Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

by Timberlake, Karen C.

Published by Prentice Hall

ISBN 10: 0321908449

ISBN 13: 978-0-32190-844-5

Chapter 4 - Section 4.7 - Trends in Periodic Properties - Challenge Questions - Page 132: 4.111

Answer

28.09 amu

Work Step by Step

Atomic mass of Si = $(27.977amu\times\frac{92.23}{100}) + (28.976amu\times\frac{4.68}{100}) + (29.974amu\times\frac{3.09}{100})$ = 25.80 amu+ 1.36 amu+ 0.926 amu = 28.09 amu

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