Explanation:
Molar mass of C2H6= 2×12+6=30
30 g of C2H6 gives 1 mol of C2H6
10.0 g of C2H6 gives 1/30 ×10= 1/3 mol of C2H6
1 mol of C2H6 has 2 mol of Carbon
1/3 mol of C2H6 has 1/3 ×2 = 2/3 Molly of Carbon.
No. of atoms = 2/3× 6.023×10^23
=4.01×10^23
