Chemistry - July 2007

2007-07-07 18:49:37 · 1 answers · asked by christaglo 2

Theoretical yeild ??
Using the follwing information,calculate the theoretical yeild for the dehydration of 3.0 mL of cyclohexanol.

Substance --> molar mass(g/mol) --> d (g/mL)
cyclohexanol --> 100.16 ----> 0.948
cyclohexene----> 82.15----> 0.811

2007-07-07 18:32:07 · 2 answers · asked by goofy 2

2007-07-07 18:21:59 · 1 answers · asked by never_cry_for_nothing 2

im confused why is 1/t or 1/time is used as initial rate in the determining the rate law...
and in another experiment, 1/t was used as a measure of rate constant k...

2007-07-07 16:31:22 · 1 answers · asked by melvin m 2

plz help .....

2007-07-07 15:40:19 · 10 answers · asked by Anonymous

sulfur and oxygen can react to form both sulfur dioxide and sulfur trioxide. in sulfur dioxide, there are 32.06 g. of sulfur and 32.00 g. of oxygen. in sulfur trioxide, 32.06 g. of sulfur are combined with 48.00 g. of oxygen.

a. what is the ratio of the weights of oxygen that combine with 32.06 g. of sulfur?

b.How do these data illustrate the law of multiple proportions?

2007-07-07 12:44:22 · 1 answers · asked by Becca 1

I'm trying to figure out if these actions would be pure chemistry, applied chemistry, or both pure and applied chemistry.

1. Determining how much energy is released when iron forms rust.
2. Determining how the size of silver grains on photographic film affects the resolution of the finished print.
3. Isolating a chemical compound from the leaves of a newly discovered tropical plant.
4. Developing a method of purifying the polluted well water in a small town.
5. Determining what elements exist on a distant star.

Your help is greatly appreciated! Thanks.

2007-07-07 11:06:12 · 4 answers · asked by Steven M 3

0.42% of acetic acid molecules in 1.0 M solution are ionized at 25 celcius. Calculate values of Ka, and pKa for acetic acid.

2007-07-07 10:49:11 · 3 answers · asked by sandy 1

What happens to my peanut butter when i add water to the pot and let it rest? It smells so awful after a while, I almost died in the kitchen from breathing it.

2007-07-07 10:45:09 · 5 answers · asked by Roy Nicolas 5

2007-07-07 10:43:27 · 8 answers · asked by slh74 2

I understand that the ester group in an aspirin molecule is released to acelytate the OH group on COX but what does the carboxylic acid do?

2007-07-07 10:30:16 · 2 answers · asked by jonnynomates1 4

What is the correct formula for aluminum sulfide?

2007-07-07 09:40:52 · 8 answers · asked by yod 1

What is the correct formula for calcium nitride?

2007-07-07 09:27:42 · 5 answers · asked by yod 1

well were doing an indie show for brockton and we need fog but fog machines are to loud so i was wondering about dry ice fog how long will the fog last and what if i ad food coloring to the liquid or ice will the fog change and does the fog rise or stay closer to the ground ?????

2007-07-07 08:33:56 · 3 answers · asked by anthony m 1

allotropes have similar chemical properties

2007-07-07 07:21:01 · 5 answers · asked by ni n 1

What's iron and What'e metal?
Are metal and metalic different?

2007-07-07 07:15:31 · 3 answers · asked by peopleme 1

2007-07-07 06:43:51 · 14 answers · asked by Bobbi 2

I have a ring that i am selling in a personal sale and the gentleman that is interested in purchasing it said that before he purchased it he had to test it. put it in a liquid and if its not above 10k it would eat away.
have you heard of this? is it for real? will it harm the diamond in the ring??

2007-07-07 06:35:15 · 9 answers · asked by blmbean 2

I was just wondering if the clean air that we breathe every day has a liquid form (I'm not talking about H2O molecules in air, I mean air itself). Obviously it does, but my question is at what temperature does the air condense into a liquid? And what would it look like? It must be lower than -89 Degrees Celsius (-129 Farenheit) cause that's the coldest temperature ever recorded...

2007-07-07 06:35:04 · 4 answers · asked by Ron 2

Calculate the mole fraction of the solution made by mixing 1.998 g of p-xylene (C8H10) and 130 g of cyclohexane (C6H12).

Mole fraction of p-xylene?
Mole fraction of cyclohexane?

2007-07-07 06:32:56 · 2 answers · asked by Anonymous

2007-07-07 06:26:35 · 3 answers · asked by sohey d 1

what does the "per" mean when it is in an equation u write. for example: Sodium peroxide or Perbromic Acid. Also the equations for each would help too!

2007-07-07 06:11:23 · 3 answers · asked by PETER Boy 2

Can someone tell me how to turn a Fischer projection for aldohexoses, aldopentoses, and ketopentoses into a Haworth projection? I know it goes through a hemiacetal sythesis reaction, but I'm not sure of the steps. Thank you!

2007-07-07 06:01:08 · 2 answers · asked by patti.rollins@sbcglobal.net 1

im always confuse in the sign conveNtions...of..:

1) energy release by the system
2) enegy used by the system
3) work done by the system
4) work done on the system
5) work done against the system
6) work done in the system

MAIN QUESTION ARE THE CONVENTIONS DIFFERENT FOR PHYSICS AND CHEMISTRY..............

TELL THE CONVENTIONS FOR BOTH PHYSICS AND CHEMISTRY !!!!!!!!!!!

THANKING U.

2007-07-07 05:52:09 · 4 answers · asked by wizard 1

What is the boyles law equation for both
1) REAL gas
2)ideal gas

2007-07-07 05:47:54 · 5 answers · asked by wizard 1

is it true always...??
give examples of ideal gases..??

2007-07-07 05:46:30 · 8 answers · asked by wizard 1

How many grams SO2 can be formed from 20.0 g of S and 160g O2?


How many gramsSO2 can be formed from 20 g S and 15.0 g of O2?

2007-07-07 05:45:21 · 2 answers · asked by Zainab 2

When the liquids acquires the shape of the container .....
why their volume is less than that of the container...??

give a good answer..all the best...im able to understand all terms...

thanx

2007-07-07 05:45:18 · 5 answers · asked by wizard 1

a)would you expect beryllium, element 4, to react vigorously with water? Explain.

b)what is the relationship between the properties of elements and their position on the periodic table?

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

2007-07-07 05:42:58 · 4 answers · asked by princess 2

a)which of the following four metals-calcium, sodium, potassium, or magnesium-is the most chemically reactive? Give at least three reasons.

b)would you expect cesium, element 55, to be more or less reactive than potassium? explain.

PLEASE HELP ME WITH THIS!!!!!!

2007-07-07 05:38:43 · 3 answers · asked by princess 2