avagadro’s number. the mole dozen: a convenient counting measurement. 1 dozen represents 12...
TRANSCRIPT
AVAGADRO’S NUMBER
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 1023.
eg. 1 mole = 2 moles = 2.5 moles =
The Mole
Mole: A convenient counting measure used by chemists. 1 mole represents 6.02 x 1023.
eg. 1 mole = 1 X 6.02 x 1023 particles 2 moles = 2.5 moles =
The Mole
Mole: A convenient counting measure used by chemists. 1 mole represents 6.02 x 1023.
eg. 1 mole = 6.02 x 1023 particles 2 moles = 2 X 6.02 x 1023 particles =
12.04 x 1023 particles 2.5 moles = 2.5 X 6.02 x 1023 particles =
15.06 x 1023 particles
Types of Particles
Types of Particles: Atoms, compounds or molecules
Molecules: 1mol H2O = 6.02 x 1023 H2O molecules
Atoms: 1mol Na = 6.02 x 1023 Na atoms
Compounds: 1mol NaCl = 6.02 x 1023 NaCl molecules
Finding the number of Particles using Moles
12.04 X 1023 / 6.02 X 1023 = 2
Avagadro’s NumberWhy 6.02 x 1023 : It is an observable number. Its
convenient to work with.Translation balanced equations:
N2 3H2 2NH3
1 molecule 3 molecules 2 molecules
1 dozen molecules
3 dozen molecules
2 dozen molecules
Avagadro’s NumberWhy 6.02 x 1023 : It is an observable number. Its
convenient to work with.Translation balanced equations:
N2 3H2 2NH3
1 molecule 3 molecules 2 molecules
1 dozen molecules
3 dozen molecules
2 dozen molecules
1mol nitrogen 3mol hydrogen 2mol ammonia
Avagadro’s NumberWhy 6.02 x 1023 : It is an observable number. Its
convenient to work with.Translation balanced equations:
N2 3H2 2NH3
1 molecule 3 molecules 2 molecules
1 dozen molecules
3 dozen molecules
2 dozen molecules
1mol nitrogen 3mol hydrogen 2mol ammonia
6.02 x 1023
molecules18.06 x 1023
molecules12.04 x 1023
molecules
Molar Ratio
Molar ration: the ratio of molecules in a reaction. For the reactant side only.
2Na + Cl2 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 + Cl2 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