The correct answer is C, the measurement that contains two significant figure is 0.0000 44 L. All other options provided are not correct because they have three significant figures.
- 0.0004 00 L has three significant figures
- 0.0004 04 L has three significant figures
- 0.0004 40 L has three significant figures.
Further Explanation
In significant rules, the precision of measurement depends on the number of digits reported and significant figures are also the digits that are reported.
The following significant rules are used to determine the number of significant figures in a number.
- Non-zero digits such as 1, 2,3,4,5,6,7,8 are always significant.
- Any zeros that are between significant digits are significant.
- For example 105 is 3 significant figures, 13.07 is 4 significant figure and 100 is 1 significant figure.
- A trailing Zero or final zeros in the decimal portion only are significant. For example .700 or .632000 (the zeros are significant), .007 or .000768 (the zeros are significant)
However, you can use the following rules for addition and subtraction
- You should count the number of significant figures in the decimal portion only of each number
- You should subtract or add in the normal fraction
Significant figures are also known as significant digits or decimal places.
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KEYWORDS:
- significant figures
- significant rules
- addition
- decimal places
- significant digits
