Chemistry - September 2006

2006-09-25 17:09:28 · 12 answers · asked by suseendar 1

Most of the other elements found in air are absorbed while inhaling. Argon stays at the same percentage. I was wondering why this was.

2006-09-25 16:42:58 · 7 answers · asked by clydesofmdgets 1

My calculation of Avogadro's number is 1.7 x 10 to the power of 70
and Avogadro's number is 6.0225 x 10 to the power of 23. I want to know if my result is acceptable.

2006-09-25 16:38:22 · 3 answers · asked by nedjine05 1

2006-09-25 16:24:34 · 7 answers · asked by Anonymous

If you take a bottle/jar/whatever of hydrogen and open it inside, will it start to rain? 2 Hydrogen molecules and 1 Oxygen molecule make water, so won't releasing hydrogen into the air, where there is oxygen, create water/rain? If not, then why?

2006-09-25 16:18:47 · 3 answers · asked by Asterisk_Love♥ 4

2006-09-25 16:12:29 · 2 answers · asked by mag c 1

The hydride ion, H– reacts with water to yield _____.
A) O2
B) H2O2
C) H2
D) H2 and O2

I read that they react to give off H2 and OH- ...so C?

2006-09-25 16:08:46 · 2 answers · asked by axcryingxshame 1

its German... Chemistry...
see http://de.wikipedia.org/wiki/Verd%C3%BCnnungsreihe

2006-09-25 16:03:42 · 4 answers · asked by alx 1

An example of a Lewis acid that is not Brønsted acid is _____.
A) SO2
B) CH3COOH
C) HIO4
D) HNO3

i think its A, because A isnt a bronsted because it cant donate a proton?

2006-09-25 15:58:24 · 2 answers · asked by axcryingxshame 1

The correct order of Lewis acid strength is _____.
A) BCl3 > BF3
B) Fe3+ < Fe2+
C) Ag > Ag+
D) BF3 > BCl3

2006-09-25 15:49:05 · 1 answers · asked by axcryingxshame 1

I need to reasons please someone help me

2006-09-25 15:38:50 · 3 answers · asked by the one 2

where are they at

2006-09-25 15:37:49 · 3 answers · asked by hot hot heat 1

2006-09-25 15:31:38 · 4 answers · asked by Shagufta M 1

2006-09-25 15:20:57 · 5 answers · asked by paranoid 2

2006-09-25 15:17:27 · 6 answers · asked by ureverydayfetish 2

2006-09-25 15:07:07 · 3 answers · asked by nypd1234 2

1) KMnO4 + MnCl2 + KOH ---> MnO2 + KCl + H20

2) K2S3O6 + KClO + KOH ---> K2SO4 + KCl + H20

Balance each using half reaction method...
Please show all the steps...

2006-09-25 15:00:57 · 3 answers · asked by Anonymous

2006-09-25 14:42:28 · 3 answers · asked by mag c 1

(silicon dioxide as thickening agent in ultrasound transmission gel)

2006-09-25 14:32:31 · 2 answers · asked by M.D. Nagarajan 1

for the formula

Triangle Q = m, x Triangle T c C

what is the unit being express by/in Q?

2006-09-25 14:29:51 · 2 answers · asked by Lisa 1

do they have the same characteristics; composition, tensile strength, crystal arrangement

2006-09-25 14:21:49 · 10 answers · asked by zingowner 2

2006-09-25 14:06:00 · 7 answers · asked by VinRock 1

Which of these elements are most likely to have properties similar to those of chlorine? Why?
a. Boron
b. Hydrogen
c. Nitrogen
d. Oxygen
e. Silicon

2006-09-25 13:53:51 · 6 answers · asked by joecool148192 1

The question is:

"To raise the temperature of a mass of water from 25.0 degrees C tp 50.0 degrees C requires 7.5 kcal. Calculate the mass of water in grams. (specifric heat of water= 1.0 cal/ (g) (degrees C)

The formula I got was

Q/ ΔT x C=M

However, the answer is incorrect. Can someone please explain and demonstrate how to solve this problem?

Thanks in advance.

2006-09-25 13:50:29 · 2 answers · asked by mbtafan 3

an organic chemistry student tries to synthesize an allotrope of carbon in which 6 carbon atoms form a single ring. the molecular formula for this compound would be C6. The student was unsuccessful. Why?

2006-09-25 13:17:12 · 4 answers · asked by Anonymous

The dibromide is completely converted to the dichloride when it is heated in a stream of chlorine according to the equation

XBr2 + Cl2 --> XCl2 + Br2

When 1.500g of XBr2 is treated, 0.890g of XCl2 results.

(a) Calculate the atomic mass of the element X.

(Br2 = 159.8 grams/mol,
Cl2 = 70.906 grams/mol)

2006-09-25 13:04:41 · 1 answers · asked by Phu N 2

66.638%?
P4 + 5O2 + 6H2O ----> 4H3 PO4

2006-09-25 13:02:32 · 1 answers · asked by ballinkickz 1

Write balanced net ionic equations for reactions that produced a precipitate containing the magnesium ion (Mg2+)
I have Hydroxide (OH^1-), Carbonate (CO3^2-) and Phosphate (PO4^3-)
i think the first is MgOH2
i dont know the carbonate or phosphate one. help please?

2006-09-25 12:35:52 · 2 answers · asked by No Know 4

metric system of measurement??????????????...

convert 132 pound to kilograms


how mant litres in a 10.0 ogallon fish tank?

how many invhes in 0.75 meter desk?

how many grams does a 0.50 pound rock weigh?





CAN U PLEASE SOLVE IT?????????

2006-09-25 12:33:01 · 7 answers · asked by Anonymous

is mouse wash a base or acid is it bery acidic if acid or very base if it is a base

2006-09-25 12:29:46 · 4 answers · asked by Anonymous