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Author Topic: Organic question  (Read 281 times)

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Tamer7

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Organic question
« on: January 30, 2019, 03:13:00 AM »

How can i get the value of ā€œnā€ for an aclcohol such that the percentage by mass of oxygen equals 21.6%?
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Borek

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Re: Organic question
« Reply #1 on: January 30, 2019, 03:21:27 AM »

No idea which "n" (there is one obvious candidate, but in general question is pretty ambiguous), but the general approach is to express oxygen fraction as a function of "n" and to solve for the unknown.
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Re: Organic question
« Reply #2 on: February 03, 2019, 06:57:16 PM »

How can i get the value of ā€œnā€ for an aclcohol such that the percentage by mass of oxygen equals 21.6%?
General formula of alkanol is CnH2n+1OH
So which means : CnH2n+2 O
If O is 21.6 % then remaining mass is due to C and H
Moles of carbon and H are in the ratio of
n:2n+2
Now use your algebra skill and mole concept of chemistry to solve it.
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