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Molar Relationships

Pair = 2

Dozen = 12Names associated with an amountCan you think of any more?????

The mole (mol) is the amount of a substance that contains as many elementary entities as there are atoms in exactly 12.00 grams of 12C

1 mol = NA = 6.0221367 x 1023Avogadros number (NA) The Mole..

What is the mass of one mole of:CSCuFeHg3.2Molar MassThe Mass of 1 mole (in grams)Equal to the numerical value of the average atomic mass (get from periodic table) 1 mole of C atoms= 1 mole of Cu atoms =1 mole of S atoms = 1mole of Hg atoms = 1 mole of Fe atoms =Learning Check!Find the molar mass (usually we round to the tenths place)1 mole of Br atoms1 mole of Sn atoms=79.9 g/mole= 118.7 g/moleMolecular mass (or molecular weight) is the sum ofthe atomic masses (in amu) in a molecule.

SO21S32.07 amu2O+ 2 x 16.00 amu SO264.07 amuFor any molecule molecular mass (amu) = molar mass (grams)1 molecule SO2 = 64.07 amu1 mole SO2 = 64.07 g SO2 3.3Lets try some more..Molar Mass of Molecules and CompoundsMass in grams of 1 mole equal numerically to the sum of the atomic masses1 mole of CaCl2 = 111.1 g/mol 1 mole Ca x 40.1 g/mol + 2 moles Cl x 35.5 g/mol = 111.1 g/mol CaCl2Practice with this one: 1 mole of N2O4 = Learning Check!Molar Mass of K2O = ? Grams/mole

B. Molar Mass of antacid Al(OH)3 = ? Grams/mole

Learning CheckProzac, C17H18F3NO, is a widely used antidepressant that inhibits the uptake of serotonin by the brain. Find its molar mass.

So, if one mole = the formula mass how do we calculate.The mass of 05 mol of Calcium Carbonate

The mass of 2.25 mol of Sodium ChlorideHow many moles are there in? 100 g of Magnesium Hydroxide ?

64 g of Oxygen ?Converting to # of atoms or moleculesHow many atoms are in 3.00 moles of Iron?

How many atoms are in 0.25 moles of Water? Molar MassThe molar mass of a compound is found by adding Together the molar masses of all of its elements, takingInto account the number of moles of each element present.

Homework: pg 157 # 5-11