Chemistry - January 2007

Ethanol is a fuel that can be made from corn. How many kJ of heat energy are released when 3.00 kg of ethanol are burned?

C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g) H = -1406.8 kJ/mol

answer in 3 sig figs

2007-01-19 04:17:58 · 2 answers · asked by MEB 2

I want to be able to measure in 1,2,and 3 gram weights if necassary,but my scale seems unable to register these small amounts!
This is a Salter model scale which I paid $50.00 for!Is there a trick to remedy this defective charecteristic so that I may be able to effectively measure a material which ways only a single gram,or two? ?

2007-01-19 04:15:07 · 3 answers · asked by Anonymous

2007-01-19 04:02:29 · 7 answers · asked by torirowe 2

I was just wonering since you can bend it?

2007-01-19 03:38:27 · 7 answers · asked by torirowe 2

2007-01-19 03:35:44 · 2 answers · asked by Ish 1

2007-01-19 03:35:35 · 5 answers · asked by Anonymous

i read about it somewhere.

2007-01-19 02:20:49 · 13 answers · asked by Rodney 1

oh i've tried and i have tried but i really can't find this sodium lactate in my area. what's a good substitute for it? i read that it acts as an electron donor for bioremediating organisms (see link). do you guys have any idea for a good substitute that works the same way?

http://www.p2pays.org/ref/14/0_initiatives/init/summer00/bioremediate.htm

2007-01-19 01:47:44 · 3 answers · asked by abstemious_entity 4

as it doesn't form a dative bond. how does is it stable as the carbon atom is lack of 2 electrons.

2007-01-19 01:32:44 · 5 answers · asked by Anonymous

2007-01-19 00:59:09 · 2 answers · asked by Anonymous

2007-01-19 00:38:24 · 4 answers · asked by Anonymous

it is called anomalous expansion of water ?? but why it is so

2007-01-19 00:05:38 · 12 answers · asked by Payal 1

2007-01-18 23:43:31 · 7 answers · asked by jemma_x 1

what is it, give me information for recent trends in biochemical technology.

2007-01-18 21:36:44 · 1 answers · asked by amit g 1

2007-01-18 21:35:04 · 6 answers · asked by {««мα∂gυу»»} 2

why do impurities lower freezing point but increase boiling point?

2007-01-18 21:05:03 · 2 answers · asked by anthony 1

give sources please

2007-01-18 20:50:50 · 1 answers · asked by the questioner 2

I know the indenfy of the Octet rule,but stiil don't when is called obey the Octet rule,and when is not?


Thank you

2007-01-18 20:47:45 · 2 answers · asked by shuyi 1

2007-01-18 18:47:44 · 5 answers · asked by Anonymous

Explain why the number of moelcules is not conserved in a balanced chemical equation. In other words, why isn't the total number of reactant molecules equal to the total number of product molecules for the reaction in this probelem below.


What volume of HF gas (in liters) will be needed to make this amount of product? You may assume that it is conditions of STP.

2007-01-18 18:18:48 · 4 answers · asked by Anonymous

2007-01-18 17:54:27 · 5 answers · asked by assctrl 1

2007-01-18 17:24:55 · 4 answers · asked by Onions 2

A geometric isomers


B enantiomers


C covalent isomers


D structural isomers

2007-01-18 16:51:06 · 5 answers · asked by Anonymous

124.0 g of a solution that is 6.85% glucose, C6H12O6, by mass.

2007-01-18 16:18:46 · 5 answers · asked by magicalplaygirl 1

2007-01-18 16:15:57 · 3 answers · asked by Hard Rocker 3

2007-01-18 16:02:44 · 8 answers · asked by willman1000000 1

2007-01-18 15:41:26 · 7 answers · asked by ShiningCrimson 3

2007-01-18 15:40:25 · 3 answers · asked by deepak_phy06 2

I always hear people trying "better" ways of converting salt water to fresh, but wouldn't boiling it and capturing the steam be an effective and viable way of doing thison a large scale? I know that the salt stays in the water when it evaporates, this is why the dead sea is so salty.I never really researched it, but to me, this would be by far the cheapest, easiest way to do it. Am I missing something?

2007-01-18 15:39:56 · 4 answers · asked by Redneck 1

In my chemistry class, we are writing a paper about identifying unknowns. Our teacher says all the compounds we need to identify will look like water. I have found ways to identify various ionic compounds, but how can you verify that an unknown compound is water scientifically?

2007-01-18 15:22:48 · 5 answers · asked by KobeFan24 2