solve D E F G H

3.20. How many of the following are found in 15.0kmol of xy ylene (C8H10) ? (a) kgC8H10; (b) molC8H10; (c) lb-mole C8H10; (d) mol (g-atom) C; (e) molH; (f) gC; (g) gH; (h) molecules of C8H10