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Molar Mass
 Grams per mole of a compound or molecule
 Calculated by adding up bottom number on the periodic table.
 SYMBOL: Fancy italisized M

Grams per mole of a compound or moleculeCalculated by adding up bottom number on the periodic table. SYMBOL: Fancy italisized M
Molar Mass

What is the molar mass of iron if .04530 moles of iron massed 2.53g?
 Molar mass equals Mass divided by number
 so 2.53/.04530 = 55.847

How do you convert grams to moles or moles to grams
 Determine how many grams are given in the problem.
 Calculate the molar mass of the substance.
 Divide step one by step two.

Solute
 This is what gets dissolved
 Example: salt in salt water solution

Solvent
 This is what does the dissolving
 Example:water in saltwater solution

What is the definition of concentration?
concentration = number / volume

Formula for N in concentration.
CxV=N

N in chemistry formulas
 It's the count of something
 Number of molecules
 individuals, pairs, dozens, moles

Molarity
Concentration expressed as the number of moles of solute per liter of solution

Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 3.00 of aluminum sulfate. Al2(SO4)3
moles of = 6.00,9.00,36.0

Multiply number of moles of individual element by the total, so in this case everything will be multiplied by 3.
 3x2= 6 moles of AL
 3x3=9 moles of S
 3x12= 36 moles of O

