Chemistry - August 2007

While turning the turbines the amount of water which is going inside is equal to amount of water comming out, but still electricity is produced which is made up of electrons. so definitely law of conservation of mass should be wrong. Then still why do we practice it?

2007-08-29 02:49:56 · 4 answers · asked by Amogha c 1

While turning the turbines the amount of water which is going inside is equal to amount of water comming out, but still electricity is produced which is made up of electrons. so definitely law of conservation of mass should be wrong. Then still why do we practice it?

2007-08-29 02:49:17 · 2 answers · asked by Amogha c 1

a) NH2OH
b) PhMgBr
c) 1,2 ethanediol H+ catalyst
d) LiAlH4

2007-08-29 02:33:43 · 1 answers · asked by Anonymous

2007-08-29 02:10:19 · 2 answers · asked by thereddevil_mania 1

2007-08-29 01:27:48 · 2 answers · asked by roz 2

i am doing an experiment.

2007-08-29 00:57:17 · 2 answers · asked by Cheery 1

2007-08-29 00:56:32 · 1 answers · asked by 4352 2

2007-08-29 00:43:10 · 1 answers · asked by usa197368 1

i think it should contain or composed of protein or starch

2007-08-28 21:52:21 · 3 answers · asked by lost girl 1

Thank you for all the replies. What I am trying to ask is, as 2NaCl is a product compound can it aslo be written as Na2Cl2? As this must be stating the same thing? I know salt is NaCl but how would I know not to write the above as Na2Cl2? This is what's confusing me!

2007-08-28 20:19:36 · 6 answers · asked by Gideon 1

2007-08-28 20:10:54 · 2 answers · asked by mohd h 2

2007-08-28 20:04:16 · 5 answers · asked by House of Cards 1

i need to add the insoluble compound to the water and see the reaction which occurs but the susbstance should be found in the home enviroment and i need to analyse the relationship between the solubility of substances in water and the polar nature of the water molecule, thanks very much

2007-08-28 19:42:51 · 7 answers · asked by lost girl 1

what is (8.84*10^(-15))/(.001232)?

2007-08-28 19:29:44 · 3 answers · asked by Winnie 3

2007-08-28 19:16:03 · 4 answers · asked by John Michael C 1

please give a molecular explanation.

2007-08-28 19:12:12 · 1 answers · asked by John Michael C 1

i have no idea how to do these 2 problems and i have one more try to get them right because its online. i need your help!

The density of aluminum is 2.70 g/cm3. A square piece of aluminum foil, 8.0 in. on a side, is found to weigh 2.575 g. What is the thickness of this foil, in millimeters?

and

The accompanying illustration shows a 100.0 mL graduated cylinder half-filled with 6.8 g of diatomaceous earth, a material consisting mostly of silica and used as a filtering medium in swimming pools. How many milliliters of water are required to fill the cylinder to the 100.0 mL mark? The diatomaceous earth is insoluble in water and has a density of 2.2 g/cm3.

thanks in advance for any help i really appreciate it!

2007-08-28 18:05:29 · 3 answers · asked by red_bullgivesyouwings 2

Flask and stopper = 31.601g
Flask, stopper, and water = 60.735g
Density of water = .9973g/cm^3
Mass of water = 29.134g
Mass of filled flask = 60.735g
Mass of empty flask = 31.601g

D=m/v or v=m/d

Volume of water= volume of flask= 29.21 cm^3

Applications:
Mass of unidentified liquid= 56.796g – 31.601g = 25.195g

The volume of the liquid is the same as the volume of the flask, 25.195g is the mass of the unknown liquid.
Question1)What is the volume of the unknown liquid?
Question 2)What is the density of the unknown liquid in g/cm^3?

Additional info(to be applied to the following questions):
Flask, stopper, and metal = 99.323g
Flask, stopper, metal, and water = 12.827g
Mass of metal = 60.092g
Mass of water = 21.504g

The water’s volume is found based upon its density, as in 1 lb.

Question 3) What is the volume of water (in cm^3)?

Based upon the volume found in question 3:
Volume of the metal = volume of the flask – volume of the water
Volume metal = _____question #4______cm^3 - ______question #5________cm^3 =
______question #6______cm^3

After having found the density of the metal; using the equation in 1 lb.
Question #7: What is the density of the metal is g/cm^3?

2007-08-28 17:29:35 · 1 answers · asked by 1234567890 5

Cu + AgNO3 -> Ag + Cu(NO3)2

As many steps as you can give would be great! My book is the worst and I know nothing about where or how to begin!
Thanks so much!

2007-08-28 17:19:34 · 3 answers · asked by Anonymous

There are possibilities of 0-3 for the numbers i think there were about 5 of them? i can't find them anywhere. the ones i am looking for are the hazard numbers of acetylsalicylic acid, citric acid, and sodium bicarbonate. thanks.

2007-08-28 16:26:04 · 3 answers · asked by Anonymous

I have this chemistry project where i have to design the square in the periodic table of elements for Rubidium (Rb). I cant name what it is on the square, but have to give clues with the design of the square. I've done research and found that it is silvery white liquid at room temperature. but i don't think I can work with much with this, especially if i dont put the name on it!! Can someone tell me a defining property or key feature of this element that I can incorporate into the design???

2007-08-28 15:48:24 · 3 answers · asked by koolkitti70 1

Ninette wants to sweeten her iced tea. She looks in the restaurant's sugar dish and sees regular white granulated sugar and a packet of natural sugar. She opens each and sees that the natural sugar has very large crystals, much larger than the granulated sugar. Which sugar would be more likely to dissolve without Ninette having to stir the tea? Explain.

2007-08-28 15:45:19 · 5 answers · asked by goodygood800 1

its for a project

2007-08-28 15:04:43 · 5 answers · asked by Anonymous

2007-08-28 15:04:31 · 12 answers · asked by Ana S 1

2007-08-28 14:07:55 · 1 answers · asked by Chaucer 1

2007-08-28 13:58:16 · 1 answers · asked by Deesa 2

This is an example of...

a. solvent

b. hot

c. heterogenous

d. saturated

2007-08-28 13:49:20 · 4 answers · asked by Josh 2

a. liquid

b. gas

c. solid

d. ice

2007-08-28 13:47:16 · 1 answers · asked by Josh 2

a. oxygen dissolved in liquid

b. alcohol in liquid

c. carbon dioxide dissolved in liquid

d. liquid changing to a gas

2007-08-28 13:41:37 · 6 answers · asked by Josh 2

If i have 179c units of beans then how do I calcuate the weight of one bean??

2007-08-28 12:45:37 · 3 answers · asked by Steven V 2