Calculate the number of hydrogen atoms in a 70.0g sample of camphor (C₁₀H₁₆O), round to 3 sig figs.
a) 2.06 × 10²⁴ hydrogen atoms
b) 1.04 × 10²⁴ hydrogen atoms
c) 6.51 × 10²³ hydrogen atoms
d) 3.80 × 10²³ hydrogen atoms