Multiple Choice
Which statement best describes the law of conservation of mass?
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2. Atoms & Elements
Law of Conservation of Mass
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How did Antoine Lavoisier demonstrate that mass is conserved in chemical reactions?
A
He measured the volume of gases produced during reactions to prove mass conservation.
B
He used a microscope to observe atoms rearranging during chemical reactions.
C
He calculated the energy changes in reactions to show that mass remains constant.
D
He performed experiments in sealed containers and showed that the total mass of reactants equals the total mass of products.
Verified step by step guidance1
Understand the principle of the law of conservation of mass, which states that mass cannot be created or destroyed in a chemical reaction.
Recognize that Antoine Lavoisier designed experiments where chemical reactions occurred inside sealed containers to prevent any matter from entering or leaving the system.
Measure the mass of the sealed container before the reaction starts, ensuring all reactants are inside and accounted for.
Allow the chemical reaction to proceed inside the sealed container, ensuring no gases or solids escape during the process.
Measure the mass of the sealed container after the reaction is complete and compare it to the initial mass to demonstrate that the total mass remains constant, confirming mass conservation.
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