Which of the following best explains how relative atomic mass could be determined from the type of data available to Dalton?


A. By determining the mass of oxygen contained in a sample of water, its exact atomic mass could be determined.


B. By comparing the masses of hydrogen and oxygen contained in a sample of water, the exact atomic masses could be determined.


C. By comparing the mass of hydrogen in the two “parts” of hydrogen and the mass of oxygen in the one “part” of oxygen in water, the relative atomic masses could then be determined.


D. A and B are correct.


E. A, B, and C are all correct.

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