Multiple Choice
Which of the following processes returns carbon to the atmosphere, demonstrating the Law of Conservation of Mass?
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2. Atoms & Elements
Law of Conservation of Mass
Multiple Choice
Which of the following best describes Antoine Lavoisier's contribution to the law of conservation of mass?
A
He proposed the periodic law and organized elements by atomic number.
B
He demonstrated through experiments that mass is conserved in chemical reactions.
C
He developed the quantum mechanical model of the atom.
D
He discovered the existence of protons in the atomic nucleus.
Verified step by step guidance1
Understand the law of conservation of mass: it states that mass is neither created nor destroyed in a chemical reaction.
Recall Antoine Lavoisier's role in chemistry history: he is known as the 'Father of Modern Chemistry' for his careful quantitative experiments.
Recognize that Lavoisier conducted experiments where he measured the mass of reactants and products in chemical reactions, showing that total mass remains constant.
Note that the other options relate to different scientists and discoveries: the periodic law (Mendeleev), quantum mechanical model (Schrödinger, Heisenberg), and discovery of protons (Rutherford).
Conclude that Lavoisier's key contribution was experimentally demonstrating the conservation of mass during chemical reactions.
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