객관식
A student measures the length of a metal bar using a ruler marked in millimeters and records a value of 12.36 cm. Which of the following correctly expresses this measurement with the appropriate number of significant figures?
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1. Intro to General Chemistry
Significant Figures
객관식
How many significant figures are contained in the following measurement?
3,482,005 mg
A
0
B
5
C
6
D
7
E
infinite
검증된 단계별 안내1
Identify all the digits in the number 3,482,005 mg. The number is written without any decimal point or scientific notation.
Recall the rule for significant figures: All nonzero digits are always significant.
Zeros between nonzero digits are also significant. These are called captive zeros.
Count each digit, including all nonzero digits and captive zeros, but exclude leading zeros (which are not present here) and trailing zeros without a decimal point (which would be ambiguous).
Sum the total number of significant digits to determine the number of significant figures in 3,482,005 mg.
