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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 353959 times)

Offline Fastal

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1470 on: May 22, 2010, 04:00:33 pm »
Quote from: Ari Ben Canaan on May 22, 2010, 03:53:44 pm
I dont quite understand what the question is saying ; What RESULT ?



woah i dont get that either

and whats the difference between nitrite and nitrates, do plants take in both kinds?
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holtadit

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1471 on: May 22, 2010, 04:01:20 pm »
Quote from: nid404 on May 22, 2010, 03:59:35 pm
Is the answer D?

YES !!! But how ?

NH3 and N2 wont react by themselves.... they need a catalyst, right ?
« Last Edit: May 22, 2010, 04:05:22 pm by Ari Ben Canaan »
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1472 on: May 22, 2010, 04:04:00 pm »
Quote from: Ari Ben Canaan on May 22, 2010, 04:01:20 pm
YES !!! But how ?

NH3 and H2 wont react by themselves.... they need a catalyst, right ?
Where did H2 come from? O_O...how'd u get it nid404?
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1473 on: May 22, 2010, 04:06:21 pm »
Quote from: Ari Ben Canaan on May 22, 2010, 04:01:20 pm
YES !!! But how ?

NH3 and N2 wont react by themselves.... they need a catalyst, right ?

exactly! thts wat i thought !!
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holtadit

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1474 on: May 22, 2010, 04:08:47 pm »
Quote from: ~VIN1094~ on May 22, 2010, 04:06:21 pm
exactly! thts wat i thought !!

Lets w8 for Nid. :)
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Offline Burhan.arshad

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1475 on: May 22, 2010, 04:09:03 pm »
is answer d?
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nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1476 on: May 22, 2010, 04:09:55 pm »
Quote from: Ari Ben Canaan on May 22, 2010, 04:01:20 pm
YES !!! But how ?

NH3 and N2 wont react by themselves.... they need a catalyst, right ?

naah naah...you don't get the question...you know the whole tube is filled with the 2 gases. then it's immersed in water. ammonia dissolves in water, this makes the water rise up....because some of the gas has dissolved..water takes up the empty space
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holtadit

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1477 on: May 22, 2010, 04:15:28 pm »
Thanks Nid :)
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Offline princess12

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1478 on: May 22, 2010, 04:20:48 pm »
oct nov 2009 question no 17,18,21,34
explain me fast urgently
 ??? ??? ??? ??? ??? ??? ??? ??? ??? ???
in paper 1
« Last Edit: May 22, 2010, 04:22:31 pm by princess12 »
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1479 on: May 22, 2010, 04:21:11 pm »
I've got a small question:

Blood in the smallest arteries in a muscle flows into networks of capillaries.

The flow through these networks is much slower than through arteries or veins.

Suggest how these features, together with the structure of capillaries, assist in supplying glucose to muscle cells.    

(4 marks)
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1480 on: May 22, 2010, 04:21:37 pm »
Quote from: nid404 on May 22, 2010, 04:09:55 pm
naah naah...you don't get the question...you know the whole tube is filled with the 2 gases. then it's immersed in water. ammonia dissolves in water, this makes the water rise up....because some of the gas has dissolved..water takes up the empty space


oh ok .. umm .. y not C .. even it has ammonia ..  :-\ or is that without any other insoluble gas water wont move up due to pressure or something ?(i kno i sound stupid :|)  
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nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1481 on: May 22, 2010, 04:22:04 pm »
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1482 on: May 22, 2010, 04:22:44 pm »
Quote from: princess12 on May 22, 2010, 04:20:48 pm
oct nov 2009 question no 17,18,21,34
explain me fast urgently
 ??? ??? ??? ??? ??? ??? ??? ??? ??? ???

chem / bio ??
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holtadit

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1483 on: May 22, 2010, 04:23:42 pm »
Quote from: ~VIN1094~ on May 22, 2010, 04:21:37 pm

oh ok .. umm .. y not C .. even it has ammonia ..  :-\ or is that without any other insoluble gas water wont move up due to pressure or something ?(i kno i sound stupid :|)  

That is a GOOD question.
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Offline princess12

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1484 on: May 22, 2010, 04:24:01 pm »
chemistry
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