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Calculate the difference in the molecular formulae and molecular masses for

a- HCHO and CH3CHO
b- CH3CHO and C2H5CHO
c- C2H5CHO and C3H7CHO


Each of them have difference of CH2 and im not sure about molecular mass but u can find it in ncert on page where nomenclature of writing names is given.
2 5 2
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