AVAGADRO’S NUMBER. The Mole Dozen: A convenient counting measurement. 1 dozen represents 12 individual objects. eg. 1 dozen particles = 12 particles.

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Presentation transcript:

AVAGADRO’S NUMBER

The Mole Dozen: A convenient counting measurement. 1 dozen represents 12 individual objects. eg. 1 dozen particles = 12 particles 2 dozen particles = 2.5 dozen particles =

The Mole Dozen: A convenient counting measurement. 1 dozen represents 12 individual objects. eg. 1 dozen particles = 12 particles 2 dozen particles = 24 particles 2.5 dozen particles =

The Mole Dozen: A convenient counting measurement. 1 dozen represents 12 individual objects. eg. 1 dozen particles = 12 particles 2 dozen particles = 24 particles 2.5 dozen particles = 30 particles

The Mole Mole: A convenient counting measure used by chemists. 1 mole represents 6.02 x eg. 1 mole = 2 moles = 2.5 moles =

The Mole Mole: A convenient counting measure used by chemists. 1 mole represents 6.02 x eg. 1 mole = 1 X 6.02 x particles 2 moles = 2.5 moles =

The Mole Mole: A convenient counting measure used by chemists. 1 mole represents 6.02 x eg. 1 mole = 6.02 x particles 2 moles = 2 X 6.02 x particles = x particles 2.5 moles = 2.5 X 6.02 x particles = x particles

Types of Particles Types of Particles: Atoms, compounds or molecules Molecules: 1mol H 2 O = 6.02 x H 2 O molecules Atoms: 1mol Na = 6.02 x Na atoms Compounds: 1mol NaCl = 6.02 x NaCl molecules

Finding the number of Particles using Moles X / 6.02 X = 2

Avagadro’s Number Why 6.02 x : It is an observable number. Its convenient to work with. Translation balanced equations: N2N2 3H 2 2NH 3 1 molecule3 molecules2 molecules 1 dozen molecules 3 dozen molecules 2 dozen molecules

Avagadro’s Number Why 6.02 x : It is an observable number. Its convenient to work with. Translation balanced equations: N2N2 3H 2 2NH 3 1 molecule3 molecules2 molecules 1 dozen molecules 3 dozen molecules 2 dozen molecules 1mol nitrogen3mol hydrogen2mol ammonia

Avagadro’s Number Why 6.02 x : It is an observable number. Its convenient to work with. Translation balanced equations: N2N2 3H 2 2NH 3 1 molecule3 molecules2 molecules 1 dozen molecules 3 dozen molecules 2 dozen molecules 1mol nitrogen3mol hydrogen2mol ammonia 6.02 x molecules x molecules x molecules

Molar Ratio Molar ration: the ratio of molecules in a reaction. For the reactant side only. 2Na + Cl 2  2NaCl Molar ratio: 2:1 Sentence explaining the reaction:

Molar Ratio Molar ration: the ratio of molecules in a reaction. For the reactant side only. 2Na + Cl 2  2NaCl Molar ratio: 2:1 Sentence explaining the reaction: Two moles of sodium reacts with one mole of chlorine gas to form two moles of Sodium chloride.

Balancing Equations Remember: Conservation of Mass: The amount of mass of your starting chemicals (reactants) equals the mass of the mass of the final chemicals (products). The number of moles you start with = the number of moles of you end with