Los Angeles Harbor College » Chemistry » Chem 065 - Introductory General Chemistry » Winter 2024

Question #1

How many total valence electrons are in the Lewis structure of CBr4?

A. 6

B. 0

C. 32

D. 8

E. 82

Question #2

The total number of valance electrons to be counted for the Lewis structure of the PO43- polyatomic ion is

A. 8

B. 29

C. 32

D. 26

Question #3

If the electronegativity difference between elements X and Y is 0.3, the bond between the elements X-Y is

A. polar covalent.

B. nonpolar covalent.

C. nonpolar ionic.

D. ionic.

E. impossible.

Question #4

The shape of the ammonia molecule ( NH3) is

A. bent

B. linear.

C. trigonal planar

D. tetrahedral

E. trigonal pyramidal

Question #5

Hydrogen sulfide, H2S, has a shape similar to

A. carbon dioxide.

B. carbon monoxide.

C. water.

D. carbon tetrachloride.

E. hydrogen chloride.

Question #6

What is the molecular geometry if you have a double bond, a single bond and a lone pair around the central atom?

A. Trigonal Pyramidal

B. Tetrahedral

C. Linear

D. Bent