Question

Calculate the number of moles present in 9 g of ethane.

Answer 1

Given conditions ⇒

Mass of the Ethane = 9 g.
Chemical Formula of the Ethane = C₂H₆
∴ Molar mass of the ethane = 12 × 2 + 1 × 6
 = 24 + 6
 = 30

∵ No. of moles = Mass/Molar mass
∴ No. of moles of the Ethane = 9/30
   = 3/10
   = 0.3 moles.


Hence, the number of the moles in 9 g of the Ethane is 0.3 moles.

Hope it helps.

Answer 2

Hope my answer helps you