For decades, the chemical/manufacturing/industrial sector has woven a complex web around American life. From/Within/Across its insidious reach extends into our homes/air/water, poisoning/compromising/contaminating public health/the environment/our very existence. Unseen/Silent/Subtle threats lurk behind/within/under everyday products, manufactured/

Chemical formulas represent the elements of matter. Grasping these formulas provides a fundamental understanding for exploring the diverse world of chemistry. They reveal information about the kinds of atoms contained in a substance, as well as their relative quantities. A chemical formula can easily show the combination of atoms within a molecule