The diameter of a hydrogen atom is 212 pm. Find the length in km of a row of 6.02 x 1023 hydrogen atoms. 1 pm = 10 -12 m.
A. 2.41 x 1019 km
B. 1.28 x 1011 km
C. 3.60 x 1012 km
D. 5.59 x 1023 km
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