Chemistry - September 2006

2006-09-04 13:16:23 · 6 answers · asked by Andy S 6

2CH3NH2(g) + 4O2(g) -> 2CO2(g) + 4H2O(g) + N2(g)

2006-09-04 13:10:48 · 7 answers · asked by Anonymous

This is for chemistry class

2006-09-04 12:54:40 · 12 answers · asked by skmhazel29 2

Any element

2006-09-04 12:24:58 · 26 answers · asked by Anonymous

2006-09-04 12:20:00 · 8 answers · asked by rowdyonez 2

2006-09-04 11:57:03 · 5 answers · asked by Anonymous

*AP Chemistry: Hydrate Lab* If the accepted value was 5 and the percentage error was found, how do you show what would happen to the accepted value if you did not drive off all the water in the crystal?

2006-09-04 11:56:16 · 2 answers · asked by aSnxbByx113 2

The balanced equation is C5H12 + 8O2 = 5CO2 + 6H2O
There are 5 moles of CO2 present. Is the 4.52^23 molecules for 5 moles of CO2 or for 1 mole of CO2? I can solve it if you can answer just that but a whole answer would be appreciated.

2006-09-04 11:46:21 · 1 answers · asked by greenwhitecollege 4

2006-09-04 11:13:39 · 6 answers · asked by foxtrot 3

discovery of penicillin

2006-09-04 10:34:38 · 7 answers · asked by angelgirl 1

2006-09-04 10:16:15 · 3 answers · asked by ranzjr 1

I need help balencing this redox equation in NET IONIC form:
Zn(s) + 2 HCl(aq) --> ZnCl2(aq) + H2(g)

normally I would just do:
Zn + 2H+ --> Zn(2+) + H2
but our teacher wants us to use H3O+ instead of H+

So now I'm stuck with this:
Zn + H3O+ --> Zn(2+) + H2
and I don't know how to balance it.

thanks!!

2006-09-04 09:59:19 · 4 answers · asked by Lauren 1

2006-09-04 09:33:55 · 4 answers · asked by Anonymous

http://answers.yahoo.com/question/?qid=20060904132125AAFCkaa&r=w#NbUvWzC4WDRxz2Fi5EPD

(You'll see why this is under "Chemistry"...)

2006-09-04 09:32:05 · 3 answers · asked by Anonymous

One of the questions I have to answer is: "Characterize the following compounds as soluble or insoluble in water: (a) CaCO3, (b) ZnSO4, (c) Hg(NO3)2, (d) HgSO4, (e) NH4ClO4"

What I don't understand is how to recognize soluble and insoluble compounds. Please help!

2006-09-04 08:44:15 · 13 answers · asked by Anonymous

2006-09-04 08:41:23 · 3 answers · asked by Anonymous

the recovery of CaCO3 was attempted by adding 3M H2SO4 instead of 3M HCl to the SiO2 / CaCO3 residue

2006-09-04 08:28:10 · 1 answers · asked by Anonymous

do we need nitrogen to survive just like we need oxygen?

2006-09-04 08:16:33 · 9 answers · asked by pearly_cherry 4

In chemistry we are doing a candle lab. one of the questions for the lab report is:

Determine how long it would take for your entrie candle to be extinguished.

the data im using is the height of the candle. before it started to burn it was 6.5cm tall. after EIGHT minutes of burning it was 2cm.

so; how long would it take for it to be completly extinguished? thanks!

2006-09-04 07:50:04 · 2 answers · asked by Anonymous

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 8.00 g of sodium carbonate is mixed with one containing 6.75 g of silver nitrate. How many grams of each of the following compounds are present after the reaction is complete?

sodium carbonate

silver nitrate

silver carbonate

sodium nitrate

2006-09-04 07:49:59 · 1 answers · asked by Anonymous

whats a good slogan for why we need nitrogen??

2006-09-04 07:45:17 · 3 answers · asked by pearly_cherry 4

2006-09-04 07:12:55 · 21 answers · asked by niraj_bhindi 1

2006-09-04 06:48:37 · 6 answers · asked by Anonymous

Question:

Can someone tell me how each of the following changes would affect the amount of the specified substance recovered????


1. the recovery of CaCO3 was attempted by adding 3M H2SO4 instead of 3M HCl to the SiO2 / CaCO3 residue

2. the recovery of CaCO3 was attempted by adding 1M KNO3 solution instead of 1M K2CO3 solution to the filtrate, containing aqueous CaCl2

2006-09-04 06:47:23 · 1 answers · asked by Anonymous

2006-09-04 06:40:27 · 6 answers · asked by sade f 1

I live in a rich oregano area in Mexico. I know about the profits you can make processing this plant. Unfortunetely, I am not a Chemistry Specialist and I don't know the exact process, and wich materials or equipment to use in order to extract the oil from the plant.
Thanks in advance.

2006-09-04 06:36:36 · 2 answers · asked by Orejas de Portari 3

2006-09-04 06:33:19 · 19 answers · asked by shri420 1

If you use100g of glucose in 0.5L of H2O, what molar concentration is the sugar solution? Any help would be appreciated. Thank you

2006-09-04 06:20:48 · 5 answers · asked by ♥HeidiJustine♥ 4

2006-09-04 06:15:40 · 27 answers · asked by desmond r 1

I AM CONFUSED IN IT CAN U HELP ME?

2006-09-04 06:13:19 · 2 answers · asked by shri420 1