What, if any, is the difference between the molecular weights of molecule A (left) vs molecule B (right)? [Image]

What, if any, is the difference between the molecular weights of molecule A (left) vs molecule B (right)?

Select an option to attempt

1. A
   Molecular weight of the two are identical
2. B
   Molecular weight of A is less by 20 Daltons
3. C
   Molecular weight of A is more by 14 Daltons
4. D
   Molecular weight of B is more by 2 Daltons

Correct Answer: Option C

Explanation

Molecular weight difference between molecule A and B

:Comparing the two molecular structures in the image:• Molecule A has one additional$-\text{CH}_2-$group compared to Molecule B.• Molecular weight of a$-\text{CH}_2-$group = 12 (C) + 2×1 (2H) = 14 Da.Therefore, Molecule A is more massive by 14 Daltons than Molecule B.Answer: Molecular weight of A is more by 14 Daltons (Option 3).