Question

a sample of propane, C3H8 contains 15.1 moles of carbon atoms. How many total moles of atoms does the sample contain

Answer 1

1 mole of C3H8 contains 3 moles of C and 8 moles of H. So for total no of moles in1 mole of C3H8 is 11(3+8)

For total 11 moles of atoms

15.1 mole of C atoms*11 moles of total atoms/3 moles of C atoms = 55.36 moles of atoms >>>>> answer

second method

15.1 moles of C atoms*8 moles of H atoms/3 moles of C atoms = 40.26 moles of H atoms

total atoms =15.1 moles of C atoms + 40.26 moles of H atoms

                  = 55.36 atoms >>>>> answer