Law of Conservation of Mass

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. The total mass of the reactants equals the total mass of the products.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

What is evidence of a chemical reaction?

Back

Evidence of a chemical reaction includes changes such as color change, temperature change, gas production (bubbles), and the formation of a precipitate.

Front

What are open and closed systems in chemistry?

Back

Open systems can exchange both matter and energy with their surroundings, while closed systems can exchange energy but not matter.

Front

What does it mean for a reaction to be exothermic?

Back

An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, to its surroundings.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes a chemical change in a reaction, appearing on the left side of a chemical equation.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction, appearing on the right side of a chemical equation.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, reflecting the Law of Conservation of Mass.

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another, such as melting, freezing, or boiling.