Question

What is the law of conservation of mass?

• A. Energy can be created in a reaction
• B. The number of reactants must always equal the number of products
• C. Mass and energy are interchangeable during reactions
• D. Mass can neither be created nor destroyed in a chemical reaction

Hint:

Law of Conservation of Mass: Mass of reactants = Mass of products.

Answer 1

The Correct Option is D

Step 1: Recall the law of conservation of mass.
The law of conservation of mass is a fundamental principle stating that matter cannot be created or destroyed in a chemical reaction.
Step 2: Evaluate the given options.
(1) Incorrect; this violates the law of conservation of energy in a closed system.
(2) Incorrect; the number of moles or molecules of reactants and products may differ.
(3) Incorrect for typical chemical reactions; this is related to mass-energy equivalence in nuclear reactions.
(4) Correct; this accurately states the law of conservation of mass.