Facts
What is 1mol the equivalent of
6.02x1023 Representative particles
An atom
The percent by mass of an element
Number of grams of the element divided by the number of grams of the compound multiplied by 100%
6.02x1023?
Avagadros number
Two or more atoms
A molecule
Empirical to molecular formula
Divide the actual molar mass by the empirical formula mass. You get a whole number to increase each coefficient in the empirical formula
What part of an atom on the periodic table has the mass of 1 mol?
The decimal.
These are typically nonmetal
Molecules
Get ratio from percent to composition (assuming you have 100g)
Percentage becomes grams
Convert grams to moles
Find lowest whole number ratio by dividing by the smallest number
These are all equal
1 mol, molar mass, Avagadros number, Representative particles, 22.4L of gas @STP
Smallest pieces of a substance
Molecular compound: molecule
Ionic compound: formula unit
Element: Atom
Empirical formula
Lowest whole number ratio of atoms in a compound.