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(a)
Interpretation: The number of significant figures needs to be indicated in the given statement relating unit inch to cm.
Concept Introduction: The significant figures are each digit of a number which is used to express that number to the required accuracy starting from the first non-zero digit in the number.
(a)
Answer to Problem 25A
One inch equivalent to 2.54 cm has unlimited number of significant figures.
Explanation of Solution
From definitions, exact numbers can also arise. For example,
(b)
Interpretation: The number of significant figures needs to be indicated in the given statement indicating 24 homework problems.
Concept Introduction: The significant figures are each digit of a number which is used to express that number to the required accuracy starting from the first non-zero digit in the number.
(b)
Answer to Problem 25A
The number is exact so, it has unlimited number of significant figures.
Explanation of Solution
Exact numbers can also arise from definitions. The number given in this statement is exact. According to this question, 24 problems are given for solving. Thus, these numbers have an unlimited number of significant figures.
(c)
Interpretation: The number of significant figures needs to be indicated in the given statement with
Concept Introduction: The significant figures are each digit of a number which is used to express that number to the required accuracy starting from the first non-zero digit in the number.
(c)
Answer to Problem 25A
Significant figures in
Explanation of Solution
The given number is
(d)
Interpretation: The number of significant figures needs to be indicated in the given statement with 2500 mi needs to be determined.
Concept Introduction: The significant figures are each digit of a number which is used to express that number to the required accuracy starting from the first non-zero digit in the number.
(d)
Answer to Problem 25A
Significant figure of
Explanation of Solution
The given number is 2500, there are 2 non-zeros and 2 zero digits. Since, all non-zero digits are significant and trailing zeros after decimal are significant thus, there are only 2 significant figures that is 2 and 5.
Chapter 5 Solutions
World of Chemistry
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