CHEMISTRY (LL) W/CNCT >BI<
13th Edition
ISBN: 9781260572384
Author: Chang
Publisher: MCG
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Chapter 3, Problem 3.171QP
The following is a crude but effective method for estimating the order of magnitude of Avogadro’s number using stearic acid (C18H36O2) shown here. When stearic acid is added to water, its molecules collect at the surface and form a monolayer; that is, the layer is only one molecule thick. The cross-sectional area of each stearic acid molecule has been measured to be 0.21 nm2. In one experiment it is found that 1.4 × 10−4 g of stearic acid is needed to form a monolayer over water in a dish of diameter 20 cm. Based on these measurements, what is Avogadro’s number?
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Chapter 3 Solutions
CHEMISTRY (LL) W/CNCT >BI<
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