Unit 4 Practice Test

Front

What type of reaction is represented by the exchange of ions between two compounds?

Back

Double Replacement Reaction

Front

What is the balanced equation for the photosynthesis process?

Back

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Front

How many oxygen atoms are present in one molecule of calcium hydroxide, Ca(OH)₂?

Back

2

Front

What is the term for the small number written after an element in a chemical formula?

Back

Subscript

Front

How many nitrogen atoms are in the compound ammonium hydroxide, NH₄OH?

Back

1

Front

What is a Coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are present.

Front

What is the difference between a Coefficient and a Subscript?

Back

A Coefficient indicates the number of molecules, while a Subscript indicates the number of atoms in a molecule.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What does it mean for a chemical equation to be balanced?

Back

The number of atoms for each element is the same on both sides of the equation.