Question

In three moles of ethane (C₂H₆), calculate the number of molecules of ethane.

Answer 1

1 mole of C₂H₆ contains 6.023 × 10²³ molecules of ethane.

∴ Number of molecules in 3 moles of C₂H₆

= 3 × 6.023 × 10²³

= 18.069 × 10²³

∴ The number of molecules of ethane are 18.069 × 10²³