Asked by Lindsay

Which one of these has the smallest # of hydrogen atoms?
a) Butyne
b) Butane
c) Butyne
d) Cyclobutane

Is the answer c)?
Answered by drwls
How is (a) different from (c) ?

Googling the compound names will get you the formulas
Answered by Lindsay
**Sorry, c) was supposed to be butene.
Answered by Lindsay
So it should be a) correct?
Answered by drwls
Butyne has 6 H's
Butane has 10 H's
Butene has 8 H's
Cyclobutane has 8 H's

Yes, a is correct
Answered by Dr Russ
a) Butyne (CH3CH2CCH) 6H
b) Butane (CH3CH2CH2CH3) 10H
c) Butene (CH3CH2CHCH2) 8H
d) Cyclobutane (CH2CH2CH2CH2) 8H

so agreed a)

Note that there is a learning point here in that there is an equivalance between a ring (in cyclobutane) and a double bond. So we can talk in terms of 'double bond equivalents'.

Answered by Lindsay
Thank you!
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