Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 1 - Chemical Foundations - ChemWork Problems: 107

Answer

$(c)$ and $(e)$ are true

Work Step by Step

a) - Sugar is not a mixture, but a compund. Thus - $False$ b) - Compounds too are pure substances, hence - $False$ c) - Air is a mixture of gases ( Approx 78 % $N_{2}$, 21 % $O_{2}$, 1 % Others) - hence - $True$ d) - Gasoline is a homogeneous mixture made from processing or refining crude oils, and hence - $False$ e) - Compounds $cannot$ be broken down by physical means as the elements inside have strong forces of attraction binding them, and hence, - $True$
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