2. Reviewed journal pages 5 and 6. Went over problem 5d.
5d. Calculate the number of moles from information given.
3.98 x 10^5 (^ means that the number after is an exponent) kg of nickel
-because the periodic table of elements gives mass in grams we must convert kilo grams to grams
3.98 x 10^5 kg of Ni | 1000 g | 1 mole
_________________________________ = 6.78 x 10^6 moles of Nickel
| 1 kg | 58.69 g Ni
3. Work on Mole Stations Lab
SET 1: 1. 25 people were in the room at the time of counting
2. 25 pairs of shoes
3. 50 total shoes in the room
SET 2: 1. Mass of Al was 1g
2. Mass from periodic table 26.98 g/mole
3. After calculations you have .2 moles of Al
SET 3: 1. Mass of C rod 1g
2. Mass from periodic table 12.01 g/mole
3. 0.1 moles in C rod
4. 2 x 10^21 atom of C
SET 4: 2. 4.8 x 10^-10 mole of Kr
3. 3.75 x 10^-8 g of Kr in graduated cylinder
SET 5: 1. (amount of H20) ml in cylinder- I had 18 ml
2. 18.02g is the mass of H20
3. There are 18g of H20 in one mole
4. There is 1 mole of H20 in the cylinder
SET 6: 2. Mass of HCl 54.75 g
3. Mass of 1 mole of HCl is 1.502g
4. There are 36.46 moles of HCl in the dropper bottle
5. There are 6.061x 10^-23 molecules of HCl in the dropper bottle
SET 7: 1. Volume of Al bar 8.86 cm^3
2. Mass of bar is 16.2 g
3. There are .600 moles of Al in the bar of Al
4. There are 9.97 x 10^-25 atoms of Al in the bar
SET 8: 2. There are 10.8 g of Ne in the tube
3. There are .535 atoms of Ne in tube
SET 9: 2. Mass of balloon 2.35g
3. Mass of balloon with air 2.49g
4. Mass of air in balloon .14g
5. Mass of O exhaled .002 g
6. The mass of 1 mole of 0 is 1.29 x 10^25
4. View Moodle if not done previous night
5. Quiz on Thursday Jan. 27
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