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. 0

B. 6

C. 32

D. 82

E. 8

Question #2

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

A. 29

B. 8

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. nonpolar ionic.

B. ionic.

C. polar covalent.

D. nonpolar covalent.

E. impossible.

Question #4

The shape of the ammonia molecule ( NH3) is

A. tetrahedral

B. trigonal pyramidal

C. trigonal planar

D. linear.

E. bent

Question #5

Hydrogen sulfide, H2S, has a shape similar to

A. carbon dioxide.

B. water.

C. hydrogen chloride.

D. carbon tetrachloride.

E. carbon monoxide.

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. Tetrahedral

B. Bent

C. Trigonal Pyramidal

D. Linear