Chapter 3: Chemical Reactions

How can you balance a chemical equation?

• change the subscripts

• change the reactants

• change the products

• change the coefficients

A reaction is where two or more elements combine is a _____?

• replacement reaction

• decomposition reaction

• synthesis reaction

• special reaction

When matter can enter or escape from the surrounding during a chemical reaction this is because this reaction is occurring in a(n) ____.

• chemical reaction

• closed system

• evaporation system

• open system

A scientific law that states that matter is not created or destroyed during chemical reactions is the _____.

• Lavoisier's Law

• Law of Conversation of Mass

• Law of Motion

• Boyle's Law

A(n) _____ is a short way of writing out the substances you start with and the results of a chemical reaction.

• chemical reaction

• chemical substance

• chemical equation

• elemental reaction

When matter does not enter or leave during a chemical reaction this is because the reaction occurred in a _______.

• filing system

• compound system

• closed system

• open system

A ______ reaction is where compounds break down into simpler products.

• replacement

• timed

• decomposition

• synthesis

inhibitior

• the amount of substance in a given volume

• biological catalysts that help reactions occur at body temperature

• substance that decreases the rate of a chemical reaction

• the minimum amount of energy needed to start a chemical reaction

activation energy

• the amount of substance in a given volume

• biological catalysts that help reactions occur at body temperature

• a substance that increases the rate of a chemical by lowering the activation energy

• the minimum amount of energy needed to start a chemical reaction

catalyst

• biological catalysts that help reactions occur at body temperature

• substance that decreases the rate of a chemical reaction

• the minimum amount of energy needed to start a chemical reaction

• a substance that increases the rate of a chemical reaction by lowering the activation energy