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Answer:
since mass percent is based on the proportions of elements in a compound, the mass of a sample does not matter
The mass percent or percentage by mass of a chemical compound is a constant.
What is mass percent?
Mass percent can be defined as percentage by mass and it is the concentration of a given amount (quantity) of element in a chemical compound or a component of a mixture.
The mass percent or percentage by mass of a chemical compound is a constant, regardless of the amount of substance that is present. Thus, all chemical compound always have a constant composition because mass percent is typically based on the proportions of the elements contained in a chemical compound.
Read more on mass here: brainly.com/question/3173452