Question

Mass can neither be created nor be destroyed. This is in agreement with which law of chemical combination?
$A.$ Law of definite proportion
$B.$ Law of multiple proportions
$C.$ Law of conservation of mass
$D.$ Law of conservation of momentum

Answer 1

We know chemistry is the study of change of matter from one form to another form. These changes always occur as a result of the combination of two or more different types of matter. There are certain agreements that govern the combination of different elements to form different compounds. These agreements are known as law chemical combinations.

Complete step-by-step answer: In the given question it is given that mass can neither be created nor be destroyed. We have to tell this agreement with which law of chemical combination is. Let us discuss the given law one by one.
Law of definite proportion: This law states that a chemical compound is always found to be made up of the same elements combined together in the same fixed proportion of mass. This law is governed by a French chemist J.L. Proust in $1799.$
Law of multiple proportion: This law states that when two or more elements react to form two or more chemical compounds, then the masses of one of the elements which combined with a fixed mass of the other, bear a simple ratio to one another.
Law of conservation of mass: This law states that when there are any types of changes that are physical and chemical changes, the total mass of the reactant is equal to that of the product or it also states that mass can neither be created nor be destroyed.
Law of conservation of momentum: It states that momentum is always conserved after collision of molecules or atoms.

Thus, we the correct option is $C.$

Note: It is to be noted that whenever a chemical reaction takes place between two or more elements to form a new product. There is no loss or gain of mass. This statement stated by law of conservation of mass.