The Mole. What is the a mole? A unit to measure the amount of a substance. Commonly abbreviated mol. The symbol is n.

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Presentation transcript:

The Mole

What is the a mole? A unit to measure the amount of a substance. Commonly abbreviated mol. The symbol is n

Mole Map atoms, molecules, form. units molesgrams volume of a gas (L) use 6.02 x use 22.4 L formula mass

Avogadro's Number 1 mole = 6.02 x 10 23

Avogadro’s Number USED TO DETERMINE THE NUMBER OF PARTICLES THROUGH DIMENSIONAL ANALYSIS o Molecules o Atoms

How many moles are there in … 5.76 x atoms Al 3.75 x atoms C 3.58 x atoms Fe 2.50 x molecules Zn 9.55 mol Al 6.23 mol C mol Fe 4.15 x mol Zn

Moles and Volume

22.4 L = 1 mol

Determine the number of moles… 22.8 L O L H L Xe 5.98 L F mol O mol H mol Xe mol F 2

Mass and the Mole

Molar Mass (M) The mass in grams of one mole of any pure element Units: grams/mol (g/mol)

Atomic Mass The atomic mass of an element is the molar mass of that element. What is the molar mass of manganese?

M=m/n molar mass = grams/moles

Calculate the mass in grams of moles of chromium g Cr

Determine the mass of … 3.57 mol Al 42.6 mol Si 3.45 mol Co 2.45 mol Zn 96.3 g Al 1.20 x 10 3 g Si 203 g Co 1.60 x 10 2 g Zn

Determine the number of moles… 25.5 g Ag g S 125 g Zn 1.00 kg Fe mol Ag mol S 1.91 mol Zn 17.9 mol Fe

How many grams are in 2.5 x atoms of lithium? 2.5 x atoms 6.02 x atoms 1 mol 6.94 g Li