For each problem listed in Column A, select from Column B the letter of the conversion factor that is needed to solve the problem. You may need to use more than one conversion factor to solve the problem. Column A Column B 5. Find the number of moles in 23.0g of zinc. 6. Find the mass of 5.01020 zinc atoms. a. 1molZn65.4gZn 7. Find the mass of 2.00 moles of zinc. 8. Find the number of atoms in 7.40g of zinc. b. 65.4g1mol7n 9. Find the number of moles that contain 4.25 c. 1molZn6.021022atomsZn 10. Find the number of atoms in 3.25 moles of zinc. d. 6.021023atoms7n1mol7n