Question

Calculate the number of moles in 12.04× 10^23 molecules hydrogen ion

Answer 1

You want H ions or do you want H2 molecules. What follows is for H^+ (hydrogen ions).

1 mol H^+ will contain 6.02E23 individual H^+.
12.04E23 H^+ x ( 1 mole/6.02E23 H^+) = ?