ACS Analytical Chemistry Practice Exam

Which prefix has the value 10^-1?

milli- micro- nano- deci-

Correct Answer:

deci-

Explanation:

Metric prefixes indicate powers of ten that multiply the base unit. Deci- represents 1/10, i.e., 10^-1. In comparison, milli- is 1/1000 (10^-3), micro- is 1/1,000,000 (10^-6), and nano- is 1/1,000,000,000 (10^-9). So a deci- unit is one tenth of the base unit (for example, a decimeter is 0.1 meters). Therefore, the prefix with the value 10^-1 is deci-.

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