Chemistry - September 2006

How much oxygen would be needed to react with a 0.7986 gram piece of magnesium ribbon?

So, I know that the empirical formula is MgO. That is, 1 atom of Mg for every atom of O. I am brain dead right now.... please help me before I scream!!!

2006-09-17 16:38:56 · 7 answers · asked by Anonymous

what is the reaction between triethanolamine and stearic acid,which would lead to triethanolammonium stearate?

2006-09-17 16:07:57 · 4 answers · asked by theowlery_hedwig 2

2006-09-17 16:05:29 · 4 answers · asked by NoNome 2

2006-09-17 16:01:32 · 4 answers · asked by sara a 1

The problem given is:
You have ben given 4 black pens. Design and carry out an experiment thatwill determine if the dye used in each pen is a compound or a mixture. You will need to provide evidence to justify your conclusions.

2006-09-17 15:22:24 · 4 answers · asked by Anonymous

2006-09-17 15:20:28 · 3 answers · asked by samantha s 1

A 600.00 mL bottle of mathanol is sold in a discount store as a gasoline additive to prevent freezing for $0.39. the density of mathaol is .79 g/cm^3 at room temp. What is the price of methanol per kilogram?

i really dont understand it and i just need to see how it is done step by step once to see how to do my other problems!! thank you!

2006-09-17 15:18:44 · 6 answers · asked by abbs 2

What is the temperature that it burns? Not the temp to where you can ignite it but when the reaction occurs.

2006-09-17 15:03:05 · 3 answers · asked by jesse6317 2

There is a kind of lipstick called magic lipstick claimed that its color will change with your body temprature. Is there any special chemical inside?

2006-09-17 14:59:15 · 1 answers · asked by travelpa 7

2006-09-17 14:51:27 · 2 answers · asked by houstonman20042002 1

4 school im writing a essay n i left my notes at skool i need the 7 forms of energy pleeezse

2006-09-17 14:41:01 · 8 answers · asked by Alex L 1

can u please tell me in the easiest way on how to balance a chemical equation.
our professor in chemistry already teach that, but still i feel difficult
can u please give me the easiest way and give at least 5 examples to balance a chemical equation?
please/

2006-09-17 14:15:53 · 3 answers · asked by steph11_cute 1

2006-09-17 14:12:31 · 7 answers · asked by steph11_cute 1

Answer which ever ones you can, but be sure to put the number of which question you're answering. thanks!! :)

1) How does the concept of floatation relate to the concept of density?

2)Identify 2 applications and examples of where floatation is used.

3)Does floatation only relate to liquids and solids??

2006-09-17 14:07:21 · 2 answers · asked by Anonymous

Calculate the number of P4 Molecules that can form 2.5 g of Ca3(PO4)2. (Show How You Got it)

2006-09-17 13:51:44 · 2 answers · asked by ==== 3

thanks :)

2006-09-17 13:09:44 · 2 answers · asked by Anonymous

The chemical composition of a bubble that is made of water and soup.

2006-09-17 13:02:23 · 3 answers · asked by Anonymous

Density 1:

Pipet 25.00 mL of a salt solution into a flask to measure the density of the salt solution.

Density 2:
Measure between 9-10 mL of a salt solution into a graduated cylinder to measure the density of the salt solution.

Which density measurement should be more precise?

2006-09-17 12:56:39 · 5 answers · asked by Anonymous

How do you find density, what is its formula, ramifications and units?

thanks :)

2006-09-17 12:30:40 · 3 answers · asked by Anonymous

it's for my chemistry lab and I don't know the answer!!!!!!!

2006-09-17 12:25:13 · 6 answers · asked by Anonymous

i know that if i were to times the atomic mass by 6.02*10^23 that it will give me a fairly large number
how do i write that number?

2006-09-17 12:05:22 · 9 answers · asked by Simply Me 5

I Need To Do A Science Fair Project AN Easy One!! I Dont Feel Like Making One So Can You Guys Help Me On Making One? Please! It's Just So I Can Pass The Class.

2006-09-17 11:46:04 · 6 answers · asked by Yesenia 1

2006-09-17 11:44:24 · 5 answers · asked by Anonymous

2006-09-17 10:01:43 · 6 answers · asked by misty 1

2006-09-17 09:48:28 · 12 answers · asked by anthony r 1

2006-09-17 09:05:16 · 12 answers · asked by jboxman7 2

2006-09-17 08:42:17 · 21 answers · asked by esneddon@btinternet.com 1

2006-09-17 08:27:30 · 14 answers · asked by Archie 3

2006-09-17 08:18:19 · 7 answers · asked by ryantjones 1

Please explain it to a non-chemist.

2006-09-17 08:14:43 · 16 answers · asked by Sattva 2