Chemistry - September 2007

How many mL of a 0.524 M solution of CH3OH will contain 11.3 g of CH3OH?

Not sure how you figure this...

2007-09-08 17:11:14 · 2 answers · asked by lub1210 1

Group -6
Period -7

2007-09-08 16:49:34 · 2 answers · asked by To-the-Stars 4

Suppose this was the problem..

If a person weighs 165 lbs, how many grams does this person weight? The answer's 74,910 grams, but how do I write this properly, considering sig figs and all that? Rules and when to do what are appreciated.

2007-09-08 16:48:23 · 5 answers · asked by lirael1019 1

2007-09-08 16:39:20 · 7 answers · asked by To-the-Stars 4

A diving bell has an air space of 3.0m^3 when on the deck of a boat. What is th evolume of the air space when the bell has been lowered to a depth of 50m? Take the mean density of sea water to be 1.025g / cm^3 and assume that the temperature is the same as on the surface.


First I took 1.025g/cm^3 and converted it to kg/m^3. Then I multiplied it by acceleration of gravity so that I could turn it into a pressure. After this I multiplied by 50m to get 50,225 N/m^2, which is 50,225 Pa (P2). Given that STP is 1 bar (10^5 Pa) I designated that P1. V1 is given as 3m^3 so I calculated V2 using P1*V1=P2*V2 but I got an answer that was higher than my original volume which can't be correct.

2007-09-08 16:39:13 · 1 answers · asked by ScienceNut 2

Are they in double or triple bonds? Or do they just have 1 and 2 pi bonds respectively?

2007-09-08 16:26:14 · 3 answers · asked by Anonymous

When sodium bicarbonate is strongly heated, it is converted to sodium carbonate, carbon dioxide, and water. Write a balanced equation for this reaction. What type of reaction is this?

2007-09-08 15:55:22 · 1 answers · asked by Pizza_Lover 2

how do we complete the following equations (an explanation plz)

co(h2o)6 2+ + cocl4 2-

and : cu(h2o)6 2+ + cucl42-

(six molecules of water with a 2+ charge. 4 molecule of clorine with a 2- charge)

2007-09-08 15:29:24 · 1 answers · asked by DeSeRT EaGLe 1

does anybody know the symbol for the nuclide of vanadium that contains 28 neutrons with the correct superscript or subscript?
the symbol for an a particle?
the symbol of the nuclide of magnesium that has an equal number of protons and neutrons?
please tell me how to solve these problems... thanks

2007-09-08 13:51:17 · 2 answers · asked by jeremy 1

2007-09-08 13:20:06 · 5 answers · asked by 88888888 2

In the later 1880s, JJ. Thomson experimented with cathode rays by bending them in an applied electromagnetic field. He discovered that the charge/mass (e/m) ration was the same no matter what the cathode was made of.
a what did this suggest?
b what were these particles called?
c. what model of the aton's structure did he propose?

2007-09-08 13:02:09 · 3 answers · asked by Tammy 2

The container pictured below on the left is filled with water at 20°C, just to the overflow spout. A cube of wood with edges of 1.0 in. is floated on the water, and 10.8 mL of water is collected, as shown on the right. Calculate the density of the wood, and express your result with the maximum number of significant figures permitted in this experiment.

Picture: http://www.webassign.net/hpmp/1-72.gif

2007-09-08 12:45:52 · 3 answers · asked by unknownanonymous999 2

M means moles

how do u figure out this question

2007-09-08 12:38:34 · 4 answers · asked by Anonymous

How are the halogen electron configuratons similar?

2007-09-08 12:27:38 · 2 answers · asked by Anonymous

hey i have to do a project for science and i was wondering who discoverd gold like the orignal person to descover it
i looked but i cant find anything please help me

2007-09-08 12:13:18 · 7 answers · asked by sexyprep852 1

2007-09-08 12:11:54 · 1 answers · asked by Anonymous

2007-09-08 12:11:12 · 1 answers · asked by Roxy 3

Glucose is the major energy yielding nutrient for most cells. Assuming a cellular concentration of 1 mm (I think this means millimoles?), calculate how many molecules of glucose would be present in a hypothetical (and spherical) eukaryotic cell. (Avagadros number, the number of molecules in 1 mol of a nonionized substance, is 6.02 x 10^23)

The answer to the question is 3.9 x 10^10 molecules, but how do they get that answer? Thank You

2007-09-08 12:01:55 · 3 answers · asked by dfgh d 1

Suggest how the behaviour of the compound C6H5CH2Cl with hot KOH differs from that of C6H5Cl and from that of C6H5CH2CH2Cl. In each case, state the type of reaction undergone (if any) and write the formula of the product.

2007-09-08 11:50:13 · 1 answers · asked by Nilesh R 1

What household items would cause an explosion or a very large fire if they came into contact with a match or lighter?

2007-09-08 11:45:06 · 3 answers · asked by Anonymous

If 455 g Be(OH)2 were to react with 835 g V(CN)3 , and 437 g of Be(CN)2 and some V(OH)3 were formed, what would be the percent yield of this reaction?

2007-09-08 11:44:42 · 1 answers · asked by Anonymous

I am trying to get some hydrogen and oxygen from water and I want to make sure it is safe. I know they "purify" tap water by adding chlorine to it, so does the electrolisizing process make this experiment deadly?

2007-09-08 11:44:11 · 1 answers · asked by Nevada 2

How are water molecules able to make up to 4 hydrogen bonds with other molecules? I thought it would be 3 - the oxygen is attracted to another molecule's hydrogen, and each of the 2 hydrogens attracted to the oxygens of 2 other molecules. Can someone explain?
Also, on a website it said "The stronger the bonds, the more ordered and static is the resultant structure. The energetic cost of the disorder is proportional to the temperature, being smaller at lower temperatures." What does it mean by this? especially "energetic cost"
The site is http://www.lsbu.ac.uk/water/hbond-easy.html in case u need to see it in context.
I'd appreciate any help!

2007-09-08 11:41:42 · 3 answers · asked by Razzledazzle010 2

Which of these are correct IUPAC names:

3-isopropyloctane
3-ethyl-2-methyl-3-propylpenta...
3-ethyl-2-methyloctane
2,2-dimethyl-4-pentanol
N-ethyl-2-pentanamine
methyl ethyl ether
2-isopropoxybutane
2-sec-butoxyisopropane
4-hexylcyclobutane
3,3,4-trichloro-2-hexanol

2007-09-08 11:29:59 · 3 answers · asked by bdgurl5388 1

2007-09-08 11:13:06 · 3 answers · asked by candywhurl 1

Using IUPAC formalism name the structure where a cycloheptane bonds to cyclohexane... the structure looks like.....cycloheptane----cyclohexane "-----" = bond

hexylcycloheptane was what I thought, but that's wrong.

2007-09-08 10:54:46 · 3 answers · asked by <3 2

I am pretty sure it is a solution, but I am not positive.

2007-09-08 10:28:53 · 6 answers · asked by Anonymous 3

Which of these are correct IUPAC names:

3-isopropyloctane
3-ethyl-2-methyl-3-propylpentane
3-ethyl-2-methyloctane
2,2-dimethyl-4-pentanol
N-ethyl-2-pentanamine
methyl ethyl ether
2-isopropoxybutane
2-sec-butoxyisopropane
4-hexylcyclobutane
3,3,4-trichloro-2-hexanol

2007-09-08 10:07:46 · 1 answers · asked by bdgurl5388 1

NaCI, Ag3N, Fe2O3.

This is my AS level Chemistry homework, I'm struggling to calculate the atoms, can someone please help, thanks.

2007-09-08 10:03:44 · 4 answers · asked by Anonymous

SATP stands for standard ambient temperature and pressure

2007-09-08 09:59:37 · 1 answers · asked by Shani D 2