What is a dozen? A dozen is a quantity (number of items) 1 dozen = items 1 dozen pencils = pencils 1 dozen doughnuts = doughnuts 1 dozen automobiles = automobiles 12 12 12 12

Four score and 7 years ago, our forefathers founded a great nation.. Other Quantity Terms 1 dozen items, = items 1 pair of items = items 1 googol of items = items 1 gross of items, = items 1 score of items = items 12 2 1.00 x 10100 144 20 Four score and 7 years ago, our forefathers founded a great nation..

Introduction to the Mole The mole simply describes a quantity of items, just like the words dozen, googol, pair, score, and gross.

Chemists’ Quantity: The Mole The Chemists’ Dozen Instead of 12, one of mole of something means that you have: To play the movies and simulations included, view the presentation in Slide Show Mode. 6.02 X 1023 Avogadro’s Number

What is a mole? A mole is a quantity (number of items) 1 mole of items = items 1 mole of pencils = pencils 1 mole of doughnuts = doughnuts 1 mole of cars = cars 6.02 x 1023 6.02 x 1023 6.02 x 1023 6.02 x 1023

Why is a mole that number? We use moles to count _____ & ______ We need a really big number to have an amount of atoms that we can see & measure 1 moleCu = ______ atomsCu = _______ g 6.02 x 1023 is how many atoms you need so that the mass in grams = atomic mass 1 mole of lead atoms = ________ grams atoms molecules 6.02 x 1023 63.546 207.2

1 mole 1 mole = = 1 mole The Mole = Wheel Volume of Gas Representative atomic 1 mole mass Mass 22.4 L Representative Particles Volume of Gas at STP 6.02x10 23 Mole Volume of Gas at STP 1 mole 1 mole Mole = = 22.4 Liters # of Items (Atoms / Molecules) 6.02 X 1023 1 mole The Mole Wheel = atomic mass Mass

1 mole 1 mole = = 1 mole The Mole Wheel = # of Items Volume of Gas at STP atomic 1 mole mass Mass 22.4 L Representative Particles Volume of Gas at STP 6.02x10 23 Mole # of Items (Atoms / Molecules) 1 mole 1 mole Mole = = 22.4 Liters 6.02 X 1023 1 mole The Mole Wheel = atomic mass Mass

Introduction to the Mole The mole represents 6.02 x 1023 particles. Avogadro’s number - Standard form 602 000 000 000 000 000 000 000 - 1 mole of shoes = ? - 1 mole of hamburgers = ? - 1 mole of beaker tongs = ?

Introduction to the Mole One mole of paper would make a stack that would reach to the moon more than 80 billion times. One mole of pennies would reach to the sun and back 25,227,297,297,297,295 times One mole of watermelon seeds would be found inside a melon slightly larger than the moon. Enough soft drink cans to cover the surface of the earth to a depth of over 200 miles. If you had Avogadro's number of unpopped popcorn kernels, and spread them across the United States of America, the country would be covered in popcorn to a depth of over 9 miles.

Introduction to the Mole Molar Mass: The mass of a mole of a substance. Unit will be grams (g) 1 mole of Carbon (C) = 12.01g 1 mole of Copper (Cu) = 63.55g Atomic Mass: The mass of one atom of a substance. Unit will be amu One atom of Carbon (C) = 12.01 amu One atom of Copper (Cu) = 63.55 amu

Introduction to the mole To find the molar mass of a compound: - Multiply the number of atoms for each element by the individual molar mass. - Add the masses of all elements together.

Find the molar mass of the compound NaOH Formula: ______________ Element Number of atoms Molar mass Total mass of element _________ __________ x ___________ = _____________ Total Molar Mass of ______________ equals _____________ 22.990 g/mol Na 1 22.990 g/mol H 1 1.0079 g/mol 1.0079 g/mol O 1 15.999 g/mol 15.999 g/mol NaOH 39.9969 g/mol equals 39.997 g/mol

Converting between moles, atoms, particles, and molecules. To convert between moles, atoms, particles, liters, and molecules, simply use the factor label method. We can use a graphic organizer to help us convert between different amounts of a substance