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Question

Define RMM based on hydrogen as well as carbon-12 scale.

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Solution

RMM (Relative molecular mass) based on Hydrogen scale: The relative molecular mass of an element or a compound is the ratio of mass of one molecule of the element or a compound to the mass of one atom of hydrogen.

RMM = Mass of 1 molecule of element or compoundMass of 1 atom of hydrogen

RMM (Relative molecular mass) based on Carbon-12 Scale: The relative molecular mass of an element or a compound is the ratio of mass of one molecule of the element or a compound to the mass of 112th part of mass of one atom of carbon - 12.

RMM = Mass of 1 molecule of element or compound112th part of the mass of 1 atom of carbon12


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