11 12
56
7. How many atoms are in 0.250 moles of Rb? x 6.02x102 atoms
1 mol
8. How many moles are in 2.91 X 1022 atoms of He? X
1 mol
6.02 x 104 atoms
9. How many moles are in 1.23 X 1050 molecules of H,?
1 mol
6.02 x 10-molecules
10. How many moles are in 5.25 X 1025 atoms of Au? X
1 mol
6.02 x 1023 atoms
1 mol
11. How many moles are in 7.14 X 1035 molecules of O,? *
6.02 x 10-molecules
12. How many moles are in 8.11 X 1020 molecules of CH.? X
1 mol
6.02 x 1023
molecules
Il