8. Which of the following single bonds is least polar? a. N-H
b. H-F
C. O-F
d. I-F
e. O-H

Based on the equation and the information in the table, what is the enthalpy of the reaction?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.