Transcript Break up line

January 8
Agenda
• Do Now (7 mins)
• Pass out Molar Highways and P.T.’s (2 mins.)
• Molar Highway Review Lecture (15 mins)
• M.H. Full Class Practice Problem (15 mins)
• M.H. Independent Practice Problem (15 mins)
• Exit Question
4 MINUTES:
How many protons are in Sodium (Na)?
How many electrons are in Sodium (Na)?
How many neutrons are in Sodium (Na)?
We will then discuss answers for 3 minutes
The Molar Highway is a Graphic Organizer that we use to make
stoichiometric calculations easier
Mass
of
Atom
Moles
of
Atom
Molecules
of
Atom
-----------------------------------------------------------Break up line-------------------------------------
Mass
Moles
Molecules
The portion of the molar highway below the breakup line, deals
with 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:
Divide by Molar Mass
Mass
Moles
Multiply by Molar Mass
Multiply by A’s Number
Molecules
Divide by A’s Number
The portion of the Molar Highway above the breakup line deals
with 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.
Divide by Atomic Mass
Moles
Mass
of
of
Atom Multiply by Atomic Mass Atom
Molecules
of
Atom
Divide
Multiply
Divide
Multiply
By
By
By
By
Subscript
Subscript
Subscript
Subscript
-----------------------------------------------------------Break up line-------------------------------------
Mass
Moles
Molecules
Divide by Atomic Mass
Moles
Mass
of
of
Atom Multiply by Atomic Mass Atom
Multiply
By
Subscript
Molecules
of
Atom
Divide
By
Subscript
Multiply
By
Subscript
Divide
By
Subscript
-----------------------------------------------------------Break up line------------------------------------Divide by Molar Mass
Mass
Moles
Multiply by Molar Mass
Multiply by A’s Number
Molecules
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 molecules
of carbon, how many grams of CO2 did he break apart?
If I give you 2 moles of CO2, how many grams of carbon (C), do
you have?