Question

In 3 moles of ethane calculate the following.
(a) no of moles of C atom.
(b) no of moles of H atom.
(c) no. of molecules of ethane.

Answer 1

Ethane is \(\sf\LARGE C_2H_6\)

As you can see, there are 2 C atoms in ethane. So 1 mole ethane contains 2 moles carbon. Now we have 3 moles of ethane, So there are 3*2= 6 moles carbon.

Can you do the same for hydrogen?

For question C, multiply the amount of moles ethane with avogadro's number. This is \(\sf 6.022*10^{23}\)

So \(\sf\large 3*(6.022*10^{23})\)