Comments on: O Level Chemistry Question: Mole Concepts / Mole Calculations http://www.simplechemconcepts.com/chemistry-questions-mole-concepts-2/ Chemistry Made Easy Fri, 23 Jul 2010 03:40:12 -0500 http://wordpress.org/?v=2.8.4 hourly 1 By: arush http://www.simplechemconcepts.com/chemistry-questions-mole-concepts-2/comment-page-1/#comment-2370 arush Wed, 03 Jun 2009 14:13:37 +0000 http://simplechemconcepts.com/2007/10/15/chemistry-questions-mole-concepts-2/#comment-2370 A is the answer A is the answer

]]> By: arush http://www.simplechemconcepts.com/chemistry-questions-mole-concepts-2/comment-page-1/#comment-2369 arush Wed, 03 Jun 2009 14:11:42 +0000 http://simplechemconcepts.com/2007/10/15/chemistry-questions-mole-concepts-2/#comment-2369 the answer for all is the same the no. of atoms in each case is equal the answer for all is the same
the no. of atoms in each case is equal

]]> By: Sherman Bok http://www.simplechemconcepts.com/chemistry-questions-mole-concepts-2/comment-page-1/#comment-1061 Sherman Bok Mon, 18 Aug 2008 12:27:16 +0000 http://simplechemconcepts.com/2007/10/15/chemistry-questions-mole-concepts-2/#comment-1061 Singapore. Taking 'A' levels now but I think if the same question comes out the answer still stands. I sometimes just mull too much over certain questions. Singapore. Taking ‘A’ levels now but I think if the same question comes out the answer still stands. I sometimes just mull too much over certain questions.

]]> By: sean http://www.simplechemconcepts.com/chemistry-questions-mole-concepts-2/comment-page-1/#comment-1057 sean Mon, 18 Aug 2008 08:49:14 +0000 http://simplechemconcepts.com/2007/10/15/chemistry-questions-mole-concepts-2/#comment-1057 Hi Sherman, That is a good question from you. You are not wrong to signal out that molecules and ions are indeed different from atoms. However, based on GCE O Level examination context, molecules and ionic compounds are essentially made up of atoms. As such, the questions is asking how many atoms made up a certain amount of molecules or ionic compounds. As such, the answer still stands. Hope this helps. PS: By the way, which country are you from and which educational system/code do you follow? Cheers Sean Chua Founder & Master Trainer of SimpleChemConcepts.com Hi Sherman,

That is a good question from you. You are not wrong to signal out that molecules and ions are indeed different from atoms.

However, based on GCE O Level examination context, molecules and ionic compounds are essentially made up of atoms. As such, the questions is asking how many atoms made up a certain amount of molecules or ionic compounds.

As such, the answer still stands.

Hope this helps.

PS: By the way, which country are you from and which educational system/code do you follow?

Cheers
Sean Chua
Founder & Master Trainer of SimpleChemConcepts.com

]]> By: Sherman Bok http://www.simplechemconcepts.com/chemistry-questions-mole-concepts-2/comment-page-1/#comment-1044 Sherman Bok Tue, 12 Aug 2008 13:45:09 +0000 http://simplechemconcepts.com/2007/10/15/chemistry-questions-mole-concepts-2/#comment-1044 Just a question, if they are asking for atoms, shouldn't we rule out the possibility of A and C? This is due to the fact that they exist as molecules. Although you can say we can calculate the "number of atom" from molecules, however due to the formation of covalent bonds, they are no longer atoms but molcules. Similarly, neither can you call an ion an atom. Hence, is there even the slightest possibility that the answer is B, with 2 moles of Magnesium (that is, 1.204 x 10^24 atoms), more than the 6.02 x 10^23 atoms of Argon? Thanks a lot, and please don't flames me, thats just my take pertaining to the question. Just a question, if they are asking for atoms, shouldn’t we rule out the possibility of A and C? This is due to the fact that they exist as molecules. Although you can say we can calculate the “number of atom” from molecules, however due to the formation of covalent bonds, they are no longer atoms but molcules. Similarly, neither can you call an ion an atom. Hence, is there even the slightest possibility that the answer is B, with 2 moles of Magnesium (that is, 1.204 x 10^24 atoms), more than the 6.02 x 10^23 atoms of Argon? Thanks a lot, and please don’t flames me, thats just my take pertaining to the question.

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