Question

post test: chemical reactions
select the correct answer.
which law represents a balanced chemical equation?
a. avogadro’s hypothesis
b. ideal gas law
c. law of conservation of mass
d. newton’s first law of motion
e. newton’s second law of motion

Explanation:

To determine the law representing a balanced chemical equation, we analyze each option:

• Option A: Avogadro’s hypothesis relates to gas volumes and moles, not balancing equations.
• Option B: The ideal gas law (\(PV = nRT\)) describes gas behavior, not equation balancing.
• Option C: The law of conservation of mass states mass is neither created nor destroyed in a reaction. Balanced chemical equations ensure the same number of each atom on both sides, reflecting this law.
• Option D: Newton’s first law of motion concerns inertia, unrelated to chemical reactions.
• Option E: Newton’s second law of motion relates force, mass, and acceleration, not chemistry.

Answer:

C. law of conservation of mass