Jeopardy: The Mole

Percent Composition

100

What is the percent composition of Br in NaBr

77.7%

200

The % composition of Na in NaBr

What is 22.3%

300

Write the formula for percent composition

Mass of the Element / Mass of the Compound x 100%

400

Is the percent composition of O larger in CO2 or NO2

What is CO2

500

The percent composition of the "P" in phosphoric acid(H₃PO₄)?

What is 31.61%P, 3.08%H, 65.31%O

Empirical Level 1

100

What is the empirical formula of P₄O_6. ?

P₂O₃

200

What is the empirical formula of C₆H₉?

C₂H₃

300

What is the empirical formula of Hg₂F₂?

HgF

400

What is the empirical formula of C₁₀H₂₂?

C₅H₁₁

500

What is the empirical formula of CH₂OHCH₂OH?

CH₃O

Empirical Level 2

100

Write the molecular formulas of the following compounds:

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

C₄O₂H₈

200

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C₄H₄O and a molar mass of 136 grams per mole.

C₈H₈O₂

300

The empirical formula for a molecule containing 38.47% Carbon, 12.61% Hydrogen and 48.92% Oxygen.

What is CH₄O

400

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C₂H₈N and a molar mass of 46 grams per mole.

C₂H₈N

500

Write the molecular formulas of the following compounds:

A compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole.

C₂F₂Br₂O₂

Empirical Level 3

100

A compound composed of: 72% iron and 27.6% oxygen by mass.

Fe₃O₄

200

A compound composed of: 9.93% carbon, 58.6% chlorine, and 31.4% fluorine.

CCl₂F₂

300

A compound composed of: .556g carbon and .0933g hydrogen.

CH₂

400

A compound with a molecular mass of 70g/mol and an empirical formula of CH₂.

C₅H₁₀

500

A compound with a molecular mass of 46.0g/mol and an empirical formula of NO₂

NO₂

Mole Conversions

100

How many moles are in 100.0 grams of sodium?  

[Record all molar masses to the tenths place.]

4.35 moles of sodium

200

How many grams are in 12.0 moles of carbon dioxide (CO₂)?

[Record all molar masses to the tenths place.]

528 grams of CO₂

300

How many moles of a substance are present if there are 5.97x10²² atoms?

0.099 moles 

400

How many molecules of water are in a sample with a mass of 62.5 grams?

[Record all masses to the tenths place]

2.09 x 10²⁴ molecules of H₂O

500

The amount of atoms are in a sample of 100.5 grams of Calcium (Ca)

1.51x10²⁴ atoms