Chemistry - December 2006

If fire is made of plasma. The 4th material, where does it come from when it is fire, where does it go when the fire disappears, and does plasma have to be hot to exist? I find this a fascinating material.

2006-12-31 09:31:12 · 9 answers · asked by Anonymous

2006-12-31 09:28:30 · 3 answers · asked by Harrison P 1

2006-12-31 09:14:06 · 2 answers · asked by lilxbluangelz 2

It seems like a colder temperature would slow there growth and if it is too warm, the crystals might melt back to a liquid.

I am growing crystals in a small glass container right now. They are coming along nicely, but I would like them to grow a little faster.

a man who makes his own sugar syrup made me a bottle that he said was made at a hotter temperature and he told me that the crystals would grow faster in it. The crystals in this bottle did grow faster, but the crystals were smaller.

The crystals I like are the big ones that look like diamonds.

I am trying it with a super saturated solution made from adding white refined sugar to boiling water.

2006-12-31 08:42:09 · 4 answers · asked by sugarpacketchad 5

2006-12-31 08:31:09 · 8 answers · asked by thehardtruth101 1

KO2 + H2O -> KOH or also known as
Potassium oxide + water -> Potassium Hydroxide...it is driving me crazy I can't figure it out! Thanks

2006-12-31 08:06:48 · 3 answers · asked by Michelle A 1

What is the pH of a 0.01 molar HF solution (The hydronium ion concentration is 0.01)?
0.01
0.1
2.0
12.0

2006-12-31 07:59:53 · 5 answers · asked by calebs_baby_girl05 1

A pH of 9 is a stronger base than a pH of 8.
true
false


What is the pH of a solution with a 0.007 H3O+ concentration?
2.15
–2.15
7.00
–7.00


What is the pOH in question 11 above?
–7.00
2.15
11.85
–11.85


On the pH scale, which of these listed below is the strongest acid (the most acidic)?
6.0
2.4
3.6
1.1


A crystal of copper sulfate is added to a copper sulfate solution. After 20 minutes, the crystal is observed to be unchanged at the bottom of the solution. On the basis of this observation, the solution is best described as
supersaturated
dilute
saturated
unsaturated

What is the formula of hydroiodic acid?
HIO4
HI
H2
H2IO3

A substance, like water, that can act either as an acid or a base is
polyprotic
neutral
amphoteric
anhydrous

What is the pH of a solution with a hydroxide ion concentration of 0.00200 M? (Hint: Find the pOH using your calculator first, then find the pH).
2.00
11.3
12.0
2.30

2006-12-31 07:58:10 · 2 answers · asked by calebs_baby_girl05 1

1.Arrhenius defined a base as
a.a molecule that will accept an hydroxide ion in solution
b.a molecule that will donate an hydroxide ion in solution
c.a molecule that will accept a hydrogen ion in solution
d.a molecule that will donate a hydrogen ion in solution


2.In the reaction S–2 + H2O → H2S + OH–, the sulfide ion picks up two protons to move it from S–2 to H2S. In this reaction, the sulfide ion acts as a(n) _________.
a.Bronsted/Lowry acid
b.Arrhenius base
c.Bronsted/Lowry base
d.Lewis acid


3.Sulfuric acid is the name of H2S.
true
false


4.The acid name of H3PO4 is ________.
a.hypophosphorous acid
b.perphosphoric acid
c.phosphoric acid
d.phosphorous acid


5.Which of the following is the formula for hydroselenic acid?
a,HSeO4
b.H2SeO3
c.HSe
d.H2Se


6.hich of the following is the formula for a base using the nickel (II) ion?
a.Ni(OH)2
b.NiOH
c.Ni2OH
d.Ni2(OH)2

2006-12-31 07:49:08 · 2 answers · asked by calebs_baby_girl05 1

which element may react chemically by losing electrons from both s and d sublevels?
1.Cl
2.Fe
3.Al
4.Be

2006-12-31 07:02:58 · 6 answers · asked by Jesse C 2

I have a question that I do not how to solve it even with the answer from the solution manual. Can someone please explain to me on how to solve it. Thank You. (Happy New Year!)

Q: An iron ore sample is dissolved in acid and the iron is obtained as Fe2+, which is analyzed by a titration with KMnO4. The titration reaction is:

5Fe^2+ + MnO4^- + 8H^+ ---> 5Fe^3+ + Mn^2+ + 4H2O

It is found that 24.00 ml of 0.0200 M KMnO4 solution is required to react with all the iron in a sample of ore weighing 0.4. What is the percent of iron in the ore?

A: 33.5%

2006-12-31 06:54:25 · 4 answers · asked by asidy 1

I have a question that I do not how to solve it even with the answer from the solution manual. Can someone please explain to me on how to solve it. Thank You. (Happy New Year!)

Q: A 2.00 g mixture of Fe2O3 and impurities having no iron, is analyed as containing 1.25 g of Fe. What is the percent of Fe2O3 in the mixture?
A: 89.3%

2006-12-31 06:37:50 · 1 answers · asked by AUNIDLY 1

2006-12-31 06:36:41 · 7 answers · asked by dkp2k2 2

2006-12-31 06:36:38 · 5 answers · asked by ♥me 4 eva♥ 2

By pH levels of water I mean acid (under 7), neutral (7), and base (above 7). I am doing a science project and I really need help!

2006-12-31 06:27:06 · 4 answers · asked by ♥me 4 eva♥ 2

Which electron configuration represents a transition element?

1)[Ar] 3d5,4s2
2)[Ar] 3d10,4s2,4p6
3)1s2,2s2,2p5
4)[Ne] 3s2

2006-12-31 06:24:18 · 2 answers · asked by Jesse C 2

I was reading an artical about baseball and it said something about an autographed card on clear acetate, but isn't this like a chemistry term or is this another word for like a sticker ? thanks

2006-12-31 06:00:52 · 4 answers · asked by bucos2006 1

2006-12-31 06:00:51 · 1 answers · asked by citichem 1

what are shaped charge explosives made of?

2006-12-31 05:48:42 · 3 answers · asked by ronrow3 1

Which of the following is a temperature dependent concentration unit?
A. Molarity
B. Mole Fraction
C. Weight Percent
D. Molality
E. None of the above

Ok, so I thought that as you heat a certain solute within water, some of the water molecules will evaporate. But that would create a change in everything won't it?
2. Which of the following molecules has the largest bond order?
A. N2
B. O2
C. Br2
D. S8
I know that you have to do the orbital configuration diagram,but this is a multiple choice question and there has to be an easier way to do it.
Which lists the follwing solutions, 1 molal AgBr,1 molal Br2 and 1 molal LiBr in order of decreasing boiling point?
A. AgBr=LiBr, Br2
B.LiBr,Br2,AgBr
C. Br2,AgBr=LiBr
D.LiBr,AgBr=Br2
E. AgBr,LiBr,Br2
So could someone please tell me the answer and how you arrived at that conclusion? Thanks

2006-12-31 05:34:58 · 3 answers · asked by oldegolde2004 3

2006-12-31 05:25:04 · 4 answers · asked by blueispower007 1

2006-12-31 04:48:24 · 7 answers · asked by Anonymous

Please tell me about the theory of elemagnetic induction and also name the person who had a great contribution to it? Also name the scientist who firstly told/discovered this. It is to be included in my science project.

2006-12-31 03:20:32 · 6 answers · asked by Champ 1

Al(NO3)3(aq) + NaOH(aq)

i know it starts by putting the + and - together so you get AlOH+Na(NO3)3 for the second part. but does that mean i replace the original one? > NaOH???

after that how do you balance it and write the ionic equation??

i dont understand this at all. sorry.

2006-12-31 03:04:35 · 7 answers · asked by Anonymous

2006-12-31 02:17:04 · 3 answers · asked by red_0rient 1

i dont understand y is it impossible to locate the position and
velocity of an electron simutaneously....... it seems... well......
i dont know......
i wonder what is this- '' probability''

2006-12-31 02:10:34 · 8 answers · asked by Deranged Soul.. 2

2006-12-31 02:01:34 · 5 answers · asked by parwiz v 1

2006-12-31 01:37:20 · 2 answers · asked by hany_vx 1

it is a question of chemistry

2006-12-31 01:31:12 · 2 answers · asked by ASHUTOSH ASTHANA 1

2006-12-31 01:07:44 · 2 answers · asked by Anonymous