to which classes of matter-elements compounds and/or mixtures- do the following laws apply
a.law of mass conservation b. law of definite composition c. law of multiple proportions
a) law of mass conservation :
Matter can neither be created nor destroyed, whether it is an element, compound, or mixture.
so
this law applies to all substances — elements, compounds and mixtures.
b) law of definite composition :
The law of definite composition applies to compounds only,
because it refers to a constant, or definite composition of elements within a compound.
c) law of multiple proportions:
The law of multiple proportions applies to compounds only
because it refers to the combination of elements to form compounds.
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