how big is a mole?
how high would a stack of 1 mol of paper be?
What do you call a tenth grader taking chemistry?
A sophmole!
What’s a “representative particle”?
-the type of unit present in a substance:•atoms
•diatomic molecules
•molecules
Examples:
1 mole H2O – 6.02 X 1023 molecules H2O1 mole Fe – 6.02 X 1023 atoms Fe
On which American mountain was Avogadro’s face carved in stone?
Mt. Rushmole!
How many atoms are in 2.12 moles of propane (C3H8)?
Known: # moles = 2.12 mol C3H8
1 mol C3H8 = 6.02 X 1023 molecules C3H8
1 molecule = 11 atoms (3C + 8H)
2.12 mole C3H8
1 mole C3H8
6.02 X 1023
molecules C3H811 atoms
1 molecule C3H8
= 1.40 X 1025 atoms
Try these:
1. How many atoms are in 1 mole of sucrose, C12H22O11?
2. How many atoms of C are in 2 moles of C12H22O11?
3. How many molecules are in 5 moles of C12H22O11?
How big is a mole?
What is the mass in kg of 6.02 X 1023 moles? (one mole weighs about 150 grams)
9.03 X 1022 kg !!
That’s equal to:
•more than 1% of the earth’s mass!
•more than 1.3 times the moon’s mass!
•more than 60 times the combined mass of earth’s oceans!
What is the length of 6.02 X 1023 moles in km? (a mole is about 15 cm) 9.03 X 1019
km !!That’s equal to:
the distance from earth to Alpha Centauri and back!! Wow!
How did Avogadro get through the desert? He rode a camole!
Molar MassThe molar mass of a substance is the mass (in grams) of one mole of the substance.
1 mol C = 12.01 grams
1 mol He = 4.003 grams
1 mol Ag = 107.9 grams
1 mol Ca = ?? grams
1 mol CH4 = 16.04 grams
1 mol H2O = 18.01 grams
1 mol NaCl = 58.44 grams
1 mol SO3 = ?? grams
How much does Avogadro exaggerate?He makes mountains out of molehills!Let’s Practice!
How many grams are in 9.45 mol of dinitrogen trioxide?
Known: # mol = 9.45
1 mol N2O3 = 76.0 g9.45 mol N2O3
1 mol N2O3
76.0 grams= 718.2 grams N2O3