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For each of the numbers listed below, determine the number of significant figures. a) 4.21 х 10-4 О1 02 О з О4 О5 Об О7 О в О9 О 10 b) 3.205 х 10-4 О1 02 Оз О4 О5 Об О7 Ов О9 10 с) 2.8000 x 10 4 О1 02 Оз О4 О5 O 6 O 7 Ов О9 0 10 d) pH = 13.4 О1 О2 Оз О4 Об О7 О в О9 10 e) рОН %—D 5.430 О1 02 Оз О4 О5 Об О7 Ов О9 0 10

For each of the numbers listed below, determine the number of significant figures. a) 4.21 х 10-4 О1 02 О з О4 О5 Об О7 О в О9 О 10 b) 3.205 х 10-4 О1 02 Оз О4 О5 Об О7 Ов О9 10 с) 2.8000 x 10 4 О1 02 Оз О4 О5 O 6 O 7 Ов О9 0 10 d) pH = 13.4 О1 О2 Оз О4 Об О7 О в О9 10 e) рОН %—D 5.430 О1 02 Оз О4 О5 Об О7 Ов О9 0 10

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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For each of the numbers listed below, determine the number of significant figures. a) 4.21 × 10-4 1 O 2 O 4 6 O 7 O 8 O 10 b) 3.205 × 10-4 O 1 O 2 3 O 4 O 5 O 6 O 7 O 10 c) 2.8000 × 10 O 1 O 2 O 5 O 6 O 7 O 10 3 4 d) pH = 13.4 O 1 O 2 6 O 7 O 8 O 10 4 9. e) рОН — 5.430 O 1 O 2 O 3 4 O 6 O7 O 8 O 10
Transcribed Image Text:For each of the numbers listed below, determine the number of significant figures. a) 4.21 × 10-4 1 O 2 O 4 6 O 7 O 8 O 10 b) 3.205 × 10-4 O 1 O 2 3 O 4 O 5 O 6 O 7 O 10 c) 2.8000 × 10 O 1 O 2 O 5 O 6 O 7 O 10 3 4 d) pH = 13.4 O 1 O 2 6 O 7 O 8 O 10 4 9. e) рОН — 5.430 O 1 O 2 O 3 4 O 6 O7 O 8 O 10
Expert Solution
Step 1

To determine the number of significant figures in a number use the following 3 rules:

  1. Non-zero digits are always significant
  2. Any zeros between two significant digits are significant
  3. A final zero or trailing zeros in the decimal portion ONLY are significant
Step 2

a) 4.21×10-4

Number of significant figures = 3

b) 3.205×10-4

Number of significant figures = 4

c) 2.8000×10-4

Number of significant figures = 5

 

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