A student forgot to measure the mass of an empty 100mL beaker before adding about 2g of a chemical to it, and decided to simply obtain the mass of another empty 100mL beaker instead. Would this be a satisfactory alternative?

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  1. Usually no because most beakers are not matched sets. There are such things as matched sets of test tubes, and vials to hold solutions.

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  2. What do you mean by matched sets?

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  3. Someone has taken the time to weigh 100 test tubes (or perhaps more) and picked sets of two or three that have the exact weight. They are sold in sets of two or three but at a handsome price. Someone has to pay for the time it takes to do all that work. The other kind of matched sets are those used in colorimetry and spectrophotometry. In those matched sets, the vials are chosen so that, when filled with a solvent (for example water), they will have the same absorbance.

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  4. Oh thank you:) That makes sense.

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