The Mole The Basic Chemical Unit. A Mole is : A chemical quantity A Mole of any substance is Chemically equivalent to a mole of any other substance.

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Presentation transcript:

The Mole The Basic Chemical Unit

A Mole is : A chemical quantity A Mole of any substance is Chemically equivalent to a mole of any other substance

A Mole is : Anything that has the same number of particles as the number of atoms in exactly 12.0 grams of Carbon-12.

Avogadro’s Number 6.02 x 10 23

Representative Particles HOW TO COUNT

Elements Atoms

Covalent Compounds Molecules

Ionic Compounds Formula Units

One Mole of : Carbon = 6.02 x Carbon Atoms Silicon = 6.02 x Silicon atoms

One Mole of : CO 2 = 6.02 x Carbon DiOxide Molecules HNO 3 = 6.02 x Nitric Acid Molecules

One Mole of : Platinum = _______ Platinum Atoms Scandium = ______ Scandium atoms

One Mole of : CaCO 3 = _______ Calcium Carbonate molecules C 12 H 22 O 11 = ______ Sugar molecules

Molar Mass

Defination The mass of one mole of a substance.

One Mole of : Carbon = 12.0 g Silicon = 28.1 g Barium = g Helium = 4.0 g

One Mole of : Element = (molar mass) g Compound = (mol mass) g Substance = (mol mass) g

One Mole of : Aluminum = ____ g Arsenic = ____ g Silver = _____ g Xenon = _____ g

One Mole of : CO 2 = 44.0 g SO 3 = 80.1 g BaSO 4 = g (NH 4 ) 3 PO 4 = g

One Mole of : CaCl 2 = ____ g CoCO 3 = ____ g Pb(NO 3 ) 2 = _____ g Al 2 (CO 3 ) 3 = _____ g

One Mole of : CaCl 2 = g CoCO 3 = g Pb(NO 3 ) 2 = g Al 2 (CO 3 ) 3 = g

Molar Volume

The volume of one mole of

STP Standard Temperature and Pressure

1 mole of STP 22.4 liters

Does not matter what the gas is.

Converting between Moles and Grams: 1 mol = (molar mass) g Conversion factors: __ mol x ___ g x

Converting between Moles and Grams: 2.8 mol Ag = ? g Ag 2.8 mol x 57.9 g Mg = ? mol Mg 57.9 g x

Converting between Moles and Atoms: 2.8 mol Ag = ? atoms of Ag 2.8 mol x 57.9 g Mg = ? atoms Mg 57.9 g x

Convert 14.9 g H 2 Convert 14.9 g H 2 O into moles 14.9 g x = mol g H 2 O 1 mol

Convert 3.4 mol H 2 Convert 3.4 mol H 2 O into grams 3.4 mol x g H 2 O 1 mol = 61.2 grams

Convert 25.1 g of CO 2 Convert 25.1 g of CO 2 into moles: 25.1 g x 1 mol CO g CO 2 = mol

Convert 35.8 g H 2 Convert 35.8 g H 2 O into molecules: 35.8 g x = 1.20x10 24 molecules g H 2 O 6.02x10 23 molecules

Convert moles of Cl 2 Convert moles of Cl 2 into molecules: mol x = 1.15x10 23 molecules 1 mol 6.02x10 23 molecules

Convert 2.88x10 24 molecules of Cl 2 Convert 2.88x10 24 molecules of Cl 2 into moles: 2.88x10 24 molecules x = 4.78 moles 1 mol 6.02x10 23 molecules

What is the mass of 15 atoms of gold? 15 atoms x 6.02x10 23 atoms g 1 mole X

What is the mass of 15 atoms of gold? = 4.91 x g