2. • 1. Draw a line down from the arrow
• 2. List elements on both sides of arrow
• 3. List how many atoms of each element
are on both sides
• 4. Add coefficients where needed to
balance atoms on both sides
3. Rules:
• Always add coefficients, never add or
subtract subscripts
• Never break apart molecules (coefficients
added to molecules get multiplied with all
elements in the molecule)