moles and concentrations

[mollykins]

I have two questions i hope someone will check, to see if i'm doing them right, please;

1)what volume of 0.1m of sulfuric acid contains 0.002 moles

would the answer be, 98 (the relative molecular mass) x 0.002 , then either divided or multiplied by 0.1?

2) 4.24g of Na2CO3 is dissolved in water and the solution is made up to 250ml. what is the concentration of the solution in mol dm^-3 ?

would you, say there's 106g in 1dm^-3 (or 1 mol), then divide that by 4.24 to get 25 mol dm^-3, then divide that by 40 to find the mol dm^-3 ? which I make to be 0.625 mol dm^-3 ????????????????????

[squarebear]

Oh jeez. Here we go again.

[mollykins]

There's laods of questions, but if you don't get these first parts right, you can't do most of the rest of the questions.

[squarebear]

I find it a bit strange that you didn't know where to look for your National Insurance number in one thread and in other you take about "relative molecular mass".

[mollykins]

Why's it odd?

[mollykins]

This is a-level work, which means i'm 17 (well it could be anywhere between 16 and 19) which means I should have recieved my NI number recently, but I didn't, why's that odd?

[squarebear]

Because it's one extreme to the other. Surely, if you are discussing relative molecular mass, you would know simple queries?

[woofgang]

nah, I can tell you about the twelve cranial nerves in some detail but I don't know what my tyre pressures are.....

[mollykins]

What The Funicular has that got to do with anything, jsut because I do alevel chemsitry it doesn't mean I had a bureaucracy problems . . .

[mollykins]

SB if you can't help, can you stop spamming this thread please.

[Daily-Editor]

Consider yourself told squarebear!

[squarebear]

Ooohh!!

http://www.internetbi.../uploads/handbags.jpg

[ummmm]

Gosh....you are so rude for one so young Molly. What SB pointed out is very valid actually. You ask a question like this but can't figure out for yourself how to make a phone call...

[mollykins]

I did make the phone call . . .

[ummmm]

After we told you over and over and over again...

[mollykins]

It is now vibra, that i'm getting irrelevant spam on this thread . . .

[mike11111]

Why was my answer removed when I made a play on words with molecules and mollykules? Have whimsy and humour been sacrificed upon the altar of youth?

[RATTER15]

As an ex professional Mole trapper, I thought would be able to answer the question on the concentration of moles in a particular area.


Then you got all mathematical!!!!

Now I see why it isn't in Animals & Nature :-(