Chemistry Practice Problems Significant Figures Practice Problems Solution: The circumference of Earth through the poles is 40...

Solution: The circumference of Earth through the poles is 40,008 km. Round this number to four significant figures, and express it in standard exponential notation.

Problem

The circumference of Earth through the poles is 40,008 km. Round this number to four significant figures, and express it in standard exponential notation.

Solution

We're asked to round off the circumference of Earth which is 40,008 km to four significant figures and to express it in standard exponential notation


Recall that a scientific notation expression is composed of three parts:



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