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BITSAT2018ChemistrySome Basic Concepts of ChemistryActual

The empirical formula and molecular mass of a compound are CH 2 O and 180 g respectively. The molecular formula of the compound will be

Options

  1. AC 9 H 18 O 9
  2. BCH 2 O
  3. CC 6 H 12 O 6
  4. DC 2 H 4 O 2

Correct answer

C. C 6 H 12 O 6

Step-by-step solution

As we know that, the Molar mass of Carbon=12 Molar mass of Hydrogen=1 Molar mass of Oxygen=16 Empirical formula mass = CH 2 O = 12 + 2 + 1 × 16 = 30 Molecular mass = 180 n =  Molccular Mass   Empirical formula mass  = 100 30 = 6 ∵ Molecular formula = n × empirical formula ∴ Molecular formula = 6 × CH 2 O = C 6 H 12 O 6

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