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Warmup (5 minutes)

Warmup (5 minutes). 1.0 10 -14. (1.0 x 10 9 )/(1.0 x 10 23 ) = 2) How many moles are in 40.96 grams of nitrate ions?. ( mole NO 3 - ). 1. 40.96 g NO 3 -. ( g NO 3 - ). 62.01. Take out your PT, lecture notes, calculator, and Molar Highway. = 0.6605 mole NO 3 -.

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Warmup (5 minutes)

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  1. Warmup (5 minutes) 1.0 10-14 • (1.0 x 109)/(1.0 x 1023) = 2) How many moles are in 40.96 grams of nitrate ions? ( mole NO3-) 1 40.96 g NO3- ( g NO3-) 62.01 Take out your PT, lecture notes, calculator, and Molar Highway = 0.6605 mole NO3-

  2. a tiny molelike creature with wings which drinks the blood of anyone who doesn't remember when Mole Day is the continual reverence of moles a word describing the Mole Day songs which are played over the loudspeaker moleskito moleism moleodic What do you get when you have a bunch of moles acting like idiots? What kept Avogadro in bed for two months? A bunch of Moleasses Moleonucleosis

  3. Mole Day Song“Let It Be” = “Twenty-Three” When I find myself in times of troubleAvogodro's number comes to meSix point oh two two, e twenty three. The mole is a counting numberAnd you'll find few who disagreeSix point oh two two, e twenty three. Twenty three, twenty threeTwenty three, ya twenty three.A mole is six point oh e twenty three The molar mass of an atom is on The periodic table you will readThe number of atoms is six point oh e twenty three To convert from grams to atomsIt's the molar mass that you will needTimes by six point oh two e twenty three Twenty three twenty threeTwenty three, ya twenty threeA mole is six point oh e twenty three

  4. Conversions • Using Avogadros Number • Multi-Step

  5. Ex 1. How many molecules of CO2are there in 1.50 moles of CO2 ? 1.50 mole CO2 = 9.03x 1023molecules of CO2 (molecules CO2 ) 6.02 x 1023 1 (mole CO2 )

  6. EX 2: How many moles of Na are there in 4.50 x 105 atoms of Na? 1 mole Na 4.50 x105 atoms Na ( ) ( ) = 7.48x10-19 moles Na 6.02 x 1023 atoms Na

  7. EX 3:How many chloride ions are in 2.3 moles of Cl-? 2.3 moles Cl- (6.02 x 1023 ions Cl- ) (1 moles Cl- ) = 1.4 x1024 chloride ions

  8. The Molar Highway Finding Various Quantities using The Mole Mass compound in sample # molecules compound in sample 1 mole of a compound Need: molar mass of compound Need: 1 mole = 6.02 x 1023 particles

  9. 4. Two scientists engage in a weight-lifting competition to see who is stronger (HOT!!!) Avagadro can bench press 7.85 x 1025 atoms carbon Einstein can bench press 6.78 x 1024 atoms einsteinium. Who can bench press the greatest mass? ( g C) ( mole C) 1 12.01 7.85 x 1025 atoms C ( atoms C) ( mole C) 1 6.02 x 1023 = 1570 or 1.57 x 103 g C ( mole Es) 1 ( g Es) 252 6.78 x 1024 atoms Es ( atoms Es) 6.02 x 1023 ( mole Es) 1 = 2840 or 2.84 x 103 g Es

  10. 5. Which is heavier:4.00 x 1014 molecules Al(NO3)3OR 2.00 x 1014 molecules of KNO3? ( mole Al(NO3)3) 4.00 x 1014 molec Al(NO3)3 1 ( g Al(NO3)3) 213.01 1 ( molec. Al(NO3)3 6.02 x 1023 ( mole Al(NO3)3) = 1.42 x 10-7g Al(NO3)3 ( mole KNO3) 2.00 x 1014 molec.KNO3 1 ( g KNO3) 101.11 ( molec. KNO3 6.02 x 1023 ( mole KNO3) 1 = 3.36 x 10-8g KNO3

  11. 6. A sample of 16.2 grams of MgBr2and a sample of 21.0 grams of AgBr are arguing over who contains more molecules! Who is correct? ( molec MgBr2) ( mole MgBr2) 1 6.02 x 1023 16.2 g MgBr2 ( mole MgBr2) 1 184.11 ( g MgBr2) = 5.30 x1022molec. MgBr2 ( mole AgBr ) 1 ( molec AgBr) 6.02 x 1023 21.0 g AgBr ( g AgBr) ( mole AgBr) 1 187.77 = 6.73 x 1022 molec AgBr

  12. Food For Thought!

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