Chemistry - July 2007

Here's the problem:
From the combustion of C2H6, a mixture of CO2 and H2O with a mass of 5.65 g was produced. The volume of the vessel containing the mixture was 8.45L and the temperature was 150 degrees C.
A)Write balanced equation:
Here I came up with 2C2H6 + 7O2= 4CO2+6H20
B)Determine mole fraction of each:

2007-07-07 05:38:21 · 4 answers · asked by sweetnsouram 1

electrons flow from low potential to high potential(towards +ve terminal) while the direction of electric force is from high potential to low potential.doesnt this force resist in the motion of electron???

2007-07-07 05:30:36 · 7 answers · asked by abdul r 1

Then, What is the enthalpy change for the reaction? Include units.

2007-07-07 05:29:53 · 4 answers · asked by Zainab 2

a)which physical and chemical properties would indicate that potassium and sodium belong to the same group or family of elements?

b)which physical and chemical properties would indicate that calcium and magnesium belong to the same group or family of elements?

c)compare the reactivity of the alkali metals with the reactivity of the alkaline each metals.

PLEASE HELP WITH THIS!!!!!!!!!

2007-07-07 05:23:49 · 2 answers · asked by princess 2

2007-07-07 05:22:21 · 2 answers · asked by devilblues 1

2007-07-07 03:26:18 · 3 answers · asked by Duanne Kriselle T 1

2007-07-07 03:22:00 · 1 answers · asked by Duanne Kriselle T 1

and also whats d dif between chlorine,chloride

2007-07-07 00:41:22 · 13 answers · asked by Anonymous

Please answer only if you have actual knowledge or have advanced degree in chemistry. Please list in order from strongest to weakest: paint thinner, lacquer thinner, gasoline, acetone, kerosene, disel fuel, jet fuel. I'm trying to determine what is the best way to clean the fuel system in my old chevy truck that run on high octane gas, and an old disel tractor that has been sitting idle for more than a year old. Thank you.

2007-07-07 00:40:11 · 2 answers · asked by Maikah 2

is it any related to the arrangement of particles in alcohol?

2007-07-06 22:21:50 · 5 answers · asked by nana 2

2007-07-06 21:48:19 · 5 answers · asked by kustian 1

2007-07-06 21:37:46 · 7 answers · asked by >D_ConTradictor< 4

2007-07-06 20:21:26 · 2 answers · asked by kustian 1

howmany grams make 30 ml.

2007-07-06 20:10:48 · 2 answers · asked by Anonymous

2007-07-06 20:01:27 · 1 answers · asked by mallikarjuna D 1

2007-07-06 19:53:46 · 1 answers · asked by paris12 2

2007-07-06 19:50:36 · 2 answers · asked by Anonymous

ok. so my proj is the effect of diiferent solutes on the temperature of boiling water

i chose six solutes.

and my hypotheisis is that salt will cause the maximum rise in the temperature. and sugar will cause the lowest
i went by intution and my teacher says i shld hv reasons to support my hypothesis.

wat should be my hypothesis

2007-07-06 19:15:15 · 2 answers · asked by Anonymous

2007-07-06 18:30:05 · 12 answers · asked by Anonymous

2007-07-06 18:11:18 · 1 answers · asked by Anonymous

molar mass(g - tin- 118.71
avogadro's no. - 6.022x10^23

please show me the way to do it

2007-07-06 18:00:24 · 2 answers · asked by Anonymous

Compared to Cl− or Br−, in the 2-butanol reaction,

a. H2O is a relatively good nucleophile, because it had to be avoided during the workup procedure.
b. H2O is a relatively poor nucleophile, because no or very little alcohol is observed in the GC.
c. H2O is a relatively poor nucleophile, because it carries no negative charge.
d. H2O is a relatively good nucleophile, because the yield of halides was low due to back-reaction with water.

2007-07-06 17:19:22 · 1 answers · asked by Anonymous

in the experiment we performed, tiosulfate and HCl, when i was computing for the the order of reaction of HCl, one of our data gave a negative order of reaction with respect to H+...
is it possible or just an error in the datum?

2007-07-06 16:54:48 · 3 answers · asked by melvin m 2

When comparing two molecules like Br2O3 and SO2

2007-07-06 15:26:16 · 2 answers · asked by Sean F 2

pls gv the ans asap

2007-07-06 15:21:16 · 2 answers · asked by Anonymous

For example comparing ICl to Br_2_
or...
PH_3_ to SiH_4_
Only with the help of a periodic table.

2007-07-06 14:58:59 · 2 answers · asked by Sean F 2

The ∆H of combustion of C2H6 is 1541kJ per mole.

2007-07-06 12:59:19 · 1 answers · asked by Anonymous

can anyone help with this?

as you are cleaning the kitchen cupboards, you come across four unlabelled jars, each containing clear, colourless liquids. You then find the four paper labels that must have fallen off the jars. The labels contain the following headings: water, rubbing alcohol, vingar, and salt water. Design an experiment that would allow you to determine the identity of each of the substances. Your experimental design should include:

+a detailed, coherent, and logical procedure
+a list of materials and exquipment
+a list of safety considerations, e.g., No tasting allowed!
+an observation chart
+three questions that would help you analyze your data in order to properly identify each substance
+a conclusion (or a statement about making connections or applications)

THANK YOU FOR YOUR TIME TAKING IN WRITING YOUR ANSWER!

2007-07-06 11:48:12 · 4 answers · asked by princess 2

is chloride a covalent bond?

2007-07-06 11:40:36 · 4 answers · asked by Anonymous

amorphous
ionic
network covalent
molecular

2007-07-06 10:26:40 · 5 answers · asked by D 1