Which of the following statements about the molecular mass is correct?
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a
Molecular formula shows the exact number of different types of atoms present in a molecule
b
Molecular formula can be obtained from empirical formula if molar mass is known
c
Percentage composition of a compound can be calculated from its molecular formula
d
All the statements are correct
answer is D.
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Detailed Solution
Molecular formula(M.F) of a compound tells about the original no. of atoms present in it.Empirical formula(E.F) gives the simplest ratio of atoms.M.F = (E.F)nwhere, n=molecular weightE.F weight