Multiple Choice
Which of the following correctly lists the metric prefixes kilo-, centi-, milli-, and micro- in order from largest to smallest?
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1. Intro to General Chemistry
Metric Prefixes
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Which quantity in the following pair is smaller?
A
155 pm
B
7.8 x 10–9 cm
Verified step by step guidance1
Convert both quantities to the same unit to make a direct comparison. Let's convert picometers (pm) to centimeters (cm) since the second quantity is already in cm.
Recall that 1 pm = 1 x 10^-12 meters and 1 cm = 1 x 10^-2 meters. Therefore, 1 pm = 1 x 10^-10 cm.
Convert 155 pm to cm using the conversion factor: 155 pm * (1 x 10^-10 cm/pm).
Calculate the result of the conversion to find the equivalent length in cm for 155 pm.
Compare the converted value of 155 pm in cm with 7.8 x 10^-9 cm to determine which is smaller.
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