Introductory Chemistry: A Foundation
8th Edition
ISBN: 9781285199030
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 2, Problem 31QAP
For the pin shown in Fig. 2.5, why is the third figure determined for the length of the pin uncertain? Considering that the third figure is uncertain, explain why the length of the pin is indicated as 2.85 cm rather than, for example, 2.83 or 2.87 cm.
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a. Using the correct rules for multiplication/division and significant figures provide the answer for the following calculation.
6.98 x 89.44 =
b. Using the correct rules for multiplication/division and significant figures provide the answer for the following calculation.
7831 x 76.987 =
c. Using the correct rules for addition/subtraction and significant figures provide the answer for the following calculation.
7831 + 76.987 =
d. Using the correct rules for addition/subtraction and significant figures provide the answer for the following calculation.
7831.67 + 76.987 =
e. Using the correct rules for addition/subtraction and significant figures provide the answer for the following calculation.
7831.67 + 76.987 =
For the following division problem:
(6.626 x 10–30) / (9.63 x 107) = ?
What is the answer reported to the correct number of significant figures? (Assume both values are measured values.)
6.88 x 10^-38 (expressed in scientific notation)
6.9 x 10^-37 (expressed in scientific notation)
6.88 x 10^-24 (expressed in scientific notation)
6.881 x 10^-38 (expressed in scientific notation)
Chapter 2 Solutions
Introductory Chemistry: A Foundation
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