Chemistry (Science & Mathematics) - November 2006

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Please help me fill in these two blanks!?

* An electron has the greatest energy in the energy lever n = ___.

* An electron can NOT occur __________ energy levels.

THANK YOU VERY MUCH! =)

2006-11-20 11:09:12 · 1 answers · asked by ♥::♥::♥ 1

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If you had 500 mL of a 20 ppm solution, how would you make 500mL of a 500 ppb solution?

What equation is needed?

2006-11-20 11:03:33 · 3 answers · asked by ? 2

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will a flame burn within a balloon full of helium?

i want to heat a helium balloon to make it even lighter. will a flame burn within a balloon full of helium? i know helium is not flamable, but would a gas like hydrogen from a burner burn within a balloon of helium if oxygen is not present? how can i super heat helium?

2006-11-20 11:02:49 · 6 answers · asked by Anonymous

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which one of each of the following pairs would you expect to have the highest electron affinity?

a) Cl or Cl-
b) Na or K
c) Br or I

2006-11-20 10:59:52 · 2 answers · asked by colt 1

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What do the lines in a line spectrum tell about what is happening in an atom?

2006-11-20 10:59:52 · 2 answers · asked by LOVE♥ 1

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arrange the ions Na+, K+, Cl+, Br- in order of increasing atomic size?

2006-11-20 10:58:33 · 4 answers · asked by colt 1

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chemistry help!!!!!!!! Please!!?

how many electrons can accommodated in
a) the n=4 shell
b) a p(x) orbital

2006-11-20 10:57:23 · 2 answers · asked by colt 1

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Balance these equation please?

C8H18 + O2 yields CO2 + H20

Cu + HNO3 yields Cu (NO3) 2 + NO + H20

2006-11-20 10:44:57 · 3 answers · asked by Traffic 4

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Ice and Salt Burn?

how many have put Ice and Salt on your skin? and does it hurt?

2006-11-20 10:38:02 · 2 answers · asked by cj 1

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What is the difference between atoms and ions?

What makes them diff. from each other???

2006-11-20 10:28:17 · 3 answers · asked by Aeropostale' 2

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help!!!!!!!!!?

megnetite and hematite are compunds made up of the same elemnts but their properties are not.Why?

2006-11-20 10:17:59 · 2 answers · asked by sana_ahmad75 1

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what and where is the "ring of fire"?

where is it and what is it

2006-11-20 10:13:48 · 10 answers · asked by Johnny m 1

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I've always been curious.?

Why does my glass of ice water sweat? Does it have to do with water vapor in the air? It has always been something that has been interesting to me...
Be as specific as possible, I am good at understanding scientific concepts.

2006-11-20 10:07:20 · 4 answers · asked by toothfairy 3

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can someone help me please!?

hi, i just need help with some chemistry problems...I've been working so hard to try to understand on how to do these problems and its just not clicking so if you could possibly answer them and explain how you do them please!!! and please use terms that a young child can understand because thats how i am when it comes to chemistry! Thanks!

1.How many grams of hydrogen are produced by the action of hydrochloric acid on 50 grams of zinc?

2.How many grams of copper oxide may be reduced by 10 grams of hydrogen?

3.How many grams of sodium chloride are required to react with 196 grams of H2SO4?

4.How many grams of mercuric oxide are needed to produce 100 liters of O2?

5.How many grams of zinc are needed to produce 100 liters of hydrogen by acid replacement?

6.How many liters of hydrogen are needed to reduce 120 grams of copper oxide?

7.How many liters of oxygen may be obtained by electrolysis of 900 grams