Sig Figs
Nonzero integers always count
Leading zeros do not count
Sandwich zeros count
Trailing zeros don’t count unless it has a decimal
Exact numbers do not limit the number of sig figs in the answer
Multiplication/Division
Use the same # of sig figs in the result as the number w the fewest sig figs
Addition/Subtraction
The decimal places in the result must be the number of decimal places in the one with the fewest decimal places
The answer should have the same number of trailing zeros as the measurement with the most trailing zeros
Dimensional analysis
Convert to base
1 mole = 6.02 x 10^23
Kangaroos Hopped Down Black Dark Caves, Making Mysterious Noises
Balancing Chemical Reactions
Cats Bring Rice Dishes
Count atoms of each element
Balance one element at a time
Revisit other elements
Double-check!
Reactants are on the left side
Products are on the right side
Coefficients are used to balance the equation
Coefficients also represent the number of moles
Balance the equation so the atom counts match
Check your work and reduce coefficients to the lowest whole numbers
Acids and Bases
Blue to red for acids
Red to blue for bases
Remember acids turn angry