JeopardyMolar Mass

Avogadro’s Number

StoichiometryLimiting Reactant

Emp/Molec Formula

Q $100

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Q $100 Q $100Q $100 Q $100

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Q $300 Q $300 Q $300 Q $300

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Q $500 Q $500 Q $500 Q $500

Final Jeopardy

$100 Question from H1

Determine the molar mass of sodium chloride.

$100 Answer from H1

58.44 g/mol

$200 Question from H1

Determine the molar mass of sulfuric acid.

$200 Answer from H1

98.08 g/mol

$300 Question from H1

Determine the molar mass of barium nitrate.

$300 Answer from H1

261.35 g/mol

$400 Question from H1

Determine the molar mass of ammonium sulfate.

$400 Answer from H1

132.16 g/mol

$500 Question from H1

Determine the molar mass of calcium acetate.

$500 Answer from H1

158.18 g/mol

$100 Question from H2

How many moles of silver is equal to 2.57 x 1011 atoms of silver?

$100 Answer from H2

4.27 x 10-13 mol Ag

$200 Question from H2

How many moles of potassium ions equals 2.845 x 1012 potassium ions?

$200 Answer from H2

4.73 x 10-12 mol K

$300 Question from H2

How many molecules of dihydrogen monoxide is equal to 0.0524 moles of dihydrogen monoxide?

$300 Answer from H2

3.15 x 1022 molecules H2O

$400 Question from H2

How many moles of sulfuric acid do you have if you there are 1.64 x 1012 molecules of sulfuric acid?

$400 Answer from H2

2.72 x 10-12 mol H2SO4

$500 Question from H2

If there are 8.24 x 1022 molecules of sodium chloride in a salt shaker, what is the mass of the salt?

$500 Answer from H2

8.00 g NaCl

$100 Question from H3

Calculate the mass of 0.467 moles of calcium bromide.

$100 Answer from H3

93.3 g calcium bromide

$200 Question from H3

Calculate the moles of 35.7 milligrams of strontium nitrate.

$200 Answer from H3

1.69 x 10-4 mol strontium nitrate

$300 Question from H3

Potassium and chlorine react to produce potassium chloride. Write the balanced reaction and determine how many grams of KCl is produced from 2.50 g of K and excess Cl2.

$300 Answer from H3

2 K + Cl2 ---> 2 KCl

4.77 g KCl

$400 Question from H3

Sodium oxide and dihydrogen monoxide react together to produce sodium hydroxide. Write the balanced reaction and determine how many grams of Na2O are required to produce 1.60 x 102 grams of NaOH.

$400 Answer from H3

Na2O + H2O ---> 2 NaOH

124 g Na2O

$500 Question from H3

Potassium chlorate decomposes into potassium chloride and oxygen. Write the balanced reaction and determine how many moles of O2 can be produced from 12.00 moles of KClO3.

$500 Answer from H3

2 KClO3 ---> 2 KCl + 3 O2

18.00 mol O2

$100 Question from H4

If you start with 14.8 g of C3H8 and 3.44 g of O2, determine the limiting reagent.

C3H8    + 5 O2    ------->  3 CO2      +    4 H2O

$100 Answer from H4

Limiting Reactant = O2

$200 Question from H4

If 10.0 g of Al2(SO3)3 is reacted with 10.0 g of NaOH, determine the number of moles of Al(OH)3 produced.

Al2(SO3)3   +  6 NaOH  ------> 3 Na2SO3    +  2 Al(OH)3

$200 Answer from H4

0.068 mol Al(OH)3

$300 Question from H4

If 25.4 g of Al2O3 is reacted with 10.2 g of Fe, determine the number of grams of Fe3O4 produced

4 Al2O3    +  9 Fe  ------> 3 Fe3O4    +   8 Al

$300 Answer from H4

14.12 g Fe3O4

$400 Question from H4

Which element is in excess when 3.00 grams of Mg is ignited in 2.20 grams of pure oxygen?

2Mg + O2 ----> 2MgO

$400 Answer from H4

Excess Reactant: O2

$500 Question from H4

What mass of ZnO is formed when 20.0 grams of MoO3 is reacted with 10.0 grams of Zn?

3 Zn(s) + 2 MoO3(s) ----------> Mo2O3(s) + 3 ZnO(s)

$500 Answer from H4

12.4 g of ZnO will be produced

$100 Question from H5

A compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole. Write the molecular formula.

$100 Answer from H5

C4O2H8

$200 Question from H5

When 5.00 g of FeCl3 · xH2O are heated, 2.00 g of H2O are driven off. Find the chemical formula and the name of the hydrate.

$200 Answer from H5

chemical formula: FeCl3 · 6H2Oname: iron (III) chloride hexahydrate

$300 Question from H5

Calculate the mass percent composition of carbon, nitrogen and oxygen in acetamide, C2H5NO.

$300 Answer from H5

C: 40.67%H: 8.53%N: 23.71%O: 27.09%

$400 Question from H5

The percentage composition of acetic acid is found to be 39.9% C, 6.7% H, and 53.4% O. Determine the empirical formula of acetic acid.

$400 Answer from H5

CH2O

$500 Question from H5

A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine?

C = 34.95 % H= 6.844 % O = 46.56 % N= 13.59 %

$500 Answer from H5

empirical formula: C3H7NO3

molecular formula: C3H7NO3

Final Jeopardy

 This scientist developed a number that:•Indicates the number of atoms in 12 grams of carbon-12•Is 6.02 x 1023 particles in 1 mole (Spelling MUST be correct!)

Final Jeopardy Answer

Avogadro