Question

Which of the following contain same number of carbon atoms as in 6 g of carbon-12.
(a) 7.5 g ethane
(b) 8 g methane
(c) both (a) and (b)
(d) none of these

Answer 1

Hey There Here your answer..
6g of C12 contains 3.011×10^23 atoms of C12
So, (b) i.e. 8g CH4 ( methane) will have same no. of atoms as in 6g of C12
The reason behind this is 6g of C12 contains 0.5 mol and 8g CH4 also contains 0.5 mol. Since 1 mol of anything contains 6.022×10^23 atoms therefore 0.5 mol of anything will contain equal no. of atoms i.e. 3.011×10^23 atoms.

Hope This Will help...