Identify each noncyclical hydrocarbon as an alkane, alkene, or alkyne.
(a) C_3H_6
(b) C_6H_{14}
(c) C_{10}H_{18}
(a) C_3H_6
n = 3, 6 = 2n ; therefore, this is an alkene.
(b) C_6H_{14}
n = 6, 14 = 2n + 2; therefore, this is an alkane.
(c) C_{10}H_{18}
n = 10, 18 = 2n – 2; therefore, this is an alkyne.