Chemistry - June 2007

2007-06-06 02:16:13 · 3 answers · asked by Airith19xxx 1

equation equals the number of protons on the other side of the equation. ]


A. True
B. False

2007-06-06 02:12:04 · 2 answers · asked by Mo 1

I understand that the electrical charge is stored on chemical bonds somehow but don't know the exact details.

2007-06-06 02:03:02 · 2 answers · asked by tuthutop 2

A. a small amount of energy
B. no energy
C. a large amount of energy
D. extra electrons

2007-06-06 02:00:53 · 4 answers · asked by Mo 1

2007-06-06 01:47:46 · 3 answers · asked by lady121425 1

temperature from 10oC to 50oC?


A. 1,800 J
B. 72,000 J
C. 108,000 J
D. 900,000 J

2007-06-06 01:39:48 · 4 answers · asked by Mo 1

2007-06-06 01:30:13 · 1 answers · asked by Anonymous

2007-06-06 00:38:26 · 4 answers · asked by Anonymous

Benzyl Benzoate is obtain by mixing Benzyl Alcohol and Benzoic acid, right? what are the proportion to mix them and get Benzyl Benzoate ?

2007-06-05 22:56:45 · 2 answers · asked by Anonymous

0.9g/mL.If this solution contains 30% of NH3 by weight, calculate its volume.

2007-06-05 22:16:39 · 1 answers · asked by Sarang 3

I am studying the phse diagram of NaCl-water using Differential scanning colorimetry. I often find that the system supercools and thus distorts my results. Any idea of how to avoid supercooling of NaCl-water system. The conc ranges i tried are below eutectic (5 wt%, 10 wt% and 20 wt%)

2007-06-05 21:06:22 · 1 answers · asked by csubbu 1

water and dinitrogen monoxide, sometimes called nitrous oxide. If 150 ml of nitrous oxide were collected over mercury at 42 degrees C and under a pressure of 74.5 cm of mercury, how many grams of nickel had reacted? please explain

2007-06-05 20:35:07 · 1 answers · asked by Anonymous

detectives sometimes make plaster of paris moulds of footprints.what property of solids makes the plaster mould useful in identifying the suspects shoe?

2007-06-05 20:08:17 · 1 answers · asked by Anonymous

O2 stands for oxygen molecule.

2007-06-05 18:32:27 · 4 answers · asked by Sarang 3

A. the effectiveness of the collisions, only
B. the frequency of the collisions, only
C. both the effectiveness and the frequency of the collisions
D. neither the effectiveness nor the frequency of the collisions

2007-06-05 18:27:44 · 5 answers · asked by Griizzy 3

A. C(s) + O2(g) ↔ CO2(g)
B. CaCO3(s) ↔ CaO(s) + CO2(g)
C. 2Mg(s) + O2(g) ↔ 2MgO(s)
D. 2H2(g) + O2(g) ↔ 2H2O(g)

2007-06-05 18:26:01 · 1 answers · asked by Griizzy 3

2007-06-05 18:04:03 · 1 answers · asked by Anonymous

2007-06-05 17:50:02 · 2 answers · asked by Amanda T. 1

N2H4 + N2O4 --> 3N2 + 4H2O

or the marking scheme is wrong ?

2007-06-05 17:27:36 · 2 answers · asked by livefast_dieyoung 2

2007-06-05 17:23:53 · 4 answers · asked by tibguitarbabe 1

What would happen if the anode and cathode touched the salt bridge? And what would happen if the alligator clips for a voltameter were to touch the solution?

2007-06-05 17:02:53 · 1 answers · asked by Mandy 2

where can i buy KNO3

2007-06-05 17:01:37 · 3 answers · asked by corndog 1

If Cobalt (II) Sulfate is heated too strongly this reaction occurs:
CoSO4 (s) ---> CoO(s) + SO3 (g)
If a sample of CoSO4*6H2O is heated & this reaction along with dehydration occurs,what will happen to the experimental % water?
----
I thought the % would go down b/c there will be a loss of water from cobalt sulfate (in the form of water vapor) but that is incorrect. Can someone please explain what would happen to me. I would really appreciate it! Thanks so much.

2007-06-05 16:47:59 · 2 answers · asked by Anonymous

I know there is glass inside there, but is the chemical deadly? What are the risks. This is a serious question, and no I DONT plan on drinking one.

2007-06-05 16:24:15 · 6 answers · asked by Anonymous

Required for safe use of the chemical glycol in drilling fluid industry

2007-06-05 16:18:41 · 3 answers · asked by sushanta d 1

it's a salt solution, if that helps

2007-06-05 16:06:38 · 2 answers · asked by Karen 1

If it is air, why does the air collect in the center of the cube?

2007-06-05 14:38:43 · 4 answers · asked by Anonymous

2007-06-05 14:19:05 · 5 answers · asked by blahhhhhh 2

I have been given an compound and have to determine if the Carbon and oxygens are sp, sp2, or sp3.

THANKS!

2007-06-05 13:46:01 · 3 answers · asked by Tropical Mango 2

2007-06-05 13:45:03 · 2 answers · asked by love is blind 1