Ch. 21 - Chemical Reactions & Equations

In the formula for aluminum chloride, AlCl₃, the number "3" is a ____.

• coefficient
• formula
• reactant
• subscript

Which of the following symbols in a chemical equation means "produces"?

• +

• [p]

• (aq)

• ------>

What type of reaction is represented by the following equation: 2H₂ + O₂ -> 2H₂O?

• synthesis/combination

• single displacement

• double displacement

• decomposition

Which of the following general formulas represents a single-displacement reaction?

• AB -> A + B
• A + B -> AB
• A + BC -> AC + B
• AB + CD -> AD + CB

The formula AB -> A + B represents what type of chemical reaction?

• synthesis
• decomposition
• single displacement
• double displacement

In a ___ reaction, two or more substances combine to form another substance.

• synthesis
• decomposition
• single displacement
• double displacement

In chemical equations, ___ represent the number of units of each substance.

• coefficients
• reactants
• products
• precipitates

___ is a way to describe a chemical reaction using chemical formulas and symbols.

• A chemical equation
• Synthesis
• A physical law
• The law of conservation of matter

New substances produced by a chemical reaction are ___.

• resultants
• reactants
• coefficients
• products

A type of chemical reaction that occurs when a substance reacts with oxygen to produce energy in the form of light.

• chemical reaction
• exergonic reaction
• combustion reaction
• decomposition reaction