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Q.

Molecular mass is defined as the:


 

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a

The mass of one atom compared with the mass of one molecule


 

b

The mass f one atom compared with the mass of one atom of hydrogen


 

c

The mass of one molecule of any substance compared with the mass of one atom of C – 12


 

d

 None of the above


 

answer is C.

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Detailed Solution

Concept: Molecular mass is a number equal to the sum of the atomic masses of the atoms in a molecule

The molecular mass gives the mass of a molecule relative to that of C12 the atom, which is taken to have a mass of 12. 

Molecular mass is a dimensionless quantity, but it is given the unit Dalton or atomic mass unit as a means of indicating the mass is relative to 1/12  th the mass of a single atom of carbon-12.

Hence molecular mass is defined as the mass of one molecule of any substance compared with the mass of one atom of C – 12.


 

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Molecular mass is defined as the: