Polymers composed of identical monomer units are known as ________.

Any molecule that has a central atom with no lone pairs, and four other, equivalent atoms connected to it, has what shape?

A) Square
B) Triangular
C) Tetrahedral
D) Flat

What is the oxygen source in the unbalanced reaction of gunpowder, KNO_3(s) + C_(s) + S_(s) →?

A) Potassium nitrate
B) Potassium ion
C) Charcoal
D) Sulfur

How are most poisons transported through the body?

A) Via the kidneys
B) By the respiratory system
C) Through the lymph nodes
D) By the circulatory system