating because:

1. Ag+ oxidizes Cu to Cu^2+ in a spontaneous process until silver metal completely covers the Cu.

2. Cu^2+ is stronger ox agent tahn Ag^+

3. H^+ reduced by Cu to H2, & Ag^+ ions are reduced by H2 to metallic silver.

4. Ag is a stronger reducing agent than Cu.

2007-12-01 10:58:24 · 2 answers · asked by LovelyLady 3

I have:
hydrogen .5atm
iodine 1atm
hydrogen iodide 5.2 atm
in a 1 Liter container at 273 degrees K

I need to find the equilibrium constant:
in order to do that..i have to find the number of moles of each gas, but i'm not sure how to do that...using PV=nrT on each gas doesnt seem to give the right answer because 1 liter is my COMBINED volume ..not the volume of each gas...HELP!

How do i find the moles of each gas so that i can plug it into the formula for the constant?

2007-12-01 10:15:21 · 1 answers · asked by mikala m 2

A)Calculate the specific heat capicity of diamond
B)calculate the molar heat capicity of diamond

thanks

2007-12-01 10:06:51 · 1 answers · asked by okuein 1

why do we use an air condenser, instead of a water condenser, when distilling solutions with high boiling points???

2007-12-01 10:05:32 · 1 answers · asked by bbb 2

2007-12-01 09:50:13 · 2 answers · asked by sweetgirl78228 2

Scientists believe that, when earth first formed, its atmosphere contained no oxygen at all. Today;, oxygen makes up about 21% of the atmosphere. What could have caused this change??? PLEASE GIVE CiTE SOURCES!!!! NEEDED!!

2007-12-01 09:50:03 · 2 answers · asked by Anonymous

i need to have one specific and supportable opinion that addresses the concept of "the greatest impact chemistry has on our lives is..",

2007-12-01 09:27:47 · 3 answers · asked by asdfasdffdas 1

What is the mass, volume, and energy of a photon?
What are some high energy waves? and low?
Does going from a higher energy level to lower energy level release or absorb energy?
How do quantum leaps relate to wavelengths?
Whats the difference between the speed of light, wavelenghs and spectra of the sun and a mercury vapor lamp

2007-12-01 09:01:16 · 1 answers · asked by s a 1

without scales??

*for grain*

2007-12-01 08:55:03 · 13 answers · asked by Anonymous

If 35 ml of 1X TAE is needed to prep a gel and another 200 ml of TAE is needed as a running buffer how much 50X TAE is needed

2007-12-01 08:47:32 · 1 answers · asked by aifan8703 1

The question is:
How many molecules of N2(g) remain in an ultra high vacuum chamber of 3.45 m^3 (cube) volume when the pressure is reduced to 6.67 * 10^-7 Pascals at 25 degrees celsius?

Book says 5.59 x 10^14 moles of N2.
I got something a lot smaller. Something to like
X*10^-8

Can anyone please help?

2007-12-01 08:38:06 · 3 answers · asked by Anonymous

2007-12-01 08:35:53 · 2 answers · asked by Che L 1

Which of the following molecules are non-polar because all bonds were non-polar?

H2, O2, N2, Cl2, H2O, Ch4, NH3, HF, CO2, H2S, H2O2, C2H2, CH3F, CH3OH, CCl4, OF2, HCN


all the numbers there are suppose to be smaller and in the bottom right side of the letter. Subscript

2007-12-01 08:35:10 · 1 answers · asked by answers please 3

I'm being asked to outline the structure with reference to the 'fundamental particles' in each of these elements, and give electronic structure in terms of s, p and d notation??

Here are the 3 elements: Sodium, Fluorine, and Vanadium.
For Vanadium I wrote 'As it's a D block element it holds 5 orbitals in it's sub-level, and can hold a maximum of 10 on each one'

Ma teacher doesnt understand where im gettin this from.. any help?
Give me info. on sub-levels, S,P + D blocks.. and anything else that's appropriate for this question.

2007-12-01 08:34:06 · 3 answers · asked by Anonymous

Name two types of substances that do not contain covalent bonds.

2007-12-01 08:31:03 · 2 answers · asked by answers please 3

How many bonds do each of the following atoms usually make? What rule usually determines the nuber of bonds?

H, O, C, N, Cl, F, S

2007-12-01 08:27:16 · 1 answers · asked by answers please 3

2007-12-01 07:58:08 · 1 answers · asked by Anonymous

how do you isolate pure elements
group 1 alkali metals and group 2 alkaline earth metals

2007-12-01 07:57:52 · 1 answers · asked by Anonymous

2 metals form metallic bonds. A metal and a nonmetal forms an ionic bond. 2 nonmetals form covalent bonds. How do metalloids bond with metals, nonmetals, and other metalloids.

2007-12-01 07:57:50 · 1 answers · asked by Anonymous

I need to know why mass % or weight % is more commonly used on commercial products than is molarity?

Not really sure why at all, other than maybe people don't remember what the heck molarity is.

Anyway, and chemistry-related answers would really be appreciated. Thanks! (+10 for best answer)

2007-12-01 07:46:43 · 2 answers · asked by Anonymous