Chemistry Exam

Covalent Molecules

100

How many atoms of an element are in a molecule with a name that begins with octa-

8

200

What ending do we use for all binary molecular compounds?

-ide

300

Name the covalent molecular compound N₂O₃

dinitrogen trioxide

400

Name the covalent molecule Cl₂O₇

dichlorine heptoxide

Ionic Molecules

100

What specific order is a binary ionic compound written?

The first element is a cation and the second is an anion.

200

What classification of elements do ionic compounds consist of

A metal atom and a nonmetal atom

300

What is the molecular formula of the compound Calcium chloride

CaCl₂

400

What is the name of the binary ionic compound AlCl₂

Aluminum chloride

Balancing equations

100

Balance:

H₂+O₂->H₂O

2H₂+O₂->2H₂O

200

Balance:

Al+HCl -> AlCl₃+H₂

2Al + 6HCl -> 2AlCl₃+3H₂

300

Balance:

CO₂+H₂O -> C₆H₁₂O₆+O₂

6CO₂+6H₂O -> C₆H₁₂O₆+6O₂

400

Balance:

P₄O₁₀ + H₂O → H₃PO₄

P₄O₁₀+6H₂O -> 4H₃PO₄

Special Ionic Molecules

100

What is the molecular formula for cyanide

CN^-

200

What is the name of the compound NH₄⁺

Ammonium

300

What is the name of the molecular compound PO₄^3-?

Phosphate

400

What is the molecular formula for chlorite and chlorate?

Chlorite - ClO₂^-

Chlorate - ClO₃​^-​​​

Types of reactions

100

What is a combination reaction?

When two or more substances form a single product

200

What are the products of a combustion reaction?

Water and carbon dioxide

300

How do elements "switch" in a single and double replacement reaction?

Single - an element replaces the corresponding element

Double - two compounds react and switch partners 

400

Write an example of a double replacement reaction. You can write this using general letters like "A" and "B"

AB+CD -> AD+CB