According to john dalton's observations, when elements combine in a compound, a. the ratio of their masses is always the same. b. each element contributes an equal number of atoms. c. their volumes are always equal. d. their masses are always equal.

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Riley Reilly

Chemistry

17 February, 07:21

According to john dalton's observations, when elements combine in a compound, a. the ratio of their masses is always the same. b. each element contributes an equal number of atoms. c. their volumes are always equal. d. their masses are always equal.

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Edgar Duncan · Answer 1

I don't see how volumes or masses would always be equal if you have elements of different volumes and mass, and compounds don't always have equal numbers of both elements, like CO2 has twice as many Oxygen as Carbon, so it must be the ratio one.