Chemical Composition

Front 1

Definition of Molar Mass

Back 1

Represents the mass of one mole in a compound

Front 2

Definition of Empirical Formula

Back 2

The formula of a compound that represents the smallest whole number ratio of atoms present (Simplest formula)

Front 3

Steps for calculating empirical formulas

Back 3

1) Calculate the mass of each type of atom present
2.)Convert each amount of atoms present into moles
3.)Divide the # of moles of each atom present by the smallest number of moles calculated
4.)Multiply the #'s from step 3 by the smallest whole # that will convert them all to whole #'s

Front 4

Mass Percent

Back 4

(mass of the element present in one mole of the compound) divided by (mass of 1 mol of compund) x 100

Front 5

Steps of Percent Composition

Back 5

1.)Find the mass percent in grams
2.)compare mass (g) of each element to the overall compound
3.) x 100

Front 6

Definition of Molecular Formula

Back 6

The actual formula

Front 7

Steps for finding the molecular formula

Back 7

1.)The empirical formula of the compound
2..) (molar mass of the M.F.)/(molar mass of the E.F.)
*If you do not get a whole number, multiply by the smallest # that will get you one
3.)multiply the empirical formula by that number

Front 8

1 amu =

Back 8

1.66x10^24 grams