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Mole concept and Stoichiometry — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryMole concept and Stoichiometry1 Mark
MCQ
If two compounds have the same empirical formula but different molecular formulae, they must have
  • A
    Different percentage composition.
  • B
    Different molecular mass.
  • C
    Same viscosity.
  • D
    Same vapour density.
✓

Answer

B.Different molecular mass.
Explanation: The empirical formula represents the simplest whole-number ratio of the elements in a compound, while the molecular formula specifies the actual number of atoms of each element in a molecule. If the molecular formulas are different, it means the compounds have different molecular masses.

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