The answer is B. electrons in 1g of Hydrogen
can someone tell me why !!!???
Thanx in advance
0
2001 - Multiple Choice - Q14
Started by Pammy, May 26 2006 02:37 PM
45 replies to this topic
#1
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Posted 26 May 2006 - 02:37 PM
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#2
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Posted 26 May 2006 - 02:39 PM
QUOTE(Pammy @ May 26 2006, 03:37 PM) 
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!
#3
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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
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Posted 26 May 2006 - 02:42 PM
QUOTE(nathanm @ May 26 2006, 03:40 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
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
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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 ??
And that's what I thought about C, but how did you know D was 2x avagadro ??
*~* Kiss me, beneath the milky twilight, lead me, out on the moonlit floor, lift your open hand, strike up the band and make the fireflies dance, silver moon sparkling, so kiss me *~*
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Posted 26 May 2006 - 02:44 PM
QUOTE(will_789 @ May 26 2006, 03:42 PM)
O(small2)
you can do O [ s u b ]2[ / s u b] (no spaces) = O2
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Posted 26 May 2006 - 02:45 PM
QUOTE(Pammy @ May 26 2006, 03:44 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 ??
My Chemistry teacher told us something that it cant ever be ions...Im not quite sure tho...Could be wrong...lol
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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
edit *i think*
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Posted 26 May 2006 - 02:52 PM
QUOTE(nathanm @ May 26 2006, 03:46 PM)
QUOTE
And that's what I thought about C, but how did you know D was 2x avagadro ??
Na+ + Cl- = 2moles ions = 2xavogadros
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
#10
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Posted 26 May 2006 - 02:59 PM
QUOTE(will_789 @ May 26 2006, 02:52 PM)
QUOTE(nathanm @ May 26 2006, 03:46 PM)
QUOTE
And that's what I thought about C, but how did you know D was 2x avagadro ??
Na+ + Cl- = 2moles ions = 2xavogadros
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 !!
Thanx for the help !! much appreciated !!
Edit: omg look !!! I'm a site swot now !!!!!!!!!
I think I am out of noobville now !! 
*~* Kiss me, beneath the milky twilight, lead me, out on the moonlit floor, lift your open hand, strike up the band and make the fireflies dance, silver moon sparkling, so kiss me *~*
#11
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Posted 26 May 2006 - 03:00 PM
QUOTE(Pammy @ May 26 2006, 03:59 PM)
QUOTE(will_789 @ May 26 2006, 02:52 PM)
QUOTE(nathanm @ May 26 2006, 03:46 PM)
QUOTE
And that's what I thought about C, but how did you know D was 2x avagadro ??
Na+ + Cl- = 2moles ions = 2xavogadros
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 !!
Thanx for the help !! much appreciated !!
Not a problem, Helping people is helping me!
#12
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Posted 26 May 2006 - 03:02 PM
QUOTE(will_789 @ May 26 2006, 04:00 PM)
Not a problem, Helping people is helping me!
that's my excuse for sitting here and chatting to peeps too
#13
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Posted 26 May 2006 - 03:02 PM
QUOTE(nathanm @ May 26 2006, 04:02 PM)
QUOTE(will_789 @ May 26 2006, 04:00 PM)
Not a problem, Helping people is helping me!
that's my excuse for sitting here and chatting to peeps too
Yeah, doing past papers at the same time
#14
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Posted 26 May 2006 - 03:03 PM
QUOTE(nathanm @ May 26 2006, 03:02 PM)
QUOTE(will_789 @ May 26 2006, 04:00 PM)
Not a problem, Helping people is helping me!
that's my excuse for sitting here and chatting to peeps too
Hey nathan, you just blew my cover !!!!!!!!!!!! Well done !!
Edit: the "well done" is supposed to be in a sarcastic tone btw
*~* Kiss me, beneath the milky twilight, lead me, out on the moonlit floor, lift your open hand, strike up the band and make the fireflies dance, silver moon sparkling, so kiss me *~*
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Posted 26 May 2006 - 03:05 PM
QUOTE(Pammy @ May 26 2006, 04:03 PM)
Hey nathan, you just blew my cover !!!!!!!!!!!! Well done !!
Edit: the "well done" is supposed to be in a sarcastic tone btw
[sarcasm]i'm sorry[/sarcasm]
#16
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Posted 26 May 2006 - 03:06 PM
QUOTE(will_789 @ May 26 2006, 03:02 PM)
Yeah, doing past papers at the same time
Yes sure
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
I know, I'm weird, but it's trueEdit: I agree with you will tho coz it does help me too
(and makes me feel smart when I get it right )
*~* Kiss me, beneath the milky twilight, lead me, out on the moonlit floor, lift your open hand, strike up the band and make the fireflies dance, silver moon sparkling, so kiss me *~*
#17
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Posted 26 May 2006 - 03:07 PM
QUOTE(Pammy @ May 26 2006, 04:06 PM)
QUOTE(will_789 @ May 26 2006, 03:02 PM)
Yeah, doing past papers at the same time
Yes sure
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
I know, I'm weird, but it's truetotally helps revision tho!!!
#18
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Posted 26 May 2006 - 03:07 PM
QUOTE(Pammy @ May 26 2006, 04:06 PM)
Yes sure
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
I know, I'm weird, but it's true That's what I;m doing too
#19
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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
Sorry I had to steal your sarcasm thing nathan coz it actually made me lol
*~* Kiss me, beneath the milky twilight, lead me, out on the moonlit floor, lift your open hand, strike up the band and make the fireflies dance, silver moon sparkling, so kiss me *~*
#20
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Posted 26 May 2006 - 03:27 PM
QUOTE(Pammy @ May 26 2006, 04:11 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
***disclaimer***
the [sarcasm] and [/sarcasm] tags are copyright nathanm 2006
now leave it alone pammy
jus kiddin
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