Chemistry - May 2007

I know it's something that helps keep clothing white, but what kind of chemical IS it? Is it better for the environment? Safer if ingested?

2007-05-01 06:53:35 · 2 answers · asked by Anonymous

PLEASE HELP

2007-05-01 06:50:14 · 1 answers · asked by Anonymous

Which unit of radiationn is frequently used in medicine to describe the amount of tissue damage caused by a radioactive substance?
becquerel
curie
rad
rem

2007-05-01 06:38:16 · 2 answers · asked by nina238321 1

2007-05-01 06:15:54 · 2 answers · asked by Anonymous

2007-05-01 06:04:52 · 2 answers · asked by Shalyn C 2

2007-05-01 06:01:30 · 6 answers · asked by Shalyn C 2

What force would you expect between sodium ions and chloride ions in a crystal of sodium chloride?

2007-05-01 05:56:56 · 4 answers · asked by x.T.x 3

Why there are much higher solubilities of ammonia and hydrogen chloride compared to that of carbon dioxide?What the reason?

2007-05-01 05:55:44 · 2 answers · asked by Anonymous

2007-05-01 05:53:22 · 3 answers · asked by sandysdachshund 3

Confirmation please, Im so insecure

2007-05-01 05:52:57 · 0 answers · asked by some guy 1

2007-05-01 05:28:07 · 6 answers · asked by Mija 1

No atoms are lost from starting material in which kind of polymer?

branched polymer
addition polymer
polyester polymer
vulcanized polymer
condensation polymer

2007-05-01 05:25:16 · 2 answers · asked by Anonymous

2007-05-01 05:15:52 · 3 answers · asked by Anonymous

(1) AgCl(s) + NH3 (aq)

(2) Hg2Cl2(s) + NH3(aq)

& please explain how adding aqueous NH3 to the combined AgCl-Hg2Cl2 precipitate effects the seperation of the two cations.

2007-05-01 05:10:52 · 2 answers · asked by Anonymous

2007-05-01 05:07:30 · 2 answers · asked by Anonymous

A bucket of water, with a lid, decreases in water level to a certain point but then remains at the same water level. Why does the water level remain constant even as the evaporation process continues.

2007-05-01 05:06:49 · 2 answers · asked by Anonymous

1. HNO3 + I2 ----> HIO3 + NO2 + H2O
2. K2Cr2O7 + H2S + H2SO4 ---> Cr2(SO4)3 + S + K2SO4 + H2O

Thanx!

2007-05-01 04:46:05 · 2 answers · asked by shambhalachick 1

I need to know how to solve these problems:

1. Find the pH and pOH for a solution which contains 5.33 grams of HCL dissolved in 2.50 dm^3 of solution.

2 Find the [H+], the pH, and the percent ionization of:

a) 0.025 M solution of HCN, K= 6.2 X 10^-10
(underneath the K is an a or something.. i can't quite read it)

3. Calculate the K(a or something) for a 0.010 M solution of weak acid with pH = 5.3

4. Determine the solubility of Cu3(PO4)2 if its ksp is 1.93 X 10^-37.

The answer I got for #4 was 1.78 X 10^-8

Is that correct?

Any help would be greatly appreciated!

2007-05-01 04:40:56 · 1 answers · asked by myra cambelll 1

SiO2
Co2
H2Se
H2o

2007-05-01 04:34:02 · 1 answers · asked by Anonymous

FeS2 + Na2O2 ------------------> Na2FeO4 + Na2SO4 + Na2O

I can't do the red equation


O2 (-1) -------------->O4(-2)


O2 (-1) -------------->O4(-2)


O2(-1) -------------->O(-2)

2007-05-01 04:28:50 · 1 answers · asked by s_prevent 1

350 mL of 0.10 mol/L solution of magnesium bromide is mixed with a 245.5 mL of barium fluoride solution. Calculate the concentration of the barium fluoride.

is this the correct equation?

2MgBr2+ 2BaF2 --> 2BaBr2+ 2MgF2

thanks in advance!

2007-05-01 04:23:31 · 2 answers · asked by hey!!!! 1

2007-05-01 04:14:37 · 3 answers · asked by Anonymous

2007-05-01 04:02:12 · 7 answers · asked by stace9012003 2

Cu^2+ Pb^2+ Zn^2+
Cu(s) No reaction No reaction No reaction

Pb(s) precipitate no reaction no reaction
of copper

Zn(s) precipitate precipitate no reaction
of copper of lead

1. write balanced equations for any that you observed between solid metals and metal ions in the above info.

2. which metal was oxidized by both of the other two metals?

3. which metal was oxidized by only one of the other two metals?

4. which metal was oxidized by neither of the other metals?

will give 10 points and a 5 star for whoever can answer these questions the best! so please help!!!

2007-05-01 03:54:02 · 1 answers · asked by MEB 2

O2
N2
I2
Ta2
Li2

2007-05-01 03:32:00 · 8 answers · asked by alissa f 1

Pt
Au
Os
Fe
Ru

2007-05-01 03:29:56 · 2 answers · asked by alissa f 1

2007-05-01 03:15:38 · 3 answers · asked by Mija 1

About time-delay grenades and impact grenades.

Thank u!!

2007-05-01 02:35:33 · 1 answers · asked by Anonymous

2007-05-01 01:57:51 · 3 answers · asked by annhall90 1

i need this is this general and critical any ideas and please enter why if u pick steam ???? thanks

2007-05-01 01:39:25 · 9 answers · asked by Anonymous