January 7

In 3 minutes, diagram any atom, and label its 3 parts.

We will then discuss answers for 3 minutes

The Molar Highway is a Graphic Organizer that we use to makestoichiometric calculations easier

Mass Moles Molecules

Moles Molecules of of

Atom Atom

Mass ofAtom

-----------------------------------------------------------Break up line-------------------------------------

The portion of the molar highway below the breakup line, dealswith whole compounds:

Example: CO2

In order to move between Mass, Moles and Molecules, you must Be able to perform any one of the following mathematical Calculations:

Mass Moles MoleculesDivide by Molar Mass

Multiply by Molar Mass

Multiply by A’s Number

Divide by A’s Number

In your Group…try the following problem

How many grams of O2 are in 1.2 X 1024 molecules of O2 ?

The portion of the Molar Highway above the breakup line dealswith parts of a compound. This is why we call it the breakup line, because we know that if we cross it, we have to break up our compound, or vice versa.

Mass Moles Molecules

Moles Molecules of of

Atom Atom

Mass ofAtom

-----------------------------------------------------------Break up line-------------------------------------

MultiplyBySubscript

MultiplyBySubscript

DivideBySubscript

DivideBySubscript

Divide by Atomic Mass

Multiply by Atomic Mass

Mass Moles Molecules

Moles Molecules of of

Atom Atom

Mass ofAtom

-----------------------------------------------------------Break up line-------------------------------------

MultiplyBySubscript

MultiplyBySubscript

DivideBySubscript

Divide by Atomic Mass

Multiply by Atomic Mass

DivideBySubscript

Divide by Molar Mass

Multiply by Molar Mass

Multiply by A’s Number

Divide by A’s Number

If you have 18 grams of H2O, how many grams of Oxygen (O) do you have?

If you have 18 grams of H2O, how many molecules of Hydrogen (H)do you have?

How many moles of Carbon (C) are in 88 grams of CO2?

Extra Tough:

A scientist breaks apart CO2 gas and collects 1.2 X 1024 moleculesof carbon, how many grams of CO2 did he break apart?

What is a mole?

What is the Molar Highway?