The official off-topic thread

Could someone brave please try and answer the questions that haven´t been answered yet? I only remembered asking about it now.

Camelidae wrote:

CantThinkOfAny wrote:OK. You have the weight. Then you simply multiply it by molar mass constant, which is 1 g/mol.

Why is it 1g/mol and not something else? Does it ever change (seeing as it´s called "constant", I´d guess it doesn´t, but what point is there in multiplying anything with 1, could just as well leave that part out)?

As for Avogadro's law, as far as I know, it just uses the idea that the density of vapor can be used to derive the molar mass.

How?

How do I know the weight of the seperate elements? I checked the table, which you also should have. If not, I understand the use of the Avogadro's law.

Which parts of the table are relevant for the elements´ weight?

I still haven´t quite understood how Avogadro´s law is supposed to help me here.

Why is it 1g/mol and not something else? Does it ever change (seeing as it´s called "constant", I´d guess it doesn´t, but what point is there in multiplying anything with 1, could just as well leave that part out)?

http://en.wikipedia.org/wiki/Molar_mass_constant

The molar mass constant is important in writing dimensionally correct equations.

How?

Sigh.

Well, from wikipedia:

We know that PV=nRT. (n = number of moles, R = the ideal gas constant, T = temperature, P = pressure, V = volume)

We know that density of vapor p = nM/V, (M is molar mass of the gas)

From this we get that V = nM/p

Combine the two. We get that P(nM/p) = nRT -> M = pnRT/(PM) = pRT/P.

So if you know the density, temperature and pressure of the gas, you get the molar mass.

Which parts of the table are relevant for the elements´ weight?

The relevant parts.

ie. the weights. They should be given.

Do you like my monocle O_Q ?

Depends on if you like my Kirby;


<(-' '-)>

My wife and I saw a local (well, an hour away) production of Rent last week. It was amazing, especially as I went in completely new to it. I've already ordered - and received - the original Broadway recording, the 2005 film recording, the film itself and the Broadway 2009 blu-ray, so I'd say I'm quite the fan now. Although it was a local production the cast were perfect and I really associate them with the characters.

My previous favourite was Joseph (maybe Jesus Christ Superstar), but I think this has topped it.

Managed to see a live production of Sweeny Todd last year. That was certifiably fantastic.

I've never seen that production, actually, although I did want to buy the Burton/Depp collaboration. I've no idea if it's worthy.

I was due to watch Phantom of the Opera with my wife in New York a year or so ago, which would have been an amazing, unforgettable performance. We booked up months prior.

We got the dates wrong and realised we missed it by a day. Ouch.

Can I change the subject?

Anyone got one of those dinky Raspberry Pi single-board computers yet? I have ... not too sure what to do with it, as it's intended as a learning experience (I'm a closet nerd, hoping to come out of my shell). I have connected it up, adjusted the partitions, got a wireless keyboard and mouse attached, all seems well so far!

Interested to hear if anyone else is on a learning curve or just experimenting with it!

^^^ I guess not. I wouldn't know where to begin.

I've not been here for about two months; my wife's been on vacation and so we've been too busy. We still have bathroom decorating to go (many headaches) but things are winding down now, so I might be online some more. If anybody remembers me, of course.

Tramned wrote:^^^ I guess not. I wouldn't know where to begin.

I've not been here for about two months; my wife's been on vacation and so we've been too busy. We still have bathroom decorating to go (many headaches) but things are winding down now, so I might be online some more. If anybody remembers me, of course.

I do..... I saw your name on the board today and thought I hadn't seen you in a while!

Are you saying your wife's vacation was spent redecorating the house? Oh my!