Author Topic: IGCSE CHEMISTRY DOUBTS  (Read 28697 times)

Offline Vin

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Re: IGCSE CHEMISTRY DOUBTS
« Reply #180 on: June 07, 2010, 09:31:45 am »
2 questions,
1st, there was a qs in stoichiometry and the answer was that there were 0.03 moles of O2 molecules then they asked how many moles of oxygen atoms will there be. the answer is 0.06. i dont get why :/ isnt it supposed to be the opposite? like you half it instead of twice it? :/

and second question, in CO2 are the C and the O bonded by a double bond? cuz if theres only a single bond then there are only gonna be 6 e's around C

Where was the question? I need it, other wise wont be able to solve..

Yes, double bond..

Offline Dana

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Re: IGCSE CHEMISTRY DOUBTS
« Reply #181 on: June 07, 2010, 09:34:39 am »
Where was the question? I need it, other wise wont be able to solve..

Yes, double bond..
thank you thank you thank you! :D
its question 2)c) O/N 01

elemis

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Re: IGCSE CHEMISTRY DOUBTS
« Reply #182 on: June 07, 2010, 01:45:39 pm »
As all IGCSE chemistry exams are over this thread will be now locked.