Comments on: Melamine in Milk Powders – Chemistry put in Wrong Use

By: SimpleChemConcepts | Chemistry Phenomenon - Industrial Use of Melamine

SimpleChemConcepts | Chemistry Phenomenon - Industrial Use of Melamine — Wed, 24 Feb 2010 14:22:22 +0000

[...] September this year, i wrote a blogpost on the Wrong Use of Chemicals Melamine in the “Sanlu Milk Powder Poisoning in China” [...]

By: Yeo Terence

Yeo Terence — Sat, 04 Oct 2008 07:05:52 +0000

Thanks. I have gotten your email about it and will check that out.

By: sean

sean — Tue, 30 Sep 2008 08:18:46 +0000

Hi Terence,

Glad to see you attempting the question.

Correct approach to deal with this kind of question.

However, i need to point out that answer should be 66.7% instead, since we need to correct to 3 significant figures.

Hope this helps.

PS: I am launching the ebook “Up Your Chemistry Grades Nows!” before it is being published into hardcopy. There is a major section that have a comprehensive discussion of major / common mistakes made by students.

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer
http://www.SimpleChemConcepts.com

By: sean

sean — Tue, 30 Sep 2008 08:14:16 +0000

Hi,

I don’t really get your question.

Few points here:

1) Redspot books and all other published exam-based books you get from major bookstore are not without errors. There is a 2-5% error that we have heard from many students. Do use with caution.

2) Which country are you from? and which exam-syllabus are you taking? GCE O or ICGSE etc?

3) Can you send me a scanned or softcopy of your question to my email sean@simplechemconcepts.com so that i can better helo you.

Hear from you.

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer
http://www.SimpleChemConcepts.com

By: Yeo Terence

Yeo Terence — Sat, 27 Sep 2008 15:31:38 +0000

[Ar: C- 12 H -1 N-14]

Mr of C3H6N6: 3(12)+6(1)+6(14) = 126

6(14)
—— X 100% = 66.6%
126