Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products) through the breaking and forming of chemical bonds.

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 coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

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

Back

Synthesis reaction, where two or more reactants combine to form a single product.

Front

What is a decomposition reaction?

Back

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

Front

What is a combustion reaction?

Back

A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat.

Front

What is a single replacement reaction?

Back

A reaction where one element replaces another element in a compound.

Front

What is rusting?

Back

A chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide (rust).

Front

What does the symbol Δ represent in a chemical equation?

Back

It represents a change in heat or energy during a reaction.

Front

What is surface area in the context of chemical reactions?

Back

The total area of the surface of a solid substance, which affects the rate of reaction; smaller particles have a larger surface area.