Chapter 6

Chemical Reactions and Stoichiometry

In the last chapter, we discussed how atoms combine and are held together by bonds that can be
either ionic or covalent. After they come together, they may lose some of their individual properties
and gain new ones that result from the combination. Water, for example, formed from two
hydrogen atoms and an oxygen atom, does not really behave like the elements hydrogen or oxygen.

A compound is a pure substance that is composed of two or more elements in a fixed proportion.
Compounds can be broken down chemically to produce their constituent elements or other
compounds. All elements, except for some of the noble gases, can react with other elements or
compounds to form new compounds. These new compounds can react further to form yet different
compounds.

Molecular   Weight  and Molar   Mass

Representation  of  Compounds

Types   of  Chemical    Reactions

Net Ionic   Equations

Balancing   Equations

Applications    of  Stoichiometry

Limiting    Reactants