Question

number of moles present in 12g of ethane​

Answer 1

molecular mass of ethane is 30 g

so in 12 g there are 12/30=2/5 moles

Answer 2

Answer:

Of the miles of 9g of the ethane is 0.3 moles then the 12g of the ethane is 0.4 moles.

hope it helps you mate.....