Question

define and illustrate the following terms:
mass
law
conservation
law of conservation of mass

Explanation:

• Mass: Mass is a measure of the amount of matter in an object. It is a fundamental property of an object and is independent of its location. For example, a 1 - kilogram block of iron has the same mass on Earth and on the Moon.
• Law: A law is a concise statement that describes a fundamental relationship or regularity in nature. For example, Newton's laws of motion describe the relationship between force, mass, and motion.
• Conservation: Conservation refers to the principle that certain quantities remain constant in a closed system. For example, in a chemical reaction, the number of atoms of each element is conserved.
• Law of Conservation of Mass: This law states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. For example, when hydrogen and oxygen react to form water ($2H_{2}+O_{2}

ightarrow 2H_{2}O$), if we start with 4 grams of hydrogen and 32 grams of oxygen, we will get 36 grams of water.

Answer:

• Mass: Measure of matter amount (e.g., 1 - kg iron block).
• Law: Concise nature - relationship statement (e.g., Newton's laws).
• Conservation: Quantity constancy in closed system (e.g., atom count in reaction).
• Law of Conservation of Mass: Reactant mass = product mass (e.g., $H_{2}+O_{2}

ightarrow H_{2}O$ mass balance).