Chapter 3 Flashcards
(20 cards)
1 mole =
6.022 x 10^23
the molar mass of an element=
amu
Mass to Moles
grams/ molar mass = moles
Moles to Particles
moles x (6.022x10^23)= particles
Particles to Moles
particles/(6.022x10^23)= moles
Moles to Mass
moles x molar mass = grams
Compound Mass Formula=
the sum of all elements in the compound
Percent Composition (definition)
percentage by mass each element is in a compound
Percent Composition (Formula)
mass of an element in compound/ mass of the compound
Empirical Formula
gives the relative number of atoms of each element in a compound (ratio)
Molecular Formula
actual number of atoms in a molecule
Structural Formula
uses lines to represent covalent bonds
Ball and Stick Model
3-D model from school
Formula Unit
smallest, electrically neutral collection of ions
Naming Binary Acids
hydro+ base of nonmetal-ic + acid
Naming Oxyacids
base of oxcyanion + -ic(ate) or -ous(-ite) + acid
Naming Ions (fixed charge)
metal + base of nonmetal -ide
Naming Ions (varied charge)
metal + charge of metal +base of nonmetal -ide
Naming Nonmetal and Nonmetal
prefix, 1st element + prefix, 2nd element -ide
Combustion Analysis
unknown compound ignites and carbon dioxide and water are weighed to determine the original amount of hydrogen and oxygen to determine original substance
