Question

The law of conservation of mass was given by:
A. Dalton
B. Proust
C. Lavoisier
D. Berzelius

Answer 1

Hint: In order to answer the question, to know the name of the person who states the law of conservation of mass, we should go through the whole concept of law of conservation of mass. We will also discuss more about it.

Complete answer:
The law of conservation of mass was given by Lavoisier.
The law of conservation of mass states that matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed, but the total amount of mass remains constant.
We can state this important law another way. The total mass of the universe is constant within measurable limits; whenever matter undergoes a change, the total mass of the products of the change is, within measurable limits, the same as the total mass of the reactants.
According to law of conservation of mass:
\[\;Mass\;of{\text{ }}reactants{\text{ }} = \;Mass\;of{\text{ }}products\]\[\therefore {\text{ }}10{\text{ }}gram{\text{ }}of{\text{ }}CaCO{\text{ }}3 = 3.8{\text{ }}grams{\text{ }}of{\text{ }}CO{\text{ }}2{\text{ }} + {\text{ }}6.2{\text{ }}grams{\text{ }}of{\text{ }}CaO{\text{ }}10{\text{ }}grams{\text{ }}of{\text{ }}reactant = 10{\text{ }}grams{\text{ }}of\,products.\;\] Therefore, it is proved that the law of conservation of mass is followed by the above reaction.

So, the correct answer is Option C.

Note: Lavoisier stated, "Atoms of an object cannot be created or destroyed, but can be moved around and be changed into different particles." History credits multiple scientists with discovering the law of conservation of mass.