Chemistry
Grade-8
Easy
Question
Which of the following states that mass is neither created nor destroyed during chemical reactions?
- Law of conservation of mass
- Law of mass action
- Law of definite proportion
- Avogadro’s Law
Hint:
The mass of the reactants is equal to the mass of the products.
The correct answer is: Law of conservation of mass
- The law of conservation of mass states that mass is neither created nor destroyed in chemical reactions.
- For example, carbon atoms in coal become carbon dioxide when burned. A carbon atom changes from a solid structure to a gas, but its mass remains the same.
- The law of conservation of energy also states that no quantity of energy is created or destroyed. For example, if you roll a toy car down a ramp and hit a wall, the energy is converted from kinetic energy to potential energy.
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