Chemistry Final Exam Review (Units 1-5)

Unit 1

100

Write 49,045,000,000 in scientific notation.

4.9045x10¹⁰

200

Convert 5 Km to mm

5,000,000

300

What is the density of a 54.0 gram object that has a length of 5.0 cm, width of 6.0 cm, and height of 7.0 cm?

0.26 g/mL

400

The sum of 44.56 + 2.0 + 0.00058 + 3000 = 

(Report your answer to the correct number of sig figs)

3047

500

If you go to school for 180 days each school year and each school day is 7 hours long, how many hours are spent in school in one school year?    Bonus points: If you are 17, currently finishing up your junior year and have been in school since kindergarten, what percentage of your life (in hours) have you spent in school (assume same length of school day and school year as above)?

1,260 hours

~10%

Unit 2

100

How many neutrons are in Cu-65?

36

200

How many electrons would iron have if it has a charge of +3?

23

300

What type of nuclear decay is responsible for the energy of the sun and other stars?

fusion

400

If Radon - 226 undergoes alpha decay, what element does it become? What about beta decay?

alpha - Polonium

beta - Francium

500

A 200 g sample of Iodine - 135 has been decaying for 33 hours. Now only 6.25 g remain. What is it's half-life?

6.6 hours

Unit 3

100

Is CO₂ polar or nonpolar? Does it contain polar bonds?

Nonpolar, yes

200

What shape would SH₂ form?

bent

300

What is the noble gas notation for Bismuth?

[Xe]6s²4f¹⁴5d¹⁰6p³

400

Which of the following elements has the least ionization energy? Mg, K, Ca, Rb

Rb

500

For Beryllium, what is its valence electron #, oxidation number, period #, group #, classification (m, nm, ml), family name, and orbital notation?

2, +2, 2, 2, m, alkaline earth metals, 1s[^v] 2s [^v]

Unit 4

100

What is the name of this compound? N₂O₅

dinitrogen pentoxide

200

What is the formula for this compound? gold (III) phosphate

AuPO₄

300

What is the name of this compound? Cu₂SO₃

Copper (I) sulfite

400

What is the formula for this compound? ammonium carbonate

(NH₄)₂CO₃

500

What is the name of this compound? HClO₄

perchloric acid

Unit 5

100

What is the term for an insoluble solid produced by a chemical change?

precipitate

200

5.0 g of magnesium reacted with oxygen gas to produce 8.3 g of magnesium oxide. How many grams of oxygen reacted with the magnesium?

3.3 g O₂

300

What type of reaction occurs when methane burns in the presence of oxygen?

combustion

400

Ag + CuCl₂ -->  Is this reaction possible? Why or why not?

No, silver is below copper on the activity series

500

Write the full balanced equation for the reaction that occurs when magnesium sulfate reacts with copper I phosphate.

3MgSO₄ + 2Cu₃(PO₄) --> Mg₃(PO₄)₂ + 3Cu₂(SO₄)