Chemical Reactions

Front

What is a chemical reaction?

Back

A chemical reaction is a process in which one or more substances change into one or more different substances.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change in a reaction.

Front

What are products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of each reactant and product involved in a chemical reaction.

Front

How do you determine the number of atoms in a compound?

Back

To determine the number of atoms in a compound, multiply the subscript of each element by the coefficient in front of the compound.

Front

What is the difference between an endothermic and exothermic reaction?

Back

An endothermic reaction absorbs energy, while an exothermic reaction releases energy.