Concept explainers
For each number, underline the zeroes that are significant and draw an x through the zeroes that are not.
a. 1,050,501 km
b. 0.0120 m
c. 0.0000000000002 s
d. 0.001090 cm
Interpretation: The zeroes that are significant should be underlined and
should be drawn through the zeroes that are not, for the following numbers:
Concept introduction:
- Significant figures are the numbers which are reported in a measurement including the estimated digit.
To determine: The zeroes that are significant and draw a
Answer to Problem 1E
Solution:
Explanation of Solution
Significant figures:
Significant figures are the numbers which are reported in a measurement including the estimated digit.
The following are the rules that decide whether a zero is significant or not:
1. Any zeroes between two or more non-zero digits are significant.
2. Trailing zeroes in the decimal number are significant.
3. Zeroes that are present at the beginning of a decimal number are not significant.
4. Zeroes used as place holders in large numbers without a decimal are not significant.
a. Given:
The zeroes in
b. Given:
The zero which is present after the number 2 in
c. Given:
The zeroes in
d. Given:
The zero which is present after the digit 9 in
Therefore, for given numbers, the zeroes that are underlined are significant and the zeroes that are crossed out are no significant,
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Chapter A2 Solutions
Chemistry: Structure and Properties
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