Chemistry - November 2006

what f any, relationshp is there between the atomic radius, first ionization energy, and reactivity for the alkali metals?

2006-11-29 10:02:22 · 2 answers · asked by J 1

2006-11-29 10:01:54 · 4 answers · asked by Anonymous

2006-11-29 09:40:58 · 1 answers · asked by Breanna S 1

How do you solve the following?

How many moles are in 22grams of argon?
How many grams are in 238 moles of arsenic?
How many moles are in 98.3 grams of Al(OH)3

2006-11-29 09:37:00 · 1 answers · asked by D M 1

how does ice save oranges? (actually... how does spraying oranges with water right before freezing save them?)

2006-11-29 09:31:41 · 3 answers · asked by dreamer 2

it says to name the following compounds...
H3PO4
Fe(C2H302)3

how in the wolrd do i even begin this THING? im so confused that its not even funny, and all the sites Ive read doesnt explain good enough. Thank you

2006-11-29 09:30:56 · 2 answers · asked by Curious10106 2

Fe2O3(s) + CO(g)----> Fe(l) + CO2(g)
How many grams of Fe2O3(s) will be required to produce 5.90 moles of Fe(l)?balance the equation first

2006-11-29 09:25:37 · 1 answers · asked by Anonymous

BaSO4 precipitates out.
Calculate the percent yield (%) if 12.775 g of BaSO4 precipitates
when 1.350 L of 0.0600 M BaI2 and 1.180 L of 0.0572 M MgSO4 (aq) are mixed.

2006-11-29 09:20:21 · 1 answers · asked by g G 1

A student prepares a solution by dissolving 3.75 g of KOH in enough water to make 250. mL of solution.
The student then transfers 27.0 mL of this solution into a 100. mL volumetric flask. Water is then added
up to the 100. mL mark.

2006-11-29 09:19:04 · 1 answers · asked by g G 1

2006-11-29 08:55:41 · 2 answers · asked by disgruntled_goat_04 1

2006-11-29 08:54:20 · 5 answers · asked by Anonymous

How many molecules of CaCl2 are present in 6.45 g sample of CaCl2?

2006-11-29 08:40:08 · 6 answers · asked by Felicia 4

LOL.

I am looking for one of those lights that shows body fluids such as blood and such. I think it is an ultraviolet light or something. Where do I find one and how much do they run?

2006-11-29 08:38:39 · 6 answers · asked by Chrisy 2

2006-11-29 08:37:44 · 5 answers · asked by Anonymous

I am a little confused as to how toxic is mercury ? I am interested in a factual answer to this question as I have heard of mad people snorting mercury and handling mercury and those people are still alive, where as mercury is always described as being a very toxic substance.
http://www.zyra.org.uk/mercury3.htm
This website shows someone holding mercury in the palm of his hand where as other websites says that only a very small amout of mercury like a few small drops is enough to kill you.
Please can you give sensable answer to this question.

2006-11-29 08:32:01 · 17 answers · asked by Halucinagenic 2

Hypothetical question

2006-11-29 08:28:06 · 4 answers · asked by Anonymous

Here's the question:
"Certain chemicals give off colors to a flame.By comparing the color of the unknown to the solutions,___________ was found to be __________."

Help!!

2006-11-29 08:23:58 · 2 answers · asked by Angel 1

what are the products?
SiH4+O2-->? im guessing its H2O and SiO3?

what about the catalytic decomposition of hydrogen peroxide?
((you dont kno what the catalyst is))
H2O2-->H2+O2?

2006-11-29 08:22:05 · 2 answers · asked by Anonymous

2006-11-29 08:18:30 · 2 answers · asked by razma r 1

2006-11-29 08:11:53 · 8 answers · asked by a v 1

I want to ask If an element have:
Melting point:3000 degree
Boiling point:4500 degree
Soluble in water: no
Cond solid: yes
cond in H2O sol: no
cond malten: yes

Then what is its bonding?
and example for this element

Moreover how can I find the answer?
thanks a lot.

2006-11-29 08:11:43 · 6 answers · asked by moon_about_masa 1

calcium hydroxide reacts with phosphoric acid to produce water and calcium phosphate.

I think it would be like

Ca(OH)2 + H3PO4 = H2O + Ca3(PO4)2

But then i don't know how to balnce it beaciuse i cant find any numbers that could work, unless i got my equation wrong

2006-11-29 08:02:55 · 2 answers · asked by hahahatso 1

2006-11-29 07:05:47 · 11 answers · asked by Lyndon 1

2006-11-29 07:00:01 · 3 answers · asked by miss_cutie601 1

A reaction measured in a calorimeter with a heat capacity of 1.50 J·°C-1 caused the temperature of the calorimeter to increase by 26.6 °C. How much heat was released by the reaction?

2006-11-29 06:56:04 · 3 answers · asked by Anonymous

What is the de Broglie equation predicts the wavelength (in M) of a proton moving at 1000. m/s ?

2006-11-29 06:55:00 · 1 answers · asked by Anonymous

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of those waves.

2006-11-29 06:53:39 · 4 answers · asked by Anonymous

What happens when you mix a spoonful of baking soda with a glass of vinegar?

2006-11-29 06:48:35 · 3 answers · asked by Moonfairy 2

2006-11-29 06:48:19 · 8 answers · asked by chelsi_brignac 1

H3PO4(aq) + Mn(OH)2(s)-->Mn3(PO4)2(s) + H2O(l)

2006-11-29 06:46:22 · 1 answers · asked by Ozzie 1