Chemistry - March 2007

could someone please tell me the density of 1 bromo 2 nitro benzene???

2007-03-23 08:43:23 · 3 answers · asked by bankofgranite350 1

2007-03-23 08:20:56 · 2 answers · asked by Storm 1

before BaSO4 begins to precipitate ?

2007-03-23 08:20:08 · 1 answers · asked by Dd 1

Is the dicyclohexyl ether from by carbocation reaction?

2007-03-23 08:11:00 · 1 answers · asked by Anonymous

(CONTINUED) CCL4

2007-03-23 07:57:00 · 7 answers · asked by asphenry 1

I saw someone else ask this question and I cant understand why it was answered as being polar (although I dont doubt it!). The electonegativities of Nitrogen and chlorine are both 3.0. Why would this structure become polar? I am assuming that the 3 Cl atoms are bonded through 3 bonds to the nitrogen.

2007-03-23 07:30:10 · 2 answers · asked by Anonymous

2007-03-23 07:09:55 · 6 answers · asked by fortmyers78 1

When 0.130 g of Fe is added to 125.0 mL of 0.683 M HCl, the metal reacts to make FeCl3(aq) and H2 gas.
Assuming constant volume, what is the molarity of FeCl3(aq) (unit = mol/L)?

Fe3+ ions? (unit = mol/L
Cl- ions? (unit = mol/L)

2007-03-23 07:09:47 · 1 answers · asked by kris h 1

1. HCl
2.C2H6
3.RCH2CHO
4.RCH2NCH2

2007-03-23 07:01:45 · 4 answers · asked by PNS 1

To prepare a stock solution of 0.249 M HCl solution, you would have to add of water if you started with 400.00 mL of 2.58 M of HCl.
(Remember units)

2007-03-23 07:00:27 · 2 answers · asked by kris h 1

2007-03-23 06:56:42 · 3 answers · asked by leroy b 1

And also how? This is a question from Chemistry

2007-03-23 06:50:20 · 1 answers · asked by PNS 1

I love chemistry, biology, and math, so this sounded good.

2007-03-23 06:19:09 · 1 answers · asked by acbstu 1

a) the ionization energies level off after the second electron is removed
b) the ionization energies increase dramatically after the second electron has been removed
c) the ionization energies continue to increase a relatively steady amount with each electron removed
d) the ionization energies drop after the second electron is removed

2007-03-23 06:18:46 · 1 answers · asked by Anonymous

a) the cation is smaller
b) the cation is larger
c) the cation and atom are the same size
d) the size of the cation is impossible to predict

2007-03-23 06:11:16 · 1 answers · asked by chemrob3 1

Calculate the molarity of a solution prepared by dissolving 12.5 g of HCl in enough water to make 2.50 L of solution.

2007-03-23 05:40:41 · 2 answers · asked by kris h 1

2007-03-23 05:28:59 · 5 answers · asked by dave n kez 4

I need some help on the following question (I have searched in many books and over the internet to no avail):

During electrolysis of molten aluminium chloride, the carbon anodes are burned away. Explain why this should happen and write balanced chemical equations for the reactions that take place.

10 Points for the Best Answer.

2007-03-23 05:18:54 · 3 answers · asked by Toni 4

2007-03-23 05:13:47 · 2 answers · asked by hqt5009 2

How many moles of NaCl would be added to 350.0 mL to make up a 0.420 M NaCl solution

2007-03-23 04:56:42 · 1 answers · asked by kris h 1

Hi folks I have two chemistry questions that I don't quite understand many somebody here can help me. They are as following:
1) zinc metal is placed into a solution containing silver ion, Ag^+?

2) gold metal is placed into a solution containing zinc ion, Zn^2+?

What would happen or what type of reaction? Please I need help understanding!!!!!!

2007-03-23 04:52:18 · 4 answers · asked by ls1gun 1

2007-03-23 04:46:02 · 11 answers · asked by ladylover1316 1

2007-03-23 04:44:45 · 5 answers · asked by --Lost in this world-- 3

I would appreciate your unique working style to resolve this problem.
------------------------------------------------------
The acid-dissociation constant at 25.0 °C for hypochlorous acid (HClO) is 3.0 × 10-8. At equilibrium, the molarity of H3O+ in a 0.010 M solution of HClO is __________.

a. 1.7 × 10-5
b. 0.010
c. 5.8 × 10-10
d. 4.76
e. 2.00

2007-03-23 04:18:06 · 2 answers · asked by Anonymous

2007-03-23 04:00:57 · 8 answers · asked by marie 1

1. Convert 2.60 atm to torr
19.76 torr
1976 torr
12.66 torr
1.97 torr
179

2. Which of the following describes temperature?
the attractive force among molecules in a substance
the average kinetic energy of the particles in a substance
the heat of a substance
the sublimation of a solid at high temperature

3. 2H2O2 > 2H20 + O2
In the decomposition equation above, how many grams of oxygen is made when 15.0 grams of H2O2 decomposes?
7.06 g
6.65 g
8160 g
3.10 g

2007-03-23 03:51:52 · 3 answers · asked by sol 2

2007-03-23 03:15:09 · 0 answers · asked by Anonymous

2007-03-23 03:08:39 · 2 answers · asked by Cait 1

pact bop that has a hydrogen peroxide diluated solution

2007-03-23 03:06:15 · 1 answers · asked by Hally berry 3

Using the value of Ksp for Ag2S, Ka1 and Ka2 for H2s, and Kf=1.1x10 to the fifth for AgCl2, calculate the equilibrium constant for the following reaction:

Ag2S+4Cl+2H<-----> 2 AgCl2+H2S

Can anyone help me with this?

2007-03-23 02:57:43 · 2 answers · asked by dancelover90 2