If a sample of H₂O contains 9.02 × 1023 atoms, how many grams of H₂O is this?

A) 3.01 × 10⁻¹ grams.
B) 1.81 × 10⁻¹ grams.
C) 5.35 × 10⁻¹grams.
D) 1.80 × 10⁻¹ grams.