Which pair of atoms has the highest electronegativity difference?
a. h – s
b. h – cl
c. n – h
d. o – h
e. c – h

D. O – H

Explanation:

The electronegativity of the elements in the question is:

H (2.20), S (2.58), Cl (3.16), N (3.04), O (3.44), and C (2.55).

Since, the H atom has the lowest electronegativity (2.20) and O atom has the highest electronegativity (3.44).So, O - H pair of atoms has the highest electronegativity difference.

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.

60.0 - there are 3 significant numbers