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Warmup (5 minutes)

Warmup (5 minutes). 1.0 x10 -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 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 x10-14 • (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 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. Multistep Conversions

  4. 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 )

  5. 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

  6. 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

  7. 3. 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

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

  9. 4. Are there more nitrate ions in 4.00 x 1014 molecules Al(NO3)3OR 2.00 x 1014 molecules of KNO3? ( NO3-ions) 3 4.00 x 1014 molecules Al(NO3)3 molecule Al(NO3)3 1 = 1.20 x 1015 NO3-ions ( NO3-ion) 1 2.00 x 1014 molecules of KNO3 1 molecule KNO3 = 2.00 x 1014 NO3-ions

  10. The Molar Highway Finding Various Quantities using The Mole # atoms or ions in sample moles of element or ion in the compound Need: # of that atom or ion in compound Need: # of that atom or ion in compound # molecules compound in sample Mass compound in sample 1 mole of a compound Need: molar mass of compound Need: 1 mole = 6.02 x 1023 particles

  11. 5. A sample of 16.2 grams of MgBr2and a sample of 21.0 grams of AgBr are arguing over who contains more moles of the element bromine. Who is correct? ( mole Br) ( mole MgBr2) 1 2 16.2 g MgBr2 ( mole MgBr2) 1 184.11 ( g MgBr2) = 0.176 mole Br ( mole AgBr ) 1 ( mole Br) 1 21.0 g AgBr ( g AgBr) ( mole AgBr) 1 187.77 = 0.112 mole Br

  12. 6. A sample of 3.9 x 1019 strontium chloride molecules contains how many milligrams of chlorine? 3.9 x 1019molec. SrCl2 (2atoms Cl ) (1mole Cl) ( 35.45g Cl) ( 103mg Cl) (1molecSrCl2) (6.02 x 1023atoms Cl) (1mole Cl)( 1g Cl) 4.6 mg chlorine

  13. 7. The chemical tryptoline is a serotonin reuptake inhibitor. 76.71%C 7.02%H, 16.27%N. a. Determine the empirical formula, which is also the molecular formula. Answer (work shown on board): C11H12N2 b. How many atoms of hydrogen would be found in 4.5 x 10-6g of tryptoline? (done on board) answer: 1.9 x 1017 atoms H

  14. Moles of Water Activity

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