How many H₃PO₄ molecules are there in 1.6 × 10¹ moles H₃PO₄?
a) 9.6 × 10²³ molecules
b) 3.84 × 10²³ molecules
c) 9.6 × 10²⁴ molecules
d) 3.84 × 10²⁴ molecules