Mole PowerPoint - Avogadro's Number, Molar Mass Calculations
Dozen Couple Few Bakers Ten Dozen Mole- unit standing for 6.02 x 1023 particles
602,000,000,000,000,000,000,000 Avogadros particles Number Atoms A and Molecules are TINY!
drop of water contains 10 trillion water molecules! 6.02 x 1023 makes a chemists life a lot easier Its impossible to keep track of one atom
so scientist discovered this number that gives us the molar mass of an atom Molar mass is the mass of 6.02 x 1023 particles of a given substance Mass is given in grams Luckily 6.02 x 1023 particles, or a mole, adds up to the same number as the avg. atomic mass-but in grams So a mole of magnesium has a mass of 24.305
grams! We dont always have exactly 1 mole, though. When we have different amounts of moles, we can convert between atoms and moles Multiply by Avogadros Number
Moles Particles Divide by Avogadros Number A lab experiment calls for 2.00 moles of Calcium. How many particles of Calcium are required? How can we solve this?
ID what were given and what the questions asking for and set up the T-Chart 23 2 moles Calcium 6.02 x 10 particles 1 mole Calcium You have 12.04x1023 atoms of sulfur. How many moles of sulfur do you have?
How many moles are 1.20 x 1025 atoms of phosphorous? How many moles of magnesium is 3.01 x 1022 atoms of magnesium? How
many atoms are in 0.750 moles of zinc? Converting from grams mole Mole grams Calculating molecular mass Molar mass: mass of 1 mole of in grams 1 mole C atoms = _____________________
1 mole of C atoms has a mass of_________ g. Molar mass of O = ___________ Molar mass of Li = ____________ For any element, the __________________________________ __________________________________ 3.2 What is the mass of one mole of: S C
Hg Cu Fe 3.2 Molecular mass (or molar mass) is the sum of the molar masses of all the atoms in a molecule. S O
SO2 SO2 32.06 g/mol 16.00 g/mol 64.06 g/mol SO2 consists of ________ and ______________.
1 mole SO2 = _________________ ________________molecules of SO2 has a total mass of ______________ 3.3 NO2 C6H12O6 (NH4)3PO4 If
I had 20 Wolfies, and the cost of one pair of kicks is 4 Wolfies for 1 pair, how many pairs could I have? Whats my conversion factor? What unit am I given? What unit is the question asking for? 20 Wolfie 1 pair 4 Wolfies Now...
(20/4) pairs 5 pairs If I had 20 grams of helium, and one mole of helium is 4 grams, how many moles of helium could I have? Whats my conversion factor? What unit am I given?
What unit is the question asking for? 20 grams He 1 mole He 4 grams He (20/4) moles He 5 moles He 1 mole of Zinc has
a mass of 65.39 g. Conversion factor: 1 mole Zn 65.39 g Zn OR 65.39 g Zn 1 mole Zn How many moles of Zn are in 85
grams? 10.0 g Fe 8.0 g O
1.15 g Mg 15.63 g Cl Hint: What are the conversion factors?
1 mole of Zinc has a mass of 65.39 g. Conversion factor: 2 moles Zn 65.39 g Zn 1 mole Zn 1 mole Zn 65.39 g Zn OR 65.39 g Zn
1 mole Zn 130.78 g Zn If I had 2 moles of Zn, how many grams of Zn do I have? 1.35 mol Fe
24.5 mol O 0.876 mol Ca 1.25 mol H
Hint: What are the conversion factors? 2.3 moles C3H8 44 g C3H8 2.3 x 44 g C3H8
101.2 g C3H8 1 mole C3H8 2.3 moles C3H8 6.02 x 1023 molecules C3H8 1 mole C3H8 2.3 x (6.02 x 1023 molecules C3H8) 13.2 x 1023 molecules C3H8
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