Chemistry - December 2007

A particular coal contains 4.3% sulfer by mass as an impurity. When the coal is burned, the S is converted to gaseous SO2. The SO2 enters the exhaust gases, where it is removed by reaction with powered CaO to produce solid CaSO3. How much by-product CaSO3, in tons, is produced by the burning of 1 ton of coal?
(please include equations)

2007-12-08 11:08:08 · 4 answers · asked by Anonymous

a) NH3
b) H2O
c) HF
d) CH4
e) CH3OH

2007-12-08 10:58:47 · 5 answers · asked by peluc 1

1. Determine the mass of 0.50 moles of table salt (NaCl).
2. How many atoms are contained in 0.55 mole of calcium metal?
Can anybody teach this to me? Thanks!

2007-12-08 10:51:02 · 4 answers · asked by alleycat 1

find the pH of a solution that has a hydrogen - ion concentration of 4.82 * 10^ -2 mol/L

2007-12-08 10:50:28 · 3 answers · asked by Eska 1

I want something "cute" if you will, or something funny. Don't point out the obvious and put stuff like "Mercury" or "Mercury the Element"

2007-12-08 10:49:17 · 4 answers · asked by ULikeyDaMuffinz? 3

Thank You for Your Time and Answer...

Banirocks

2007-12-08 10:47:58 · 4 answers · asked by isranirockstar 2

a) the rate of diffusion is lower in solids

b) the density of solids is usually higher

c) the conpressibility of liquids is higher

d) liquids have higher vapor pressure

e) the heat of vaporization is less than the heat of fusion

2007-12-08 10:47:13 · 4 answers · asked by peluc 1

2. What are the properties of water that make it a unique substance? Explain why water has these properties.


Thank You For Your Answers!!!

2007-12-08 10:46:29 · 4 answers · asked by isranirockstar 2

http://seattlepi.nwsource.com/fun/rhymes.asp?date=20071207
Comic: Rhymes with Orange archive date: 12-7-07

Dating is always risky...but rewarding.

2007-12-08 10:26:34 · 4 answers · asked by Anonymous

2007-12-08 10:25:15 · 1 answers · asked by lucy p 1

2007-12-08 10:14:09 · 3 answers · asked by maninthecornner 3

What is meant by "ionic forces of attraction are non-directional"?

2007-12-08 10:11:36 · 2 answers · asked by Anonymous

The number of significant figures in the answer to 156.0-121.02 is
2,3,4, or 5

is it 3?

2007-12-08 10:08:17 · 4 answers · asked by ineedhelpbadly 2

2007-12-08 09:58:56 · 2 answers · asked by jpbthedude 2

2007-12-08 09:57:23 · 3 answers · asked by WayofLife24 2

2007-12-08 09:49:15 · 4 answers · asked by pau y 1

meaning what is is used for and does it do anything to the human body? its for a science project.

2007-12-08 09:38:36 · 2 answers · asked by Brijet 2

Diborane, B2H6, is a highly explosive compound formed by the reaction:
3NaBH4 + 4BF3 —> 2B2H6 + 3NaBF4 (already balanced)
What volume of diborane at 22°C and 738 torr is formed from 26.0 g NaBH4 (sodium borohydride)?

2007-12-08 09:06:10 · 2 answers · asked by wizkid9000 1

A biochemist studying the breakdown in soil of the insecticide DDT finds that it decays by a first-order reaction with a half-life of 12 yr. How long does it take DDT to decay from 305 ppbm to 17 ppbm in a soil sample ("ppbm" is parts per billion by mass)?

2007-12-08 08:37:46 · 3 answers · asked by socr8711 2

What is a device that converts thermal energy into mechanical energy??



apreciate answers!!!

2007-12-08 08:34:41 · 3 answers · asked by Afsoun_Nicole_32907 2

What is made when aluminium carbonate reacts with nitric acid?
And what is the chemical formula?

I think so far i have Al2(CO3)3+HNO3 -->?
This formula is not balanced, and i don't know if it's right so far.
x

2007-12-08 08:23:07 · 6 answers · asked by Anonymous

Umm.Yeah.

2007-12-08 08:13:44 · 6 answers · asked by Starstruck in LovE 2

Dose anyone know of websites that shows how to separate H2O? Or if any of yall could tell me what I need and/or what to do? Please tell me.

Thank you for your answers.

2007-12-08 08:10:14 · 6 answers · asked by Anonymous

2007-12-08 08:04:57 · 4 answers · asked by azaa 3

I'm new to teaching chemistry and have a lab with NO manuals or books, but tons of chemicals and other materials.. Thinngs like magnesium sulfate, copper sulfate, citric acid, calcium chloride, copper sulfate solution, etc. The list goes on and on. There are literally 100's of bottles, vials, etc. in the lab. I've obviously done experiments in HS and college . . . but where do I find experiments using chemicals like these, with 7th and 8th graders. I was thinking of copper plating and things like that. But other than that, what can I do to show chemical reactions with these materials? BTW: I was a Bio major and most classes I teach are Bio. I have 2 chem classes. One 7th/ one 8th.

2007-12-08 08:03:26 · 3 answers · asked by N F 4

A biochemist studying the breakdown in soil of the insecticide DDT finds that it decays by a first-order reaction with a half-life of 12 yr. How long does it take DDT to decay from 305 ppbm to 17 ppbm in a soil sample ("ppbm" is parts per billion by mass)?

2007-12-08 07:39:21 · 1 answers · asked by socr8711 2

2007-12-08 07:21:20 · 4 answers · asked by Anonymous

Consider the reaction:

2HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2H2O(l) ΔH = -118 kJ

Calculate the heat when 100.0 mL of 0.449 M HCl is mixed with 300.0 mL of 0.164 M Ba(OH)2.

How many kJ of heat is evolved?

2007-12-08 06:54:33 · 1 answers · asked by Anonymous

What is the molarity of K+ ions that a solution of 3.49M of K2SO3 will have?


many thanks!!!

2007-12-08 06:46:50 · 2 answers · asked by Hey D 1

2007-12-08 06:46:49 · 5 answers · asked by RandomGirl 2