Avogadro defined one mole of carbon-12 atoms to have a mass of exactly 12.0 grams. Calculate the number of hydrogen atoms in 1 mole.

A) 1.38 x 1025 atoms

B) 1.66 x 1024 atoms

C) 3.98 x 1023 atoms

D) 6.02 x 1023 atoms

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