Final Chemistry Exam Review

Sig figs, Scientific Notation, Dimensional Analysis, Density

100

Correct to 3 significant figures: express 0.007463.

0.00746

200

When you add/subtract two values, the answer should contain the least number of _________?

decimal places

300

You place 26.85g piece of gold in a 10mL graduated cylinder. The level of the water rises 3.50mL. What is the density of the gold?

7.67 g/mL

400

Answer the following in scientific notation:

3.7 x 10⁶ - 8.0 x 10⁵ = 

2.9 x 10⁶

500

A car is traveling 55 miles per hour (55mph). If the car travels for 4.5 hours how many miles were driven?

247.5 miles 

Atomic Structure

100

How many protons, neutrons and electrons does the element with the atomic number 16 and the mass number 32 have?

p = 16

n = 16

e = 16

200

What is the definition of an isotope?

Elements with the same number of protons but different numbers of neutrons.

300

How many protons, neutrons and electrons does sulfur-35 have?

p = 16

n = 19

e = 16

400

Calculate the average atomic mass for the following element that has the following isotopes:

Isotope 1: Mass = 19 amu, Abundance = 56%

Isotope 2: Mass = 20 amu, Abundance = 23%

Isotope 3: Mass = 21 amu, Abundance = 21%

19.65 amu

500

What is the electron configuration for Sodium?

1s²2s²2p⁶3s¹

Bonding

100

What type of bond is Be(NO₃)₂?

Ionic Bond

200

Name the compound: NaBr

Sodium Bromide

300

Write the formula for Copper II phosphate

Cu₃(PO₄)₂

400

What property of the sea of electrons model contributes to the properties of metallic compounds?

delocalized electrons

500

Write the formula for Dinitrogen Trioxide

N₂O₃

Lewis Structures, polarity & IMFs

100

How many total valence electrons does SiH₄ have?

8 ve^-

200

How many single bonds does Lewis structure for H₂O have?

2 single bonds

300

Is PF₃ polar or nonpolar?

polar

400

How many double bonds does the Lewis structure for SO₃ have?

3 double bonds

500

What are the intermolecular forces for NH₃?

Hydrogen Bonding

Mole conversions, chemical reactions & stoichiometry

100

How many moles of Argon are in 452g of Argon?

11.3 moles

200

How many atoms are in 0.750 moles of Zinc?

4.515 x 10²³ atoms

300

Balance the following chemical reaction:

__Na(OH) + __H₃(PO₄) -> __Na₃(PO₄) + __H₂O

3Na(OH) + H₃(PO₄) -> Na₃(PO₄) + 3H₂O

400

Write and balance the chemical reaction:

Potassium chlorate decomposes completely, producing oxygen gas (O₂). 

2KClO₃ -> 2KCl + 3O₂

500

Write, balance and solve the following:

If 4 moles of nitrogen gas (N₂) react completely, how many moles of ammonia will be produced?

N₂ + 3H₂ -> 2NH₃

8 moles NH₃