POWERPOINT JEOPARDY

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MOLES AND STIOCHOIMETRY VERSION By Connell
Rae, Lukas Ihringer, AJ Weisgerber
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MOLES AND STOICHIOMETRY JEOPARDY
Molecular and Empirical Formulas
Stoichiometry
Balancing Equations
Percent Composition
Mole Conversions
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400
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500
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500
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How many moles are in 28 grams of CO2?
Mole Conversion for 100 points

• 28.0gCO2 x 1 mol CO2 0.636 mol CO2
  44.01gCO2

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Mole Conversion for 200 pointsHow many moles
of magnesium is 3.01 x 1022 atoms of magnesium?

• 3.01e22 atom Mg x 1 mole Mg 0.0499 mol Mg
  6.022e23 atoms Mg

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Mole Conversion for 300 pointsDetermine the
volume, in liters, occupied by 0.030 moles of a
gas at STP.

• 0.030 mol x 22.4 L 0.67 L 1 mole

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Mole Conversion for 400 pointsHow many oxygen
molecules are in 3.36 L of oxygen gas at STP?

• 3.36 L O2 x 1 mole O2 x 6.022e23 molecules
  9.03e22 22.4 L O2 1 mole O2

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Mole Conversion for 500 pointFind the mass in
grams of 2.00 x 1023 molecules of F2.

• 2.00e23 mc F2 x 1 mole F2 x 38g F2 12.6g
  F2 6.022e23 mc F2 1 mole

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Percent Composition for 100 pointsFind the
percent composition of CuBr2

• Cu 63.55 63.55(1) x 100
  28.45 223.35
• Br x2 159.8 79.9(2) x 100
  71.55 223.35
• 223.35

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Percent Composition for 200 pointsFind the
percent composition of NaOH

• Na 22.99 (1)22.99 x 100
  57.48 40.00
• O 16.00 (1)16.00 x 100 40.00
  40.00
• H 1.01 (1)1.01 x 100 2.53
  40.00
• 40.00

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Percent Composition for 300 pointsFind the
percent composition of N2S2

• N x2 28.02 14.01(2) x 100
  30.44 92.04
• S x2 64.02 32.01(2) x 100 69.56
  92.04
• 92.04

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Percent Composition for 400 pointsFind the
percent composition of KMnO4

• K 39.10 (1)39.10
  x 100 24.74 158.04
• Mn 54.94 (1)54.94 x 100 34.76
  158.04
• O x4 64.00 (4)16.00 x 100 40.50
  158.04
• 158.04

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Percent Composition for 500 pointsFind the
percent composition of Al2(SO4)3

• Al x2 53.96 (2)26.98 x
  100 15.78 341.99
• S x3 96.03 (3)32.01 x 100 28.08
  341.99
• O x12 192 (12)16.00 x 100 56.14
  341.99
• 341.99

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Empirical and Molecular Formulas for 100
pointsFind the empirical formula for a compound
containing .783 Carbon, .196 Hydrogen, and
.521 Oxygen.

• .783g C x 1 mol C 0.0652 2 12.01g C
  0.0326
• .196g H x 1 mol H .194 6 C2H6O
  1.01g H 0.0326
• .521g O x 1 mol O 0.0326 1 16.00g
  O 0.0326

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Empirical and Molecular Formulas for 200
pointsThe empirical formula for a substance is
CH2O. If its molar mass is 180, what is the
molecular formula

• C 12.01 H x2 2.02 180
  6 6(CH2O) C6H12O6 O
  16.00 30.03 30.03

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Empirical and Molecular Formulas for 300
pointsThe empirical formula for a substance is
C3H7NO3. If its molar mass is 105.11, what is the
molecular formula

• C x3 36.03 H x7 7.07
  N x1 14.01 105.11 1
  1(C3H7NO3) C3H7NO3 O x3
  48.00 105.11 105.11

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Empirical and Molecular Formulas for 400
pointsFind the empirical formula for a compound
containing 1.388g Carbon, .345g Hydrogen, and
1.850g Oxygen.

• 1.388g C x 1 mol C 0.1156 1
  12.01g C 0.1156
• .345g H x 1 mol H 0.3416 3 CH3O
  1.01g H 0.1156
• 1.850g O x 1 mol O 0.1156 1 16.00g
  O 0.1156

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Empirical and Molecular Formulas for 500
pointsFind the empirical and molecular formula
for a compound containing 11.39g Phosphorus and
39.12g Chloride. Its molar mass is 274.64g.

• 11.36g P x 1 mol P 0.3677 1
  30.97g P 0.3677 39.12g Cl x 1 mol
  Cl 1.1035 3 PCl3 35.45g Cl
  0.3677
• P x1 30.97 274.64 2 2(PCl3) P2Cl6
  Cl x3 106.35
  137.32 137.32

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Balancing Equation for 100 pointsBalance _N2
_H2 ? _NH3

• Balanced 1N2 3H2 ? 2NH3

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Balancing Equation for 200 pointsBalance
_KClO3 ? _KCL _O2

• Balanced 2KClO3 ? 2KCL 3O2

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Balancing Equation for 300 pointsBalance _Na
_H2O ? _NaOH _H2

• Balanced 2Na 2H2O ? 2NaOH 1H2

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Balancing Equation for 400 pointsBalance
_FeCl3 _NaOH ? _Fe(OH)3 _NaCl

• Balanced 1FeCl3 3NaOH ? 1Fe(OH)3 3NaCl

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Balancing Equation for 500 pointsBalance
_C8H18 _O2 ? _CO2 _H2O

• Balanced 2C8H18 25O2 ? 16CO2 18H2O

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Stoichiometry for 100 pointsGiven this
equation2 KClO3 ---gt 2 KCl 3 O2, How many
moles of O2 can be produced by letting 12.00
moles of KClO3 react?

• 12 mol KClO3 x 3 mol O2 18 mol O2 2
  mol KClO3

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Stoichiometry for 200 pointsGiven this
equation 2K Cl2 ---gt 2KCl, how many moles of
KCl would be produced from 2.50g of K and an
excess of Cl2

• 2.50g K x 1 mol K x 2 mol KCl 0.0639 mol KCL
  39.10g K 2 mol K

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Stoichiometry for 300 pointsGiven this
equation 2NaClO3 ? 2NaCl 3O2, how many grams
of O2 would be produced from 12.0 moles of NaClO3

• 12 mol NaClO3 x 3 mol O2 x 32.0g O2 576g
  O2 2 mol NaClO3 1
  mol O2

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Stoichiometry for 400 pointsGiven this
equation Na2O H2O ---gt 2NaOH, How many grams
of NaOH can be produced from 54.8 grams of Na2O
and an excess of H2O reacting

• 54.8g Na2O x 1 mol Na2O x 2 mol NaOH x 40 g NaOH
  35.4 61.98g Na2O 2 mol KClO3
  1 mol NaOH

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Stoichiometry for 500 pointsGiven this
equation 8Fe S8 ---gt 8FeS, How many grams of
FeS can be produced from 24.5 grams of S and an
excess of Fe reacting

• 24.5g S8 x 1 mol S8 x 8 mol FeS x 87.86 g FeS
  67.2 256.08g S 1 mol S8 1 mol FeS