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Marine Science / How do seals hold their breath underwater?
« on: 13/01/2010 13:14:54 »
why seal can hold breathe for long time but human cannot?
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Chemistry / Re: How would a methane and oxygen fuel cell work?
« on: 13/01/2010 13:08:45 »
this is the question my teacher ask me...
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Chemistry / How would a methane and oxygen fuel cell work?
« on: 12/01/2010 14:21:10 »
A fuel cell is designed to use methane and oxygen in a similar manner to H2/O2 fuel cell. If the electrolyte is acidic, determine the electrode reactions.
[MOD EDIT: DO US ALL A FAVOUR: WHEN POSTING YOUR HOMEWORK HERE FOR OTHER PEOPLE TO DO, PLEASE FOLLOW THE FORUM RULE OF GIIVNG YOUR THREADS TITLES THAT ARE PHRASED AS QUESTIONS. THANKS. CHRIS.]
[MOD EDIT: DO US ALL A FAVOUR: WHEN POSTING YOUR HOMEWORK HERE FOR OTHER PEOPLE TO DO, PLEASE FOLLOW THE FORUM RULE OF GIIVNG YOUR THREADS TITLES THAT ARE PHRASED AS QUESTIONS. THANKS. CHRIS.]
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Chemistry / Why does glycolysis use glucose-6-phosphate but fructose-1,6-bisphosphate?
« on: 07/01/2010 13:53:06 »
why glucose have to change to glucose-6-phosphate and fructose-1,6-bisphosphate during glycolysis?
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Chemistry / what has electronegativity got to do with polarisation?
« on: 14/11/2009 06:23:33 »
Haha! Thanks for try so hard to show me.. thanks again...
If the different in the electronegativity between the ions in a compound is small, the polarisation is big or small?
Polarisation cause the partially covalent properties of an ionic compound is it?
If yes for both questions above, then how come the different in electronegativity between Ag ion and Cl ion is small, but there is partially covalent properties between them?
If the different in the electronegativity between the ions in a compound is small, the polarisation is big or small?
Polarisation cause the partially covalent properties of an ionic compound is it?
If yes for both questions above, then how come the different in electronegativity between Ag ion and Cl ion is small, but there is partially covalent properties between them?
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Chemistry / what has electronegativity got to do with polarisation?
« on: 13/11/2009 06:20:29 »
http://what has electronegativity got to do with polarisation?
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Chemistry / Re: What determines the boiling points of aluminium and magnesium?
« on: 24/10/2009 14:25:22 »
thanks for explain..
best wishes. [
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best wishes. [
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Chemistry / Why do some transition metals have variable oxidation numbers?
« on: 23/10/2009 16:08:33 »
transition metals are the elements in between group 2 to group 3(i mean between the group that start with Be to the group that start with B). can i say like that? Is it an explanation?
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Chemistry / Re: What determines the boiling points of aluminium and magnesium?
« on: 23/10/2009 14:24:29 »
"number of "nearest neighbours" an atom has in a structure" = number of bonding with other atoms?
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Chemistry / Re: What determines the boiling points of aluminium and magnesium?
« on: 22/10/2009 16:21:41 »
em.. sorry, what is coordination number and infant transition metal?
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Chemistry / Re: What determines the boiling points of aluminium and magnesium?
« on: 21/10/2009 11:20:12 »
oops.. sorry, is melting point. "lower atomic radius of Al"? then how about magnesium. sorry a... my english is not pro. my chemistry also not pro. so can u all explain in the way that is more easy for me to understand?
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Chemistry / Re: What determines the boiling points of aluminium and magnesium?
« on: 20/10/2009 16:58:45 »
My question is, why the boiling point of these two elements is differ by about 10C only?? what cause this??
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Chemistry / What determines the boiling points of aluminium and magnesium?
« on: 19/10/2009 14:14:56 »
why the boiling point of aluminium is more than magnesium by 10C only?
[MOD EDIT - PLEASE PHRASE YOUR THREAD TITLES AS QUESTIONS IN FUTURE. THIS IS FORUM POLICY AND HELPS USERS TO FIND ITEMS OF INTEREST TO THEM, RESULTING IN MORE ANSWERS TO YOUR OWN QUESTIONS; THANKS CHRIS]
[MOD EDIT - PLEASE PHRASE YOUR THREAD TITLES AS QUESTIONS IN FUTURE. THIS IS FORUM POLICY AND HELPS USERS TO FIND ITEMS OF INTEREST TO THEM, RESULTING IN MORE ANSWERS TO YOUR OWN QUESTIONS; THANKS CHRIS]
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Chemistry / What is the bonding configuration in carbon monoxide?
« on: 15/10/2009 16:07:17 »
how was the bonding between carbon monoxide?
carbon can bond with oxygen with single, double or triplet bond?
carbon can bond with oxygen with single, double or triplet bond?
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Chemistry / Why does magnesium form magnesium nitride when it burns?
« on: 14/10/2009 17:26:24 »
thanks thanks!!! got it.
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Chemistry / barium sulfate and barium carbonate
« on: 14/10/2009 17:15:53 »
Nvr mind, lightarrow. Then, who else can answer me? Chris? Bored chemist?
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Chemistry / barium sulfate and barium carbonate
« on: 12/10/2009 15:01:39 »
Why change "sulphate" into "sulfate"?
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Chemistry / Why does magnesium form magnesium nitride when it burns?
« on: 12/10/2009 14:57:36 »
why magnesium gives the nitride, in addition to its oxide when burned in air?
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Chemistry / barium sulfate and barium carbonate
« on: 12/10/2009 14:54:41 »
Yup! thanks for reply.
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Chemistry / How does water form a membrane to make bubbles?
« on: 12/10/2009 14:49:35 »
Yup, clear. thanks for reply. []
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