Chemistry - November 2006

The periodic table is a way to arrange the elements, in order of increasing _________, to show natural repeating patterns such as:

a. The increasing number of valence electrons as you go across each period
b. the decreasing size of the atom as you go across each period
c. the repeating change in reactivity as you go across the chemical families
d. the change from metallic to nonmetallic properties as you go across each period

2006-11-30 07:55:26 · 4 answers · asked by ♥ 6

2006-11-30 07:48:45 · 3 answers · asked by skyler t 2

When i say what chemicals i mean like as far as breaking it down to the periodic table. And as a chemist or thinking as a chemist would how would i explain the reation light or chemicals to develop have of unprocessed film.

2006-11-30 07:45:16 · 2 answers · asked by Raven 1

2006-11-30 07:44:30 · 7 answers · asked by Anonymous

EVA is a type of glue used to stick the layers of a solar panel together. What is it? How does it work and why is it see through, infact - Why is PVA see through?

2006-11-30 07:43:57 · 1 answers · asked by Anonymous

i have homework to do in chem. and i can't figure out the balanced equation for burning oxygen and cellulose. i think the equation starts as O2 + C52H84O22 and i know it equals an unknow amount of CO2 and water. PLEASE HELP!

2006-11-30 07:38:30 · 1 answers · asked by :P 3

It is nearly impossible to find, and I would appreciate some help.

2006-11-30 07:00:46 · 2 answers · asked by therealzs 1

I have a huge problem with static electricity. when i brush my hair it just floats up in the air. even my cat shocks me when i touch her. i know it's caused by friction. i just wonder if anyone might know something i can do to minimize this problem. i can't stand the way it feels !! any help would sure be appreciated. thanks......lightening strikes...again , and again , and again..lol HELP !!!!!!!!!

2006-11-30 06:59:04 · 14 answers · asked by anndee 2

2006-11-30 06:46:32 · 5 answers · asked by dat_boi_u_feelin 1

Ca(OH)2(aq) + HCl(aq) -->




a) Water is a product

b) When balanced the coefficient of HCl(aq) is 2

c) Only ions appear in the net ionic equation

d) OH-(aq) does not appear in the net ionic equation

e) Cl -(aq) does not appear in the net ionic equation



Examples of species are (aq) (s) (l) etc.

2006-11-30 06:22:34 · 2 answers · asked by Anonymous

Acidic drinks like lemonade, fruit drinks, ice teas, sports drinks, soda pop, are now known to be bad for dental enamel, and can eventually cause irreversible damage. What can we add to them to reduce the acidity, without ruining the flavor?

2006-11-30 05:44:05 · 3 answers · asked by Scythian1950 7

2006-11-30 04:37:14 · 8 answers · asked by Donna B 1

i have an alcohol burner for chemistry and it says to use "absolute ethyl alcohol". it also says "This burner will work with any denatured alcohol... there is no reason to buy 100% denatured ethel alcohol."

i used ethyl rubbing alcohol 70%... for some reason it isnt working right, the wick burned for a little while and then died down and went out. does anyone know why? is it because my alcohol wasnt denatured... or because it was only 70%?? please help

2006-11-30 04:15:42 · 4 answers · asked by Anonymous

Whether it be elemental or in a compound, either way.

I've looked into this extensively, and although many sites say that there ARE A FEW commercial suppliers, I cannot find one. It is apparently used on old watch hands. I just think it would be an interesting sample to own...very unique. Thanks for the help.

2006-11-30 03:31:10 · 5 answers · asked by Anonymous

2006-11-30 03:21:02 · 5 answers · asked by Kenneth B 1

2006-11-30 03:16:23 · 1 answers · asked by burningpits 1

2006-11-30 03:10:56 · 6 answers · asked by Anonymous

It is an alpha-emmitter so cannot be detected with Geiger Mueller counter?

2006-11-30 03:10:16 · 7 answers · asked by Anonymous

given that 4g of methane were burnt in 7dm cube oxigen what is the limiting reagent?
if 5dm cube of CO2 were produced what is the yield of the reaction

2006-11-30 02:54:30 · 3 answers · asked by celcia d 1

What is your response to a friend who says that there are no ions whatsoever in a glass of pure water?

Clorox is a laundry bleaching agent used to remove stains from white clothes. Suggest why the name begins with Clor- and ends with -ox.

2006-11-30 02:44:47 · 3 answers · asked by J 1

i want to ask that if sulphuric acid is king of chemical than which is raank (opposite of king) of chemicals

2006-11-30 02:41:27 · 7 answers · asked by mohit_blademaster 1

how many moles of sodium hydroxide are there in 500cm3 of a 1M solution? if 500cm3 of 1M sodium hydroxide is required to neutralise 50ml of a sulphuric acid solution what is the molar concentration of the acid?

2006-11-30 02:29:52 · 4 answers · asked by celcia d 1

Preferably something that will be able to give a ph of 2 at room temperature solution. Debit cards out of bounds atm, so itd have to be in a shop.

2006-11-30 02:19:04 · 9 answers · asked by luke c 1

2006-11-30 01:34:46 · 2 answers · asked by vasu 2

how many grams on NaCI are contained in 350 mL of a 0.416M solution of sodium chloride?

my answer is 8.51g?

2006-11-30 01:34:36 · 2 answers · asked by steven11111958 1

2006-11-30 01:33:24 · 3 answers · asked by vasu 2

a 31.9g sample of HF is dissolved in water to give 2.0x10e2 mL of solution. The concentration of the solution is?

I think it is 8.0M ?

2006-11-30 01:29:23 · 3 answers · asked by steven11111958 1

2006-11-30 01:22:48 · 3 answers · asked by Anonymous

2006-11-30 01:11:23 · 8 answers · asked by Danielle P 1

2006-11-30 01:10:04 · 6 answers · asked by Danielle P 1