2006-12-07 18:27:37 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
An alkene is an aliphatic hydrocarbon (though it's also applied more generally to other organic molecules) which has at least one double bond and no triple bonds (if it has triple bonds it's an alkyne).
You should remember that an alkane (no double or triple bonds) has a molecular formula like C(n)H(2n+2). Each additional carbon-carbon bond reduces the number of hydrogren atoms by 2. So an alkene with a single double bond will have a formula like C(n)H(2n). Unfortunately none of yours are like this! We will have to consider multiple bonds.
So, C7H16 is an alkane. C9H8 is missing 12 H atoms from the alkane, so must have 6 additional bonds - it could have 6 double bonds or 3 triple bonds, or a combination, so this could be either an alkene or an alkyne. Similarly, C5H8 is missing 4 hydrogens, so it's either an alkene with two double bonds or an alkyne with one triple bond.
C6H6 is, of course, benzene, which is aromatic rather than aliphatic and is therefore not classed as an alkene.
2006-12-07 18:43:45 · answer #1 · answered by Scarlet Manuka 7 · 1⤊ 0⤋
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RE:
a molecular formula of an alkene is ( C7H16, C9H8,C5H8,C6H6)?
2015-08-18 04:27:01 · answer #2 · answered by Cherlyn 1 · 0⤊ 0⤋
Oh my god you can't even spell alkaline and your homework sheet is right in front of you.
2016-03-16 04:33:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋
scarlet's correct.
2006-12-07 19:02:44 · answer #4 · answered by Anonymous · 0⤊ 0⤋
yes it is right
2006-12-07 18:34:46 · answer #5 · answered by Sonu G 5 · 0⤊ 0⤋