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JEOPARDY!
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• Chemistry Final Review

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JEOPARDY!
Avogadros Number
Mole Conversions
Empirical Formulas
Stoichiometry 1
Stoichiometry 2
Misc.
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Daily Double Graphic and Sound Effect!
Daily Double!!!

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What is Avogadros Number?
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6.022 x 1023
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What does Avogadros Number represent?
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It represents the number of molecules per mole of
substance.
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How many molecules are in 3.6 moles of Silver
(Ag)?
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2.2 x 1023 molecules Ag
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How many moles are in 1.240 x 1040 molecules
of Barium (Ba)?
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2.059 x 1016 moles of Ba
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How many hydrogen molecules are present in 2.356
x 1019 moles of H2O?
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2.838 x 1043 molecules of H
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How many moles are present in 1.254 x 1045
molecules of Nitrogen?
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2.082 x 1021 moles of N
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How do you go about converting moles to grams or
grams to moles?
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Use the molar mass
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Calculate the number of H atoms in .350 mol of
C6H12O6?
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2.53 x 1024 H atoms
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Arrange the following samples in order of
increasing of C atoms (a) 12 grams C, (b) 1
mol C2H2, (c) 9 x 1023 molecules of CO2
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(a), (c), (b)
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How many molecules of O are in 12.24 g of H2O?
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4.095 x 1023 molecules of O
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What is an empirical formula?
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It is a chemical formula that tells us the ratio
of atoms within the compound with the smallest
integers.
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What is the step-by-step process that leads to
the empirical formula from grams of each element?
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Grams of each element ? Use molar mass to convert
? Moles of each element ? Calculate mole ratio ?
empirical formula
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Ascorbic acid contains 40.92 C, 4.58 H, and
54.50 O by mass. Find the empirical formula.
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C3H4O3
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What is the molecular formula of mesitylene if
its molecular weight is 120 amu and its empirical
formula is C3H4?
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C9H12
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Combusting .255 g of isopropyl alcohol produces
.561 g of CO2 and .306 g of water. Determine the
empirical formula of isopropyl alcohol.
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C3H8O
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How many grams are in .239 moles of water?
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4.30 grams of water
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How many liters are in 2.09 moles of water? (1g
water 1 cm3)
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.0376 L
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How many molecules of C are in 7.05 L of CO2?
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1.90 x 1023 molecules of C
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How many moles of H2O are formed when 6.79 grams
of C2H4O2 are combusted in open air?
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.226 moles of water
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How many grams of H are produced when 9.2 grams
of C2H4O2 are combusted in air?
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.61 grams of H
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What ratio is used to convert b/w amounts of
reactants products in a reaction?
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Mole ratio
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How many moles of O2 are used to make 2.3 moles
of CO2?
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2.3 moles of O2
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How many grams of NaOH form when 4.2 moles of
Na2O and 4.2 moles of water combine?
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340 grams of NaOH
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How many moles of sulfuric acid form when .356
grams of SO3 and 1.98 grams of water combine?
What is the limiting reactant?
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.00444 moles of acid, SO3
Daily Double!!!
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How many liters of .36 M HCl does it take to
react with excess Magnesium hydroxide to form
4.55 grams of Magnesium chloride?
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.27 L HCl
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What are the units used to convert moles to grams
or grams to moles?
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Molar Mass- Grams per mole (g/mol)
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What is the difference between a molecular
empirical formula?
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An empirical formula reflects the smallest ratio
of atoms, while the molecular formula does not.
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How many molecules of Cl are in 9.67 x 104 grams
of Magnesium chloride?
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1.22 x 1027 molecules of Cl
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How many grams of N are present in 35 mL of .40 M
NH4OH solution?
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.20 grams of N
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If the empirical formula of a compound is C4H8O
and the mass of the compound is 216 grams, what
is the molecular formula?
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C12H24O3
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Final JeopardyWhat is the molecular formula of a
compound with empirical formula CH4 and mass 144g?
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C9H36
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