BIG PICTURE
Smith (11/22/13)
-Atoms and molecules (substances) react based on particle units. They do not combine
based on their mass.
-A mole is a ginormous amount of particle units (6.02 x 1023 ) and we use it so we don't
have to work with ginormous numbers.
-We convert mass (grams) to moles by using the molar mass of the particle unit or
substance.
- We find the molar mass of the particle unit or substance by finding the number of each
atom and then adding these up. The units are gram/mole or gram/mol.
NaBr (ionic or covalent)
1 Na =
1 Br =
_______________ Molar mass of NaBr or _____________
H 3PO4 (ionic or covalent) 3 H =
1P=
4O=
_______________ Molar mass of H 3PO4 or____________
Na 3PO4 (ionic or covalent) 3 Na =
1P=
4O=
_______________ Molar mass of Na3PO4 or____________
HBr (ionic or covalent)
1H=
1 Br =
_______________ Molar mass of HBr or _____________
Summarize in my own words:
Puzzle:
Substances react in ___________ based on ____________________not based on
__________.
We convert ________ to _________ using the ________ _____ of the substance.
To avoid using ________________ we use ______ instead of _______________.
We find the molar mass of the _____________ by finding the _________ of each
atom and then ____________ them up. The units of molar mass is ___________.
Once we have each of the reactants expressed in ___________ it is easier to determine
how many of each __________ we will need in the reaction chemistry.
Word Bank : substance, number, adding, ginormous numbers, grams, moles, molar mass,
mass, particle unit, ratio's, grams/mole, reactant, atomic mass
Draw a picture of one of the ideas listed above or incorporate them all together.