Question

If $3$ moles of ethane $\left(C_2{H}_6\right)$ are given, calculate the following:
(i) Number of moles of carbon atoms.
(ii) Number of moles of hydrogen atoms.
(iii) Number of molecules of ethane.

Answer 1

We are given $3$ moles of ethane.

(i) Number of moles of carbon atoms $=3\times 2=6mol$

(ii) Number of moles of hydrogen atoms $=3\times 6=18mol$

(iii) Number of molecules of ethane $=3\times 6.023\times {10}^{23}=1.8069\times {10}^{24}$