How many moles of C3H8 contain 4.95 x 10^24 hydrogen atoms?

Answer 1

Prelim answer....approximately one mole of C3H8.

By dividing 4.95x10^24 atoms of hydrogen by avagadro's # of 6.022x10^23 atoms/mole gives 8.22mole of hydrogen.

Divide that by 8, since there are 8 moles of H per each mole of C3H8. final answer: 1.027 rounds off to 1.03 moles of C3H8

Answer 2

Let C3H8 be called P

4.95x10^24Hatom x 1Pmolecule/8Hatom x 1molP/6.02x10^23Pmolecule = 1.02 moles P