ICSE Class 10 Answered
in case of relative molecular mass of a compound, should we express it in terms of grams? many a times in the questions it is expressed like that and many a times not.
Asked by sankar.goswami | 17 Feb, 2016, 07:21: PM
Expert Answer
The relative molecular mass Mr, of a compound is the sum of the relative atomic masses (atomic weights) of the atomic species as given in the chemical formula. The mass of a molecule is compared with that of an atom of carbon-12.
Relative molecular mass is a dimensionless quantity, it has no unit. This is because they have cancelled in their calculation. A relative molecular mass can be calculated easily by adding together the relative atomic masses of the constituent atoms. For example, In ethanol, CH3CH2OH, it has a relative atomioc mass Mr = 46.
Relative molecular mass is a dimensionless quantity, it has no unit. This is because they have cancelled in their calculation. A relative molecular mass can be calculated easily by adding together the relative atomic masses of the constituent atoms. For example, In ethanol, CH3CH2OH, it has a relative atomioc mass Mr = 46.
Answered by Hanisha Vyas | 18 Feb, 2016, 11:23: AM
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