Science & Mathematics - 31 December 2006

2006-12-31 08:10:29 · 10 answers · asked by Noonie 1 in Mathematics

2006-12-31 08:08:43 · 2 answers · asked by Lidie C 1 in Mathematics

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 in Chemistry

2006-12-31 08:05:12 · 6 answers · asked by • LeeYo • 6 in Other - Science

If I was born on 10/06/92 and you where born on 10/15/86 how far are apart would we be?

2006-12-31 08:03:47 · 12 answers · asked by Anonymous in Mathematics

2006-12-31 08:03:29 · 6 answers · asked by Anonymous in Mathematics

2006-12-31 08:03:14 · 6 answers · asked by Anonymous in Mathematics

2006-12-31 08:01:16 · 6 answers · asked by porcha b 1 in Mathematics

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 in Chemistry

thats it

2006-12-31 07:58:38 · 2 answers · asked by briri123 1 in Physics

2006-12-31 07:58:19 · 4 answers · asked by TJ 1 in Other - Science

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 in Chemistry

2006-12-31 07:53:55 · 3 answers · asked by Anonymous in Mathematics

2006-12-31 07:51:06 · 5 answers · asked by jay5_everett 1 in Engineering

Usually, we would have snow at this time in year, but where has it gone & when will in snow again?

2006-12-31 07:50:07 · 19 answers · asked by CC 3 in Weather

2006-12-31 07:49:57 · 7 answers · asked by emerydrame 1 in Mathematics

2006-12-31 07:49:16 · 6 answers · asked by Arnold M 1 in Biology

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 in Chemistry

Good answer please, must porvide clear and concise facts on why this is the case.

The best answer will be choosen within 4 hours.

2006-12-31 07:47:03 · 19 answers · asked by Anonymous in Physics

i keep getting confused with this one. i was thinking that it can't be very thin... so maybe a stratified-type. But which one?

2006-12-31 07:45:55 · 3 answers · asked by giselle 2 in Biology

2006-12-31 07:44:06 · 7 answers · asked by THANK YOU FOR THE VENOM 1 in Zoology

If a man of asian origin who has always had only black eyes in the family for generations marries a white woman who is blue eyed could their child be blue eyed? I heard blue is a recessive gene and for blue eyes both parents need to have blue alleles. Is that so?

2006-12-31 07:43:10 · 13 answers · asked by insp.clouseau 2 in Biology

what do weds use at weddings? what can they do to reduce global warming?

2006-12-31 07:38:53 · 6 answers · asked by noble a 1 in Earth Sciences & Geology

2006-12-31 07:37:00 · 15 answers · asked by quattrothedog 2 in Weather

Is it possible to control the amount of static electricity in your body? As in centering it in one certain spot through a certain type of concentration or item?

2006-12-31 07:36:07 · 8 answers · asked by Anonymous in Other - Science

And are there any other things involved? I'm talking about things like a person "walking" on water and cars driving on top of a large mass of water. I'm sure theres some sort of equation for this. This has nothing to do with religion, just scientific curiousity.

2006-12-31 07:33:54 · 8 answers · asked by Marcus 2 in Physics

2006-12-31 07:32:56 · 1 answers · asked by briri123 1 in Other - Science

2006-12-31 07:30:41 · 6 answers · asked by emerydrame 1 in Mathematics

2006-12-31 07:24:38 · 3 answers · asked by Anonymous in Medicine

When I grew up we had to do our own homework.

2006-12-31 07:21:23 · 10 answers · asked by Anonymous in Mathematics