Equations

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products), often involving changes in energy and properties.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not change the substance's chemical identity.

Front

What is decomposition in chemistry?

Back

A type of chemical reaction where a compound breaks down into two or more simpler substances.

Front

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

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 is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a reactant?

Back

A substance that undergoes a chemical change in a reaction.

Front

What is a product?

Back

A substance that is formed as a result of a chemical reaction.

Front

What is a synthesis reaction?

Back

A type of chemical reaction where two or more simple substances combine to form a more complex substance.

Front

What is combustion?

Back

A chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light.

Front

What is a balanced equation for the combustion of methane (CH4)?

Back

CH4 + 2O2 -> CO2 + 2H2O.