2.49 Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each of the following: a. A bee flies at an average speed of 3.5 m per second. b. The Daily Value (DV) for potassium is 3.5 g. c. An automobile traveled 26.0 km on 1 L of gasoline. d. The pesticide level in plums was 29 ppb. e. Silicon makes up 28.2% by mass of Earth's crust.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter1: The Nature Of Chemistry
Section: Chapter Questions
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2.49 Write the equality and two conversion factors, and identify the
numbers as exact or give the number of significant figures for
each of the following:
a. A bee flies at an average speed of 3.5 m per second.
b. The Daily Value (DV) for potassium is 3.5 g.
c. An automobile traveled 26.0 km on 1 L of gasoline.
d. The pesticide level in plums was 29 ppb.
e. Silicon makes up 28.2% by mass of Earth's crust.
Transcribed Image Text:2.49 Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each of the following: a. A bee flies at an average speed of 3.5 m per second. b. The Daily Value (DV) for potassium is 3.5 g. c. An automobile traveled 26.0 km on 1 L of gasoline. d. The pesticide level in plums was 29 ppb. e. Silicon makes up 28.2% by mass of Earth's crust.
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