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Topic: Organic question  (Read 1520 times)

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Offline Tamer7

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Organic question
« on: January 30, 2019, 09:13:00 AM »
How can i get the value of “n” for an aclcohol such that the percentage by mass of oxygen equals 21.6%?
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Offline Borek

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Re: Organic question
« Reply #1 on: January 30, 2019, 09:21:27 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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Offline Vidya

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Re: Organic question
« Reply #2 on: February 04, 2019, 12:57:16 AM »
Quote from: Tamer7 on January 30, 2019, 09:13:00 AM
How can i get the value of “n” 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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