How many moles of HCl are represented by 1.0 X 10^19 Hcl molecules?

Answer 1

1 mole = 6.02x10²³ molecules

Number of HCl moles = 1.0 X 10¹⁹ Hcl molecules x 1 mole/ 6.02x10²³ molecules = 1.66 x 10^-5 moles