Chemistry - November 2007

PbSO4

Answer Format:


For KMnO4 the correct answer would be +1 +7 -2 for the elements K Mn and O respectivley.


That is, you must type in the oxidation numbers for each element in the compound
(reading from left to right)

Put one and only one space between each oxidation number, and include the sigh + or -,
as in the example answer format above

2007-11-20 15:46:10 · 2 answers · asked by Poland Spring 1

So I'm trying to make crystals with salt in a supersaturated solution. It seems to work, I DON'T boil the water, but for some reason, all the solution does is sinks down to the bottom like a salt dust. What am I doing wrong? Why wont my crystals form?

2007-11-20 15:19:12 · 2 answers · asked by Lalavava 1

i have a project and i need to know if it will i have to turn in background research to my teacher

2007-11-20 15:04:42 · 1 answers · asked by Anonymous

a. 1 gram
b. 10 grams
c. 1 kilogram

2007-11-20 14:53:29 · 6 answers · asked by Anonymous

2007-11-20 14:36:42 · 2 answers · asked by aznboi6623 1

How does deep frying work and why is it a superior cooking method for some foods? From the perspective of chemistry, what is occuring? Ignoring health issues, why fry versus bake, broil or cook?

2007-11-20 14:14:48 · 2 answers · asked by OPM 7

the combination of molasses and yeast causes fermentation; therefore since molasses is composed of the three sugars sucrose, glucose, and fructose it could be assumed that one of the three sugars would ferment with yeast; however, none produce a reaction. Therefore, what is in molasses that causes fermentation with yeast.

2007-11-20 14:04:05 · 4 answers · asked by Annabelle 1

a) Water is not a product

b) When balanced the coefficient of KOH(aq) is 1

c) Only ions appear in the net ionic equation

d) OH−(aq) appears in the net ionic equation

e) K+(aq) appears in the net ionic equation

2007-11-20 13:41:45 · 3 answers · asked by tibsy2007 2

2007-11-20 13:24:36 · 6 answers · asked by sunshine_faith 2

I'm a newbie in chemistry, so could someone state two properties of an element? (real question is: List the first elements of the periodic table. State 2 properties of each elements) but i know how to find the first 18.

Also...

Are the physical properties of the compound sodium chloride (table salt) an average of the properties of the elements it contains? Explain.

I won't playgarise (i hope i spelled that right) and i won't copy exactly what people say. I just need some help with it. My version of help is not just giving me the answer to write down. many thanks

2007-11-20 13:20:17 · 3 answers · asked by Fresh Prince 2

2007-11-20 12:04:23 · 8 answers · asked by ~*_*~i_like_cheesy_pie~*_*~_PIE! 2

2007-11-20 11:37:13 · 4 answers · asked by chargergirl_06 1

2007-11-20 11:29:05 · 1 answers · asked by Mark 2

Any help would be appreciated.

2007-11-20 11:26:13 · 4 answers · asked by Anonymous

I need help!!

2007-11-20 11:21:53 · 1 answers · asked by Anonymous

Pb3(PO4)2
PbSO4
Pb(SO4)2
Cu(NO3)2
BaCO3
KNO3
Zr(NO3)2
NH4NO3

Manganese(VI)Phosphate
Manganese(IV)Sulfate
nickel(II)Carbonate
Nickel(III)Carbonate
Copper(I)Phosphate

Please help....I am struggling in Chemistry

2007-11-20 10:25:59 · 3 answers · asked by Anonymous

What happens to the atoms of the reactants in a chemical reaction?

2007-11-20 10:25:50 · 3 answers · asked by Zayka 1

In the combustion of 250 g of propane with an excess of hydrogen, what volume of carbon dioxide is produced at 290 K and 1.5 atm. Choose from the following possible answers:

11904.5 L
270 L
90 L
404 L

2007-11-20 10:14:31 · 2 answers · asked by Goddess Allure 2

For the ions: N3 - , CO3 (2-), NO3 -, and BF4 -
i need to find out how to find the structures and central atom hybridizations. I am not focusing well right now as I am trying to recover from a virus and all of this is looking Greek to me right now....HELP!

2007-11-20 09:54:20 · 2 answers · asked by Anonymous

calculate the volume of SO2(g) produced when 2.00 liters of o2 react with excess sulfer at constant temperature and pressure.

2007-11-20 09:27:31 · 2 answers · asked by confusedkid 3

Which of the following statements are true for the reaction


Ca(OH)2(aq) + HCl(aq) →



a) CaCl(aq) is a product

b) When balanced the coefficient of HCl(aq) is 3

c) Only ions appear in the net ionic equation

d) Ca(OH)2(aq) appears in the net ionic equation

e) H2O(l) appears in the net ionic equation

2007-11-20 09:22:33 · 2 answers · asked by sovietwarhawk 1

2H2O(l) --> 2H2O(l) + O2(g)

a) how will you determine the mass and number of moles of oxygen produced?

b) how will you determine the volume of oxygen produced?

need help guys!

2007-11-20 08:53:39 · 1 answers · asked by jenny 2

the reaction is C2H6----- C2H4 + H2

2007-11-20 08:50:15 · 2 answers · asked by Anonymous

H2SO4

NaSO3

2007-11-20 08:47:37 · 3 answers · asked by Wayne e 1

the equations are

aluminum chloride plus silver nitrate yields silver chloride and aluminum nitrate.


beryllium hydroxide plus hydrogen nitrate yields beryllium nitrate and water.

If you can figure out how, put the word equations in symbolic form when you post your answer

PLEASE help me slove these!!!

2007-11-20 08:41:48 · 2 answers · asked by Anonymous

mixed 10.0 moles of Ca, which is the limiting reagent?

V2O5 + 5Ca >>>> 2V + 5CaO

Could you please show the steps in your results. (TIA)

2007-11-20 08:21:57 · 2 answers · asked by xxxladyxxx 1

What is the reducing agent and oxidizing ...thanks a bunch:)

2007-11-20 08:15:46 · 1 answers · asked by Anonymous

An antacid tablet requires 25.82 ml of 0.200 M HCl to titrate to its endpoint. What volume in ml of stomach acid can be neutralized by the antacid tablet? Assume the stomach acid as a pH of 1.10.

2007-11-20 08:13:03 · 1 answers · asked by Anonymous

with atomic masses of 10.013 amu and 11.009 amu, respectively. The atomic mass of boron is 10.81 amu (see periodic table). Which isotope of boron is more abundant, boron-10 or boron-11?

Could you please show the steps in your results. (TIA)

2007-11-20 08:11:16 · 5 answers · asked by xxxladyxxx 1

2007-11-20 08:00:40 · 2 answers · asked by Anonymous