Chemistry - July 2007

I would like to know how to get science and math symbols such as "delta" and "degree" so I can use them in my answers here. Is there anyone out there who can explain this to me in very simple terms? My computer IQ is very low.

2007-07-11 13:34:28 · 5 answers · asked by physandchemteach 7

a) 1.08 atm to Torr
b) 693 Torr to atm
c) 218kPa to atm

2007-07-11 13:24:11 · 3 answers · asked by Heather D 1

If the heat capacity of an unknown substance is 0.423 J/g oC. how much heat is required to raise the temperature of 15 grams of this substance from 25 degrees C to 50 degrees C.

2007-07-11 13:18:42 · 2 answers · asked by Heather D 1

A sample of gas occupies 9.25L at a pressure of 832 Torr. Maintaining a constant temperature (as well as a constant amount of gas), determine the pressure of the gas if the volume is expanded to 11.75L.

2007-07-11 13:12:58 · 2 answers · asked by Heather D 1

2007-07-11 12:57:06 · 4 answers · asked by rob3rticusk 2

4.17 grams
5.21 grams
10.4 grams
20.8 grams

2007-07-11 11:51:45 · 5 answers · asked by Anonymous

0.1M NaCl
0.1M BaCl2
0.1M AlCl3
all have the same freezing point

2007-07-11 11:49:39 · 5 answers · asked by Anonymous

97 ppm
150 ppm
232 ppm
300 ppm

2007-07-11 11:46:13 · 3 answers · asked by Anonymous

CO2
HF
both (a) and (b)
neither of them

2007-07-11 11:44:26 · 3 answers · asked by Anonymous

the solution is a nonelectrolyte
glucose dissolves because it can hydrogen bond with water
both (a) and (b) are true
both (a) and (b) are false

2007-07-11 11:43:25 · 3 answers · asked by Anonymous

0.33 moles
0.50 moles
0.67moles
1.0 moles

2007-07-11 11:40:48 · 4 answers · asked by Anonymous

pressure has virtually no effect on the solubility of liquids or solids
solubility always decreases as pressure decreases
solubility always increases as pressure decreases
solubility usually decreases as pressure decreases

2007-07-11 11:38:34 · 6 answers · asked by Anonymous

well , is there any real way of getting rid of water ??

2007-07-11 11:37:40 · 19 answers · asked by cliff6267 1

the anode is the positive electrode
the cathode is the negative electrode
both (a) and (b) are true
both (a) and (b) are false

2007-07-11 11:37:07 · 3 answers · asked by Anonymous

Law of Conservation of Energy
Law of Conservation of Mass
Law of Definite Composition
none, all of the above laws are applicable

2007-07-11 11:33:27 · 2 answers · asked by Anonymous

can not be determined without any other measurements?



%(w/w)
%(w/v)
%(v/v)
all of these

2007-07-11 11:32:31 · 2 answers · asked by Anonymous

they are smaller than 1 nm
they scatter light
both (a) and (b)
neither (a) nor (b)

2007-07-11 11:30:10 · 2 answers · asked by D 1

what is the freezing point of this solution?

2007-07-11 11:28:10 · 2 answers · asked by D 1

0.1 M NaCl
0.1 M BaCl2
0.1M AlCl2
All have the same conductivity

2007-07-11 11:22:32 · 2 answers · asked by D 1

2007-07-11 10:51:53 · 3 answers · asked by Anonymous

In doing a flame test...
Why is it that you have to subject the sample to a flame?

What will happen if the flame test is performed on a solution with more than one metal component?

Aside from the qualitative analysis of metals, state at least one other application of flame tests.

2007-07-11 10:44:43 · 3 answers · asked by aishawarya 2

My book says that Ca2+ and Mg2+ are in a 1:1 molar ratio with EDTA. However, what about compounds like Co and others? When will I know when it isn't a 1:1 ratio?

2007-07-11 09:20:46 · 2 answers · asked by ScienceNut 2

2007-07-11 09:11:19 · 6 answers · asked by Anonymous

If man made what are they made of???

2007-07-11 08:17:29 · 6 answers · asked by Misty 2

I wan't to buy a pewter chain and i want to know if it will rust off if i let it stay in water or will it change it's colour??

2007-07-11 08:14:39 · 5 answers · asked by Not your B 2

2007-07-11 06:59:09 · 3 answers · asked by Anonymous

Please lets not have so much of the drug comments. I'd like to hear about a happy experiment, or a experience you've had pertaining to chemistry.

2007-07-11 05:41:51 · 9 answers · asked by billgoats79 5

The first energy level?
The second energy level?

2007-07-11 05:31:01 · 3 answers · asked by Shuji Ishikawa 2

please show work

2007-07-11 04:11:52 · 4 answers · asked by Anonymous

Please show work

2007-07-11 04:06:54 · 1 answers · asked by Anonymous