Stoichiometry a quantitative study of chemical reactions

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Stoichiometry a quantitative study of chemical
reactions

• Ex How many grams of potassium phosphate will
  react with 100g of magnesium nitrate? How much
  precipitate will form?

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• First 3 things to learn p.81
• Molar mass mole avogadros number
• Formula mass
• Molecular mass
• Atomic mass
• Formula weight
• Molecular weight
• Atomic weight
• Atomic mass units
• Molar mass is the mass in grams of one mole of
  the compound
• Ex) carbon monoxide molar mass 28.01 grams
• CO.carbon12.01amu oxygen 16.00 amu
  ..28.01 grams
• sodium chloride molar mass 58.45 grams
• NaCl..sodium 22.99 amu chlorine
  35.45amu.58.44 grams

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Ws 9.0
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• Mole or mol
• Mole dozen cars
• eggs
• volcanos
• Mole the amount of substance that contains the
  same number of particles as 12.01 grams of carbon
  12.
• A chemist may want 1mol of Carbon 12.01grams
• 1mol of Iron 55.85grams
• 1mol of Calcium 40.08grams
• 1mol of H20 18.016 grams
• 1mol of FeSO4151.92 grams

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• units are just as important as numbers
• units tell you to multiply or divide
• 1. How many moles are in 11 grams of Sodium?
• 2. How many grams in 2.7mol of Phosphorus?
• 3. How many moles are in 23grams of Krypton?
• 4. How many grams are in 86.93mol of Calcium?

Ws.9.1
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1. How many moles are in 5.6 grams of Magnesium?
2. How many grams are in 242 moles of arsenic?
3. How many moles are in 2.7grams of Sodium
   Hydroxide?
4. How many moles are 52.5 grams of Copper II
   Sulfate?

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1. How many grams are in 75 moles of water?
2. How many moles are in 1.7 x 105 grams of methane?
3. How many grams are in 4.3 x 10-6 moles of Calcium
   phosphate?
4. How many grams are in 18.37 x 10-2 moles of
   silicon dioxide?

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1. How many moles in 2.3 x 103 grams of potassium
   sulfide
2. How many grams in 15 moles of hydrochloric acid?
3. How many grams in 132 x 105 moles of Manganese?
4. How many grams in 232 x 103 moles of aluminum
   hydroxide?

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en

• 1x 102 hundred
• 1x 103 thousand
• 1x 106 1 million
• 1x 109 1 billion
• 1x 1012 1 trillion
• l million spend 1,000.00/day
• starting today ,
• 1 billion spend 1000.00/day
• start day, 600BC---
• 1 trillion spend 1000.00/second1.444
  million per day
• need ___________ years to spend it

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• Avagadros number 6.022 x 1023
• One mole of anything has avagadros number in it.
  
• atoms in it
• Avagadros 6.022 x 1023
• molecules in it
• One mole of mms will cover the United States.
  How deep?
• 1 mol of Cu has 6.022 x 1023 atoms
• 1 mol of Ag has 6.022 x 1023 atoms
• 1 mol of H20 has 6.022 x 1023 molecules
• 1 mol of CuSO4 has 6.022 x 1023 molecules
• word units are as important as the numbers
• word units tell if multiplying or dividing
• because every experiment is different...there
  is no set pattern or formula
• the word unit to eliminate goes opposite

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• ws.9.03
• How many molecules in 28grams of Sodium Sulfate?
• How many moles in 28grams of Sodium Sulfate?
• How many grams in 7.5 x 1028 molecules of
  SilverNitrate
• 4. How many moles in 7.5 x 1028 molecules of
  SilverNitrate?

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1. How many moles in 120x1042 molecules of Sodium
   Chloride?
2. How many molecules in 25g of Sodium Chloride?
3. How many molecules in 122g of Copper II Nitrate?
4. How many grams in 9.4 x 1025 molecules of
   hydrogen gas?

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1. How many molecules in 230 moles of Cobalt II
   Chloride?
2. How many moles are in 9.4 x 1025 molecules of
   Sulfuric Acid?
3. How many grams are in 9.4 x 1025 molecules of
   Sulfuric Acid?
4. How many molecules are in 255 grams of Ammonium
   Hydroxide?

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1. How many molecules of Aspirin are in one pill?
   One pill is .2g. Aspirin(C9H8O4)
2. How many moles of Aspirin in 2 pills?
3. How many molecules of Cocaine would a drug addict
   pump in his blood stream if the person used one
   gram? Cocaine ( C17H21NO4)

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• AP-problem p.93
• Isopentyl acetate is the compound responsible for
  the scent of bananas. Interestingly bees release
  about 1ug(1 X 10-6g) of this compound when they
  sting. The resulting scent attracts other bees
  to join the attack.
• How many molecules of isopentyl acetate( C7H14O2)
  are released in a typical bee sting?
• How many atoms of Carbon are present?

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• Note
• 1 mole of CH4 contains
• 1mole of carbon and 4moles of hydrogen