Which pair of molecules is not a polar bond? n – o c – o o – h o – o

A polar bond is determined by electronegativity, or how much each element wants a given electron. The only realistic way to have both atoms want their shared electrons the same amount is to have two of the same element bonded together. Therefore, O-O is a non-polar bond.

m=9

step-by-step explanation:

7m+8=71 subtract   8 from 71 which is 63 than divide it by 7m   equal 9.