SNC 2P1 Chemistry Unit Test Review

What are the reactants in the following word equation?

zinc + copper sulfate --> zinc sulfate + copper

• zinc sulfate and copper

• zinc sulfate and copper sulfate

• zinc and copper sulfate

• zinc and copper

Which of the following statements is true regarding word equations and chemical equations?

• In both, substances on the right side of the reaction are called reactants.

• The word equation provides more detail than the chemical equation.

• The skeleton equation contains the names of the chemicals written out in full.

• In both, an arrow indicates the direction in which the reaction is going.

The law of conservation of mass states that in any given chemical reaction, the total mass of the reactants

• will be greater than the total mass of the products

• will be less than the total mass of the products

• equals the total mass of the products

• has no relationship to the total mass of the products

What is the balanced form of the following skeleton equation?

N₂ + H₂ --> NH₃

• N₂ + H₂ --> 2NH₃

• N₂ + 3H₂ --> 2NH₃

• 2N₂ + H₂ --> 4NH₃

• 3N₂ + H₂ --> 3NH₃

A reaction in which two reactants combine to make a larger or more complex product is called a

• synthesis reaction

• decomposition reaction

• single displacement reaction

• double displacement reaction

A chemical reaction that follows the general formula

AB --> A + B is called a

• synthesis reaction

• decomposition reaction

• single displacement reaction

• double displacement reaction

A reaction in which an element displaces another element in a compound, producing a new compound and a new element, is called a

• synthesis reaction

• decomposition reaction

• single displacement reaction

• double displacement reaction

Sulfur has sixteen electrons. How many of those are valance electrons?

• 2

• 6

• 8

• 14

A positively charged ion is called a(n)

• cation

• anion

• element

• compound

When aluminum, which is a metal, joins with oxygen, a non-metal, what is the name of the resulting ionic compound?

• oxygen aluminide

• aluminide oxygen

• aluminum oxide

• oxide aluminum