Question

Calculate the no of moles of carbon atom and hydrogen atom in 3 mole of ethane

Answer 1

1 molecule of ethane contains 2 carbon atoms 

so 3 moles of ethane contains 6 mole of carbon atoms.

1 molecule of ethane contains 6 hydrogen atoms 

so 3 moles of ethane contains 18 mole of hydrogen atoms.

1 mole of ethane contains 6.023×10²³ molecules of ethane

so 3 mole of ethane contains 3×6.023×10²³ =18.069 ×10²³ molecules of ethane.

Answer 2

3 moles of ethane contains 6 mole of carbon atoms. so 3 moles of ethane contains 18 mole of hydrogen atoms