Chemistry - December 2007

given the following information:
1) I used 9.586g of steel
2) The specific heat for the steel is 0.447 joules/g deg. C
3) I put the steel in 65 ml of water
4) the temperature of the water started at 22 deg C and ended at 41 deg C
5) the only equation that I have is calorie= mass X change in temperature X (cal/ g degrees C)
6) 4.18 joules = one calorie.

2007-12-17 08:18:00 · 1 answers · asked by Luke H. 1

hello! :)

Can anyone tell me why phosphorus trichloride has a low melting point ( - 92°C ) a boiling point ( 76°C ) ?

Thanxx a lot!! :D

2007-12-17 08:17:49 · 2 answers · asked by in luv with rock^^ 1

1.What is the effect of a base on an acid?
2.What is the effect of an acid on a base?

thanks

2007-12-17 08:10:23 · 2 answers · asked by Anonymous

thank you for you help!

2007-12-17 08:07:11 · 2 answers · asked by wildstudent 1

do you know about a lead?

if you are good on it, could you answer these questions?

1.what toys contain lead?
2.lead's history
3.lead's chem/physical proportion
4.why is Pb toxic?
5.Summarize: Advice Santa why he should/should not give their toys to the children?

2007-12-17 07:59:11 · 1 answers · asked by Anonymous

OK I'm doing a research project and I need some info. I'm doing my project on the element "Sodium". Who discovered this element and when? Where and How was it discovered and is it an old element? If it is an old element please tell me some information about it a long time ago. And also is there any other uses besides salt? Thanks!! Please answer!! Don't answer one part of it though, try and answer the whole thing it's really important!!!

-samantha

2007-12-17 07:52:25 · 5 answers · asked by Sam 2

I'm revising for a chamistry test but what is the mole of a subtance, what is it used for, and how do I work it out?

2007-12-17 07:40:26 · 14 answers · asked by Anonymous

2007-12-17 07:23:19 · 4 answers · asked by Anonymous

2007-12-17 07:14:08 · 6 answers · asked by Anonymous

2007-12-17 07:12:08 · 2 answers · asked by badboyzpet 1

i need help balancing this chemical equation

C3H8+O2----> CO2+H2O

2007-12-17 07:02:13 · 2 answers · asked by Anonymous

As our school project, my friends and i are preparing acetanilide. Could you tell me if we have to take some extra precaution with the product or if it's absolutely safe ?

2007-12-17 06:58:24 · 4 answers · asked by w4c~m3-5un 3

why is it necessary to let the evaporating dish cool before measuring the mass.
why should the mass of the evaporating dish be measured immediately after it cools, and not later?
thanks=)

2007-12-17 06:44:55 · 1 answers · asked by Anonymous

I just did a lab to find the rate of reaction of iron and iodine (order of reaction, etc.). However, how would I use the Beer-Lambert law and a standard iodine solution to calculate "k"?

2007-12-17 06:26:15 · 2 answers · asked by Anonymous

dispersion
dipole
ionic

2007-12-17 05:43:22 · 1 answers · asked by V 1

A) The total amount of entropy in the universe is increasing.

B) The total amount of energy in the universe is increasing.

C) The total amount of matter in the universe is constant.

D) The total amount of energy in the universe is constant.

2007-12-17 05:36:48 · 3 answers · asked by JoJo 2

A) heat.

B) electricity.

C) radioactivity.

D) entropy.

2007-12-17 05:27:06 · 3 answers · asked by JoJo 2

A) Energy cannot be transformed from one type to another (e.g., potential to kinetic).

B) Energy can be transformed form one type to another (e.g., potential to kinetic).

C) Energy can be created spontaneously from nothing.

D) Matter can be transformed into energy in a chemical reaction.

2007-12-17 05:11:29 · 2 answers · asked by JoJo 2

Note it can be any type of paper

2007-12-17 05:01:53 · 3 answers · asked by Debster2 6

Like I said, no units are given. It says it's going by the size of the "relative IP's", which I have no clue what that means exactly. We are supposed to provide answers for the elements X and Y. I'd appreciate any help!

X - 350 > 790 > 1250 > 14400 > 19250 > 3200
Y - 200 > 450 > 800 > 12500 > 15750 > 28500

2007-12-17 04:53:16 · 2 answers · asked by Metisnyx 2

lol.

2007-12-17 04:52:55 · 1 answers · asked by Anonymous

has the same number of fluorine atoms as 25.0 g of oxygen difluoride, OF2?

2007-12-17 04:39:01 · 4 answers · asked by Iny643 1

2007-12-17 03:39:52 · 6 answers · asked by unique 1

And also how do u solve for Molar mass using the ideal gas laws?

2007-12-17 02:12:54 · 2 answers · asked by Anonymous

How would I equate the ff inc. their products:

1) KHP(aq) + NaOH -->
2) CH3COOH(aq) + NaOH -->
3) H2CO3(aq) + NaOH -->

*all numbers above are subscripts

Thank you very much!!

2007-12-17 01:08:48 · 2 answers · asked by bluespark 2

2007-12-17 00:52:12 · 1 answers · asked by James 2

2007-12-17 00:30:53 · 3 answers · asked by kiwi_frost 1

Clear liquid on top, with brown particulate matter on the bottom. Scientifically speaking, what is going on, and what is the solid matter that precipitates out?

I don't think I'm going to have any more Coca Cola!

2007-12-16 23:56:54 · 18 answers · asked by ♦♦pixiechix♦♦ 5

Why all metals are luster? I read some information before which said metals are luster because of their electrons sea. Is that right? If so, who can tell me the details about it.

2007-12-16 23:38:39 · 4 answers · asked by Anonymous

2007-12-16 22:54:19 · 1 answers · asked by St Lusakan 3