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Relative Molecular Mass

Define RMM ba...

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 = $\frac{M a s s o f 1 m o l e c u l e o f e l e m e n t o r c o m p o u n d}{M a s s o f 1 a t o m o f h y d r o g e n}$

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 $\frac{1}{12} t h$ part of mass of one atom of carbon - 12.

RMM = $\frac{M a s s o f 1 m o l e c u l e o f e l e m e n t o r c o m p o u n d}{\frac{1}{12} t h p a r t o f t h e m a s s o f 1 a t o m o f c a r b o n - 12}$

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