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2001 - Multiple Choice - Q14 Attention all lovely people =)

Pammy

Posted 26 May 2006 - 02:37 PM

The answer is B. electrons in 1g of Hydrogen
can someone tell me why !!!???

Thanx in advance


will_789

Posted 26 May 2006 - 02:39 PM

QUOTE(Pammy @ May 26 2006, 03:37 PM) View Post

The answer is B. electrons in 1g of Hydrogen
can someone tell me why !!!???

Thanx in advance


Woop i know this answer!!!
Right, give me 5 mins and ill explain!

Nathan

Posted 26 May 2006 - 02:40 PM

the only ones i can rule out are C&D because C is 2xavogado's as is D...A&B seem to give me the same answer :S

will_789

Posted 26 May 2006 - 02:42 PM

QUOTE(nathanm @ May 26 2006, 03:40 PM) View Post

the only ones i can rule out are C&D because C is 2xavogado's as is D...A&B seem to give me the same answer :S


ooo, soo close!!!
A is ruled out because the mass of one mole of oxygen is 32g, not 16!
O(small2)
Therefore there are 6.02x10^23 molecules in 32g, which isnt correct
Thats all you've done wrong.
Well done on the process of elimination

Pammy

Posted 26 May 2006 - 02:44 PM

A is only half a mole of Oxygen so it's half of Avagadros
And that's what I thought about C, but how did you know D was 2x avagadro ??

Nathan

Posted 26 May 2006 - 02:44 PM

QUOTE(will_789 @ May 26 2006, 03:42 PM) View Post

O(small2)


you can do O [ s u b ]2[ / s u b] (no spaces) = O2

will_789

Posted 26 May 2006 - 02:45 PM

QUOTE(Pammy @ May 26 2006, 03:44 PM) View Post

A is only half a mole of Oxygen so it's half of Avagadros
And that's what I thought about C, but how did you know D was 2x avagadro ??

My Chemistry teacher told us something that it cant ever be ions...Im not quite sure tho...Could be wrong...lol

Nathan

Posted 26 May 2006 - 02:46 PM

QUOTE
And that's what I thought about C, but how did you know D was 2x avagadro ??


Na+ + Cl- = 2moles ions = 2xavogadros wink.gif

edit *i think*

will_789

Posted 26 May 2006 - 02:52 PM

QUOTE(nathanm @ May 26 2006, 03:46 PM) View Post

QUOTE
And that's what I thought about C, but how did you know D was 2x avagadro ??


Na+ + Cl- = 2moles ions = 2xavogadros wink.gif

edit *i think*

Yeah well done, thats it.
Also, my chemistry teacher told us, if you cant work out the answer for these types, always guess the hydrogen if you cant completely eliminate it, as hydrogen is usually the answer

Pammy

Posted 26 May 2006 - 02:59 PM

QUOTE(will_789 @ May 26 2006, 02:52 PM) View Post

QUOTE(nathanm @ May 26 2006, 03:46 PM) View Post

QUOTE
And that's what I thought about C, but how did you know D was 2x avagadro ??


Na+ + Cl- = 2moles ions = 2xavogadros wink.gif

edit *i think*

Yeah well done, thats it.
Also, my chemistry teacher told us, if you cant work out the answer for these types, always guess the hydrogen if you cant completely eliminate it, as hydrogen is usually the answer


Pair of smarty pants !! tongue.gif
Thanx for the help !! much appreciated !!

Edit: omg look !!! I'm a site swot now !!!!!!!!! tongue.gif I think I am out of noobville now !! smile.gif

will_789

Posted 26 May 2006 - 03:00 PM

QUOTE(Pammy @ May 26 2006, 03:59 PM) View Post

QUOTE(will_789 @ May 26 2006, 02:52 PM) View Post

QUOTE(nathanm @ May 26 2006, 03:46 PM) View Post

QUOTE
And that's what I thought about C, but how did you know D was 2x avagadro ??


Na+ + Cl- = 2moles ions = 2xavogadros wink.gif

edit *i think*

Yeah well done, thats it.
Also, my chemistry teacher told us, if you cant work out the answer for these types, always guess the hydrogen if you cant completely eliminate it, as hydrogen is usually the answer


Pair of smarty pants !! tongue.gif
Thanx for the help !! much appreciated !!


Not a problem, Helping people is helping me! biggrin.gif

Nathan

Posted 26 May 2006 - 03:02 PM

QUOTE(will_789 @ May 26 2006, 04:00 PM) View Post

Not a problem, Helping people is helping me! biggrin.gif


that's my excuse for sitting here and chatting to peeps too biggrin.gif

will_789

Posted 26 May 2006 - 03:02 PM

QUOTE(nathanm @ May 26 2006, 04:02 PM) View Post

QUOTE(will_789 @ May 26 2006, 04:00 PM) View Post

Not a problem, Helping people is helping me! biggrin.gif


that's my excuse for sitting here and chatting to peeps too biggrin.gif

Yeah, doing past papers at the same time

Pammy

Posted 26 May 2006 - 03:03 PM

QUOTE(nathanm @ May 26 2006, 03:02 PM) View Post

QUOTE(will_789 @ May 26 2006, 04:00 PM) View Post

Not a problem, Helping people is helping me! biggrin.gif


that's my excuse for sitting here and chatting to peeps too biggrin.gif



Hey nathan, you just blew my cover !!!!!!!!!!!! Well done !! tongue.gif rolleyes.gif biggrin.gif

Edit: the "well done" is supposed to be in a sarcastic tone btw

Nathan

Posted 26 May 2006 - 03:05 PM

QUOTE(Pammy @ May 26 2006, 04:03 PM) View Post

Hey nathan, you just blew my cover !!!!!!!!!!!! Well done !! tongue.gif rolleyes.gif biggrin.gif

Edit: the "well done" is supposed to be in a sarcastic tone btw



laugh.gif

[sarcasm]i'm sorry[/sarcasm] tongue.gif

Pammy

Posted 26 May 2006 - 03:06 PM

QUOTE(will_789 @ May 26 2006, 03:02 PM) View Post


Yeah, doing past papers at the same time


Yes sure wink.gif
nah I'm only kidding, I am doing that too, my mum says I should be a teacher coz I love to explain stuff to people and sit on this waiting for people to get stuck tongue.gif I know, I'm weird, but it's true

Edit: I agree with you will tho coz it does help me too smile.gif (and makes me feel smart when I get it right tongue.gif)

will_789

Posted 26 May 2006 - 03:07 PM

QUOTE(Pammy @ May 26 2006, 04:06 PM) View Post

QUOTE(will_789 @ May 26 2006, 03:02 PM) View Post


Yeah, doing past papers at the same time


Yes sure wink.gif
nah I'm only kidding, I am doing that too, my mum says I should be a teacher coz I love to explain stuff to people and sit on this waiting for people to get stuck tongue.gif I know, I'm weird, but it's true


totally helps revision tho!!!

Nathan

Posted 26 May 2006 - 03:07 PM

QUOTE(Pammy @ May 26 2006, 04:06 PM) View Post

Yes sure wink.gif
nah I'm only kidding, I am doing that too, my mum says I should be a teacher coz I love to explain stuff to people and sit on this waiting for people to get stuck tongue.gif I know, I'm weird, but it's true


laugh.gif That's what I;m doing too tongue.gif

Pammy

Posted 26 May 2006 - 03:11 PM

[sarcasm] omg it's just like a big game of snap in here !!! [/sarcasm]

Sorry I had to steal your sarcasm thing nathan coz it actually made me lol

Nathan

Posted 26 May 2006 - 03:27 PM

QUOTE(Pammy @ May 26 2006, 04:11 PM) View Post

[sarcasm] omg it's just like a big game of snap in here !!! [/sarcasm]

Sorry I had to steal your sarcasm thing nathan coz it actually made me lol


biggrin.gif

***disclaimer***

the [sarcasm] and [/sarcasm] tags are copyright nathanm 2006

now leave it alone pammy mad.gif

tongue.gif

jus kiddin wink.gif

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