Final Review Jeopardy

Unit Conversions

100

Convert 450 g to micrograms

450,000,000 micrograms

200

Convert 109.85 mg to kilograms

0.00010985 kg

300

Determine the number of mg of Al in 2.5E24 atoms of Al.

112,005.98 mg

110,000 mg with sig figs

400

Find the number of grams of Oxygen contained in 50.0 grams of CO₂

36.4 g of O

500

How many atoms of Iron are found in a cube of iron with a volume of 10.0 mL (Density of iron = 7.87 g/mL)

8.49E23 atoms of Iron

Misc

100

An isotope of Oxygen has 9 neutrons. Write the symbol for this in A/Z notation

¹⁷₈O

200

Identify the acid and the base:

HNO₃ + H₂O --> NO₃^- + H₃O⁺

Acid : HNO₃

Base: H₂O

300

Which has a smaller atomic radius, Ca²⁺ or K⁺

Ca²⁺

400

Identify the spectator ions and precipitate.

2NaOH (aq) + CaCl₂ (aq) --> Ca(OH)₂ (s) + 2NaCl (aq)

Precipitate: Ca(OH)₂

Spectators: 2Na⁺ and 2Cl^-

500

What are the 7 diatomic elements

(remember the acronym)

HOFBrINCl

Lewis Structures and polarity

100

Draw the Lewis structure for CCl₄

State whether it is polar or nonpolar

I'll draw it :)

It is nonpolar

200

Draw the Lewis structure for NH₃

State the electron domain AND molecular geometry.

I'll draw it :)

Electron: Tetrahedral

Molecular: Trigonal pyramidal

300

Draw the Lewis structure water (H₂O) including the bond dipole arrows and partial charges. 

I draw :)

400

Rank the following bonds from least to greatest polarity: HCl, HI, HF, HBr

HI < HBr < HCl < HF

500

Draw the Lewis structure for HCO₃^-

I draw :)

Stoichiometry, titrations, calorimetry

100

Consider:

CH₄ + 2O₂ --> CO₂ + 2H₂O

How much O₂ (in moles) is needed to fully combust 15.0 g of CH₄ (MW of CH₄ = 16.04 g/mol)

1.87 moles of O₂

200

Consider:

CH₄ + 2O₂ --> CO₂ + 2H₂O

How many grams of H₂O are produced when 15.00 g of CH₄ fully combust? (MW of CH₄ = 16.04 g/mol; MW of water = 18.015 g/mol)

33.69 grams of water

300

Consider:

AuCl₃ (aq) + Al (s) --> Au (s) + AlCl₃ (aq)

How many grams of solid gold are produced when 150.0 grams of solid Al react?

1095 grams of gold

Limiting reagent, theoretical yield

100

Consider:

CH₄ + 2O₂ --> CO₂ + 2H₂O

If 1.5 moles of CH₄ reacts with 2 moles of O₂, what is the limiting reactant?

Oxygen.

200

Consider:

CH₄ + 2O₂ --> CO₂ + 2H₂O

If 1.5 moles of CH₄ react with 2 moles of O₂, what is the theoretical yield of CO₂ in moles?

1.5 moles of CO₂

300

If the theoretical yield of a reaction is 25 grams, but only 14 grams is recovered, what was the percent yield?

56%

400

Consider:

HCl + HCO₃^- --> CO₂ + H₂O + Cl^-

If 15.0 grams of HCl react with 25.0 grams of HCO₃^-, what is the theoretical yield of CO₂ (moles)?

(MW HCl = 16.46, MW HCO₃^- = 61.0168)

Theoretical yield = 0.410 moles of CO₂