Chemistry - September 2007

Its urjent,,, plz explain that answar ,, urjent.

2007-09-15 03:29:09 · 1 answers · asked by ANUJIT ROY 1

Silver iodide powder has been used as an antiseptic and as an agent to seed clouds for rain. Silver oxidide is 45.9% silver by mass. If u seperate a 50-g sample of silver iodide into its element,silver and iodine, how much silver would u have?

2007-09-15 03:01:10 · 4 answers · asked by Anonymous

2007-09-15 01:02:42 · 1 answers · asked by Anonymous

Using the science stuff like bunsen burner, gauze, beacker, tripod ect.

2007-09-14 23:57:22 · 12 answers · asked by Anonymous

2007-09-14 23:16:34 · 6 answers · asked by santhosh m 1

what are their values?

2007-09-14 23:08:10 · 4 answers · asked by opm 1

2007-09-14 23:00:38 · 5 answers · asked by micpiz25 1

Name each of the following compounds.
(a) NaOCl

(b) Li3PO4

(c) NaClO2

(d) NaNO2

2007-09-14 21:47:56 · 3 answers · asked by JAVIER R 1

(a) FeBr3

(b) FeCl2

(c) CoO

(d) Hg2O

2007-09-14 21:46:32 · 3 answers · asked by JAVIER R 1

2007-09-14 21:06:39 · 5 answers · asked by Hector R 1

chemistry

2007-09-14 20:31:27 · 4 answers · asked by dk 1

Chemical of water is h2o.H(hydrogen can be burnt easily).O(oxygen are needed for burning).Why these two chemical which can burnt easily when they mixed up, they can't burnt?

2007-09-14 19:51:32 · 15 answers · asked by Anonymous

i think i know how to do this problem but i dont know how to do the conversion..
calculate the frequency of a photon with a wavelength of 6570 A

2007-09-14 18:32:35 · 2 answers · asked by chimstr 1

All help will be much appreciated!!! but please dumb it down for me :) Thanks!!!

2007-09-14 18:13:10 · 4 answers · asked by Anonymous

(14.3(+and- 0.2)-11.6(+ and - 0.2) X 0.050 (+ and - 0.001)/ (820 (+ and - 10) + 1030 (+ and - 5)) X 42.3 (+ and - 0.4) = 1.725 (+ and - ?) X 10-6"

2007-09-14 18:04:59 · 2 answers · asked by scorrea54 1

two barrels of wine were analyzed for their alcohol content in order to determine whether they were from different sources. one the basis of 6 analyses, the average content of the 1st barrelwas established to be 12.61% ethanol. 4 analysis of the 2nd barell gave a mean of 12.53% alcohol. Together the ten analysis yeilded a pooled value of s+0.070%. Do the data indicate a difference between the wines at the 95% confidence level?

values of t for various levels of probability:
deg of freedom: 3 4 5 6
95% 3.18 2.78 2.57 2.45

2007-09-14 18:03:50 · 1 answers · asked by scorrea54 1

The mass of a piece of iron is 1.62 g. If the iron is exposed to oxygen under conditions in which oxygen combines with all of the iron to form pure oxide of iron, the final mass increased to 2.31 g.
Find the empirical formula.

2007-09-14 17:57:17 · 2 answers · asked by gurlygal 1

convert 20kg to grams

convert 400mL to L

convert 12m to cm

convert 3.5 hours to seconds

also,

put 0.000,0067 kg to a scientific notation

2007-09-14 17:43:12 · 5 answers · asked by ALESANA 7

2007-09-14 17:22:48 · 5 answers · asked by Anonymous

2007-09-14 17:07:26 · 4 answers · asked by Anonymous

a) 9.00
b) 5.00
c) > 9.00
d) < 5.00

2007-09-14 17:05:57 · 2 answers · asked by Tonnie 1

2007-09-14 16:27:48 · 2 answers · asked by daddy 1

I'm kinda new to the whole Yahoo Ask thing, but I'd gladly appreciate anyone who can help me with this question. And if at all possible, I would like to know how get started with it please.

Oh and H2SO4 is sulfuric acid

2007-09-14 14:16:23 · 2 answers · asked by j0shua0h 1

What is the purpose of the periodic table of elements? Thanks!

2007-09-14 12:37:14 · 4 answers · asked by Anonymous 1

Find the Density of the water. Density = Mass/VolumeIn other words, how much matter is crammed into a given space Here is some information you will need. The data has been collected for you.

Empty graduated cylinder 41.6 grams
Graduated cylinder containing 82 ml of water 123.1 grams
Mass of the water ? grams
Density of the water ? g/mL

2007-09-14 11:15:15 · 4 answers · asked by Pratikshya M 1

A sodium hydrogen carbonate-sodium carbonate buffer is to be prepared with pH of 9.40.
a) What must the [HCO_3^-]/[CO3^2-]
b) How many moles of sodium hydrogen carbonate must be added to a liter of 0.225M Na2HCO3 to give this pH?(assume no volume change)

2007-09-14 10:23:03 · 1 answers · asked by Anonymous

2007-09-14 09:39:51 · 7 answers · asked by Anonymous

2007-09-14 08:27:10 · 3 answers · asked by - 3

I swallowed a very samll amount of hydrochloric acid about 40 mins ago, it was like, a drop of it.
now my throat feels copnstrcited and flushed.

What shoudl i do

2007-09-14 07:31:20 · 17 answers · asked by dobby h 1

1. name the 3 types of particles found in atoms.

2. which two particles are only found in the nucleus of an atom?

3. many everyday substances, such as oxygen, gold and aluminium, are elements. other substances such as water and sugar are not. explain what this means in terms of the atoms in them.

2007-09-14 05:12:16 · 4 answers · asked by LAURaaa 1