Chemistry - May 2007

What volume does the balloon have when it has risen to a point in the atmosphere where the pressure is 200 Torr and the temperatue is -45 degree C?

2007-05-29 05:45:24 · 1 answers · asked by BIG X 2

2007-05-29 05:39:49 · 1 answers · asked by Dance Girl 1

easy to understand

2007-05-29 05:39:45 · 2 answers · asked by Anonymous

yes yes im heare again lol anyways doin anothher chem paper i need to no the chemical structure(make up)of the foods please leave a saource telling me where i can find this informationn...my teacer needs to no k love ya

2007-05-29 05:39:44 · 2 answers · asked by dncrgal55 2

yes yes im heare again lol anyways doin anothher chem paper i need to no the chemical structure(make up)of the foods please leave a saource telling me where i can find this informationn...my teacer needs to no k love ya

2007-05-29 05:39:36 · 1 answers · asked by dncrgal55 2

Calculate the molarity of a solution made of 27 g. of calcium hydroxide and 480 g of ethanol


How do I do this?

2007-05-29 05:37:41 · 3 answers · asked by Anonymous

easy to understand

2007-05-29 05:31:37 · 2 answers · asked by Anonymous

I need the brief answers of this question?

2007-05-29 05:22:20 · 3 answers · asked by Anonymous

For my chemistry project I need to make the perfect candle; basically, i'm being graded on several factors: It has to burn for a long time, it should have a shape that prevents it from dripping, it should smell nice, have a good appearance, and also give off a good amount of light. Any tips on making such a candle? Remember, it has to burn long while giving off a good amount of light also.

2007-05-29 05:15:07 · 1 answers · asked by Anonymous

Many bottled water companies are harvesting sea ice amnd artic ice flows from the ocean in order to melt them and sell the water as bottled water because this type of sea ice is extremely pure. In fact it is almost completely frozen fresh water despote formed from ocean salt water. EXPLAIN why this is so.

2007-05-29 05:12:11 · 2 answers · asked by Anonymous

Calculate the molarity of a solution made of 27g. of calcium hydroxide and 480 g. of ethanol

2007-05-29 05:10:27 · 4 answers · asked by Anonymous

Removing salt from sea water b evaportation is one mathod of obtaining salt for commercial and home use. In order to do this does the solute in ocean water have to undergo a chemical change?

How about the solvent?

2007-05-29 05:10:03 · 3 answers · asked by Anonymous

need help thanks

2007-05-29 05:02:46 · 1 answers · asked by Me 3

I need to know for this thing. and it would be a great help.

2007-05-29 04:59:11 · 1 answers · asked by Me 3

dinitrogen monoxide, sometimes called nitrous oxide. If 150ml of nitrous oxide were collected over mercury at 42degree C and under a pressure of 75.5 cm of mercury, how many grams of nickel had reacted?

2007-05-29 04:40:51 · 1 answers · asked by BIG X 2

I need to do this cheminstry experiment for school and have no idea how to do it!!
I need to prove that calsiumsulphate can only desolve partly in water. To do this I need to use certain chemicals and apparatus to find the mass of the calsiumsulphate in 0.5 dm musicipal water. Please help!!!

2007-05-29 04:35:59 · 1 answers · asked by Belle 1

I have my final coming up and im completely clueless. HELP =(

2007-05-29 03:47:58 · 1 answers · asked by Steph 1

If 0.0463 g of a radioisotope remained after five half-lives, then the original mass was _____ g.

when answering would you mind telling me how you came up with your answer please and thankyou to all who answer!

2007-05-29 03:44:39 · 2 answers · asked by MEB 2

do you all know that matter is very small beyond our imagination please answer me why or what is the reason behind this?

2007-05-29 03:41:49 · 1 answers · asked by gomessonalilove 1

a) 2-hydroxypropane

b)1,3-dichlorocyclhexane from cyclohexane

c)2-methyl-2-hydroxypentane from an alkene

d)chlorobenzene

2007-05-29 03:12:26 · 1 answers · asked by Anonymous

2007-05-29 02:10:51 · 1 answers · asked by Anonymous

2007-05-29 01:58:24 · 5 answers · asked by blah 1

why solubility at 20 degree goes down but boiling point goes up
CH3-OH
CH3-CH2-OH
CH3-CH2-CH2-OH
I think they have the same kinda bonding like hydrogen bond , different is the bonding on the middle
i think the third molecule have more bonds therefore they need more energy to break the bond that implies boiling point goes up but im not sure my answer

2007-05-29 01:49:13 · 3 answers · asked by antony n 1

2007-05-29 01:20:07 · 7 answers · asked by neo 2

Copper(II) sulfate
Calcium Sulfate
Sodium Chloride
Sodium Carbonate
Glucose
Naphthalene
Hexane
Ethanol

2007-05-29 00:06:05 · 4 answers · asked by Anonymous

And if possible a website where I can find some information about it. Thanks for your time.

2007-05-28 23:42:43 · 8 answers · asked by iPodlord 4

Hydrogen cyanide (boiling temp 26C) is an important chemical for the production of nylon and various transparent plastics. It is produced on an industrial scale by the oxidation of methane in the presence of ammonia. The equation below is an unbalanced form of the chemical reaction to produce hydrogen cyanide.
I have to write a balanced equation and the steps to balance it. I have to assume that the reaction occurs at a temp above 100C

CH4 + NH3 + O2 = HCN + H2O

2007-05-28 22:52:47 · 2 answers · asked by cara g 1

2007-05-28 21:54:43 · 4 answers · asked by himansu sekhar rout 1

2007-05-28 21:36:37 · 1 answers · asked by botticellipear 1

What information does acid/base titrations give? how does the acid titration allow you to determine the solubility constant in experiment?

2007-05-28 21:25:58 · 2 answers · asked by azncrazygurl520 1