Chemistry - June 2007

2007-06-25 10:24:14 · 4 answers · asked by Anonymous

2007-06-25 10:18:37 · 10 answers · asked by BabyCgurl123 1

2007-06-25 10:14:18 · 10 answers · asked by BabyCgurl123 1

2007-06-25 10:05:09 · 5 answers · asked by BabyCgurl123 1

I got really stuck with this can someone help, i am rotton at maths

2007-06-25 09:51:52 · 4 answers · asked by pud 1

I am kinda confused about this one!

2007-06-25 09:37:17 · 4 answers · asked by Justbenice 1

I'm extracting hydrogen from water by running electricity through water and it worked but how do I prove that the hydrogen gas is released? is there any chemicals or indications can show that H2 exists in my experiment?

NOTICE that the chemicals or indicators have to be something that I can buy or create otherwise my experiment wouldn't maka sense....

2007-06-25 09:25:09 · 5 answers · asked by Boptimistic!!! 1

when copper is exposed to the air, it slowly turns green over a period of time. what type of change is occurring? can anyone explain.

2007-06-25 09:23:13 · 3 answers · asked by princess 2

Can an expert on the subject tell me if this is a correct hypothesis for the question above?

"The faster a gas can increase temperature/pressure, the higher the temperature estimated absolute value can be reached."

If it isn't, please provide me with something that can be written as a correct hypothesis to how estimate of absolute value varies with gas with a sufficient explanation. Thanks in advance! :)

2007-06-25 09:19:27 · 2 answers · asked by sillysalamander101 2

Which of these metals do you think is the most important in industry production today?

Be- Beryllium
W- Tungsten
Na- Sodium
Al- Aluminum

2007-06-25 09:09:30 · 2 answers · asked by CoinGirl12 2

a. Ionic compound
b. Covalent compound
c. Polyatomic ion
d. both a and c

2007-06-25 09:04:31 · 3 answers · asked by taelorcorey00 1

5.62 grams of a vapor from a volatile liquid fills a 562 mL flask....If the temp of the boiling water is 98 degrees Celsius, and the atmospheric pressure in the lab was at 777mmHg, determine the molecular weight of the liquid? HELLLP!!!

2007-06-25 09:02:15 · 2 answers · asked by af_woody1892 1

Where can you buy carbon monoxide and how much would it cost?

2007-06-25 08:51:02 · 4 answers · asked by Anonymous

2007-06-25 08:45:48 · 3 answers · asked by RICHARD C 1

2007-06-25 08:44:40 · 3 answers · asked by wonderwoman 1

I have heard that Cucumber is acidic. Is it true about it???

2007-06-25 07:50:57 · 4 answers · asked by JMNRSK! 2

2007-06-25 07:03:05 · 4 answers · asked by phreak77 1

2007-06-25 06:58:34 · 3 answers · asked by mzl0005 1

2007-06-25 06:57:20 · 3 answers · asked by mzl0005 1

ZnCl2 [aq] + 2KNO3 [aq] ---->?
Ca[OH]2 [aq] + 2Na OAc [aq] ---->?

2007-06-25 06:41:33 · 3 answers · asked by prabhjyot 2

I said:
1.5 moles of Ca
1 mole of P
4 moles of O

Am I right?

2007-06-25 06:32:41 · 3 answers · asked by Anonymous

2007-06-25 06:29:34 · 15 answers · asked by Jay z 1

2007-06-25 05:14:33 · 2 answers · asked by Anonymous

2007-06-25 05:10:36 · 3 answers · asked by Nathalie H 1

2007-06-25 05:05:35 · 1 answers · asked by reza p 1

Calculate the concentration of Fe, in ppm, in a solution prepared by dissolving 173.2mg of ferrous ammonium sulfate (392.143 g/mol) in water and diluting to volume in a 500mL volumetric flask. Calculate the ppm Fe in a solution prepared by diluting 5.00 mL of this solution to 100mL.

First, I calculated ppm of ferrous ammonium sulfate and got 346.4 ppm. Second, I calculated %Fe in ferrous ammonium sulfate and multipled that by the ppm in step one and got 49.3 ppm Fe.

For the second part I multiplied 49.3 ppm Fe x 0.005L to get how many mg of Fe is in 5mL and got 0.247. Next, I divided this value by 0.100 to show the ppm in 100mL and got 2.47 ppm Fe.

Is this right?

2007-06-25 04:52:35 · 3 answers · asked by ScienceNut 2

2007-06-25 04:41:52 · 2 answers · asked by swathi s 1

A gas is evolved upon the addition of sodium carbonate to a solution containing benzocaine and water. What is the gas and the balanced equation to get the gas.

2007-06-25 04:37:33 · 1 answers · asked by delta one 1

links to any good site on this subject would be appriciated

2007-06-25 04:31:06 · 2 answers · asked by Anonymous

2007-06-25 04:25:36 · 2 answers · asked by cbrenn71 1