the mole. the mole mole: the amount of a substance that contains as many particles as there are in...
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The MOLE
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The Mole
• Mole: the amount of a substance that contains as many particles as there are in exactly 12g of carbon-12
• A mole is similar to a dozen
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Avogadro’s Number
• Avogadro’s number: the number of particles in exactly one mole of a pure substance
• Avogadro’s number = 6.022x1023
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The Mole
• 1 mol = 6.022 x 1023 atoms
• Look it’s a conversion factor!
• Convert 2.56 mols of Ca to atoms
• Convert 5.63 x 1022 molecules of CuBr2 to mols
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MOLAR MASS
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Molar Mass
• Molar Mass: The mass of one mole of a substance
• Unit for molar mass is g/mol
• Molar mass is numerically equal to the average atomic mass in amu
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Molar Mass
• Molar mass of lithium is 6.941 g/mol or 6.941 g 1 mol
• Molar mass is a conversion factor
• Convert 2.34 mol of Li to g
• Convert 150 g of Pb to mol
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Molar Mass
• You can also find the molar mass for a molecular compound.
• Convert 54.2 g of silver nitrate to mols.
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MOLE HIGHWAY
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The Mole Highway
Mole
(mol)
Mass
(g)
Amount of a Substance
(atoms)
×𝑚𝑜𝑙𝑎𝑟𝑚𝑎𝑠𝑠
1𝑚𝑜𝑙
×1𝑚𝑜𝑙
𝑚𝑜𝑙𝑎𝑟𝑚𝑎𝑠𝑠
×1𝑚𝑜𝑙
6.022×1023𝑎𝑡𝑜𝑚𝑠
×6.022×1023𝑎𝑡𝑜𝑚𝑠
1𝑚𝑜𝑙
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Using the Mole Highway
• Convert .0025 g of potassium to mol
• Convert 2.22 x 1021 atoms of copper to mol
• Convert 589 g of oxygen to molecules
• Convert 5.67 x 1025 molecules of zinc nitrate to grams
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TRY IT!!!!
• Convert 859 g of Co to mol
• Convert 9.88 x 1022 atoms of K to mol
• Convert 52.67 mol of nickel (II) chloride to g
• Convert 12.3 g of potassium permanganate to molecules