The diameter of a hydrogen atom is 212 pm. Find the length in kilometers of a row of 6.02 X 10^{23} hydrogen atoms.

The diameter of a ping pong ball is 4.0 cm. Find the length in kilometers of a row of 6.02 X 10^{23} ping pong balls.

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Our data indicates that this problem or a close variation was asked in Chemistry: A Molecular Approach - Tro 2nd Edition. You can also practice Chemistry: A Molecular Approach - Tro 2nd Edition practice problems.