Chemistry - November 2007

I cannot find the answer to this question anywhere. So I thought I would try here. Basically I need to know Zn(OH)2 + H2SO4 --> __________ + _____________!!!
Any tips or answers you can give me are greatly appreciated.

2007-11-28 05:02:52 · 2 answers · asked by Chloe 1

2007-11-28 04:49:57 · 7 answers · asked by Music # Blast 3

2.list the kinds of chemical reaction.
3.what are the products , when wax burns?
4.How can water be decomposed into its elements, hydrogen and oxygen?
5. How can silver be prevented from tarnishing?
6. Identify these properties of matter as chemical (C) or physical(P). a. magnetic, b. rusting, c. shape, d. oxidizing, e. density, f. electroplating, g. color, h. burning, i. weight, j. reaction with acid, j. hardness

2007-11-28 02:42:17 · 1 answers · asked by rosemariestewart64 1

2007-11-28 02:08:35 · 1 answers · asked by adams girl 2

2007-11-28 00:14:58 · 10 answers · asked by nat2_16 1

Someone told me I had to smelt it.

2007-11-27 22:46:07 · 1 answers · asked by roxyandneo 1

I'm learning about IONIC solids and COVALENT solids.

How can I explain how their bonds have to do with:

1. Odor
2. Hardness
3. Melting point
4. Solubility with water
5. Solubility with propanol
and 6. Electrical conductivity


(best answer= 10 points, don't forget...)

2007-11-27 21:42:14 · 4 answers · asked by Zobbiezob 3

2007-11-27 20:48:39 · 3 answers · asked by Anonymous

I have to solve the following limiting reagent question using two different methods and am stuck! I think I can use gram to mole conversation and dimensional analysis? I am new to this stuff so any help most appreciated.
CaO + H2O -> Ca(OH)2
find out how much calcium hydroxide will be produced when 10.00 g of calcium oxide reacts with 3.00 g of water.

2007-11-27 18:53:53 · 2 answers · asked by Gideon 1

___Fe(s) +___O2 (g) arrow ____Fe2O3

2007-11-27 17:45:57 · 8 answers · asked by frenchl 1

2007-11-27 17:15:56 · 5 answers · asked by Simba 2

Hydrogen sulfide is removed from the natural gas used to heat homes through a reaction with oxygen

2007-11-27 15:44:06 · 8 answers · asked by Anonymous

ok my science teacher and i have a bet that i cant make drinkable wine in an hr to 30 min . were going to put yest in frute juice and put a balloon over the glass and let it fill up the balloon. as we all know this is LIKE the way they make wine giving more sugar and what not . im just wondering if this can even happen . i think if i bring in a hair dryer and put it to the glass this will speed up the process . plz tell me what you think !!!!!!!!!!!!!!

2007-11-27 15:38:27 · 2 answers · asked by james calli 2

ok my science teacher and i have a bet that i cant make drinkable wine in an hr to 30 min . were going to put yest in frute juice and put a balloon over the glass and let it fill up the balloon. as we all know this is LIKE the way they make wine giving more sugar and what not . im just wondering if this can even happen . i think if i bring in a hair dryer and put it to the glass this will speed up the process . plz tell me what you think !!!!!!!!!!!!!!

2007-11-27 15:38:12 · 2 answers · asked by james calli 2

why do sodium and potassium, which belong to the same group in the periodic table, have similar chemical properties?

2007-11-27 15:21:55 · 5 answers · asked by Anonymous

I mean, the theory is that amino acids eventually form together to make DNA, which then evolves into more complex DNA to create life. But how could amino acids form together to make DNA since the cells which make these acids to create DNA is made from the blueprints of DNA itself? This is conflicting so did I get the theory wrong?

Also, I think that there are 20 are so different amino acids, with only a few workable combonations, so if amino acids ever did somehow randomly hook together, the chances of a DNA strand being made is slim... am I right here too or is my thinking flawed?

Thanks please leave an explanation not just a "no" or please confirm if "yes"

2007-11-27 14:50:14 · 3 answers · asked by Benjamin B 1

Consider:
S + O2 --> SO2 delta H = -296 kj/mol

How much heat is evolved, when 275 g sulfur is burned in excess O2?

2007-11-27 14:48:09 · 3 answers · asked by Anonymous

what do the titles
d4, d5, d8, etc stand for and how do you find them??

for example, in my txt book it says that
Cr(H2O)6 (3+) is d5

Thank you!

2007-11-27 14:24:09 · 2 answers · asked by Anonymous

As [Ar] 4s2 3d10 4p3

2007-11-27 14:22:44 · 1 answers · asked by Edward 2

2007-11-27 14:19:47 · 1 answers · asked by Anonymous

it's not for homework but i am trying to get a better idea of it because i don't really understand it. My teacher just taught us it in class today but to get a better idea of it i looked it up online and everything is so detailed.

I just want to know:
- the basic idea
-and how you draw dot structures of molecules or ions using it

2007-11-27 14:09:35 · 1 answers · asked by MusicLuvr 5

2007-11-27 14:07:28 · 2 answers · asked by atljasmine4 1

please add the products and balance it

2007-11-27 14:04:18 · 2 answers · asked by babe g 2

2KClO3 ---> 2KCl + 3O2

How much O2 will be generated in moles beginning with 0.107mol KClO3

2007-11-27 13:57:59 · 1 answers · asked by Kenneth R 1

For 24.15 - 20.32, would you need to round to 4 significant digits, since it becomes a number less than 10?

I know that when you subtract up and down, when no column has both non-significant digits, then you just make it 3.83? No need for four significant figures?

Samem for 22.55 - 20.33? would be just 2.22, and if it was 20.13 - 20.13, it would just be 0.00?

Significant digits are kind of confusing I guess..

Also, for 0.09/ 3.66 x 100%, would this be rounded to something like 2 percent? just 1 significant digit? and why?

2007-11-27 13:55:02 · 2 answers · asked by Anonymous

Because I'm doing my homework, and one of the questions asked us to calculate the pH of H2SO4. The Ka1 of H2SO4 is very large, indicting that it ionizes completely. The answer is pH=0. Does this make sense?

2007-11-27 13:50:19 · 1 answers · asked by Anonymous

Why does the pure solvent shows a horizontal curve when solidfication occurs, but the curves for the solution slopes downward slightly?

2007-11-27 12:45:29 · 3 answers · asked by Rushi P 1

Materials and Methods:
50 paper cups were used for this experiment. 100 milliliters of room temperature water was put in each cup. 10 cups were set aside in 5 groups so that 10 cups were in each group. In the first 10 cups, 25 mL of Wesson vegetables oil was put into the cups. In the next 10 cups, 25 mL (5.07 teaspoons) of Morton salt was put in the cups. 25 mL of Tide laundry detergent was put in the next 10 cups, and 25 mL of Rutter’s 1% low fat milk was put in the next 10 cups. 10 cups with 125 mL of water was then left for the control. These 50 cups were put under 5 lights each with 5 new 60-watt light bulbs. The light was spaced out evenly so that each cup received the same amount of light. Each cup was measured once a day for depth of the substance and the average was found for each group twice a day. The experiment went on for 5 days.

Whould I change anything? My teacher asked how I can I tell that only the water evaporated and not the substances? Any input?

2007-11-27 12:19:35 · 5 answers · asked by fluorine DX4 3

A are found in the nucleus along with the protons.
B occupy the space surrounding the nucleus.
C have a positive charge.
D are attached to the positive charge of neutrons.

2007-11-27 12:10:31 · 9 answers · asked by Anonymous

for an experiment

2007-11-27 12:08:06 · 2 answers · asked by deltalgammaray 1