Computer Exercise Description:

In this exercise you will be given nine unbalanced chemical equations and asked to balance them. To balance chemical reactions requires the ability to write chemical formulas for the molecules present in the reaction. (If you are not sure how to write formulas, you should either review Sections 2.4 and 4.2 of The Chemical World or review the introduction of the Chemical Formulas computer exercise.)

Since it would be difficult to use graphics (like the pictures shown below) for writing chemical equations, a simpler method is used. The sample reaction given above may also be written as:

N₂ + 3H₂ 2NH₃

For the first four reactions you will need to write the equations in graphical (drawn-out with spheres for atoms) and written form. When drawing these out do not worry about using various colors for each type of atom. The final six reactions should be given only in the written form.

Atom Type	Color of Sphere
Carbon	Dark Gray
Chlorine	Green
Fluorine	Yellow/Orange
Hydrogen	Light Gray/White
Nitrogen	Dark Blue
Oxygen	Red