Organic Chemistry (8th Edition)

Published by Pearson
ISBN 10: 0321768418
ISBN 13: 978-0-32176-841-4

Chapter 1 - Introduction and Review - Problems - Page 20: Problem 1-9 g

Answer

There are two chains of $CH_3CH_2$ connected to a carbon which is connected to an oxygen.

Work Step by Step

The condensed formula is $(CH_3CH_2)_2CO$. The subscript of 2 indicates that there are 2 chains of $CH_3CH_2$ attached to the Carbon which is double bonded to an oxygen. The Oxygen has two lone pairs of electrons. Each carbon has four bonds, Oxygen has two bonds and hydrogen has one bond.
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