Atomic mass unit (amu)
is used to describe the mass of an atom expressed.
Atomic Mass
the mass of an atom expressed in amu's.
Formula mass
the sum of the atomic masses of all the atoms in a compound.
Mole
the number of atoms of that element equal to the number of atoms.
Unit
A mole is a _______. It can be looked at like a name for a group of things.
6.02 x 10 ^23
Avagadro's number
Given particles/1 x 1 Mole/6.02 x 10 ^23
Particles to Moles
Given moles/1 x 6.02 x 10 ^23 particles/1 Mole
Moles to Particles
Molar mass
the mass in grams of 1 mole of a substance.
Given mole/1 x Molar mass/1 mole
Mole to Mass
Given mass/1 x 1 Mole/Molar mass
Mass to Mole
Percentage composition
the mass of each element in a compound compared to the entire mass of the compound and multiplied by 100 percent.
% element=atomic mass/molar mass x 100
Percent Composition Formula
Empirical Formula
a formula that gives the simplest whole-number ratio of the atoms of the elements.
Empirical formula
_______ can be determined from analysis or % composition.
Molecular formula
gives the actual number of atoms of each element in a compound.