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  • Please help! A compound has an emperical formula C2H4O. An independent analysis gave a value of 132.16 for its molecular mass. What is the correct molecular formula?

A compound has an emperical formula C2H4O. An independent analysis gave a value of 132.16 for its molecular mass. What is the correct molecular formula?

  • Option 1)

    C4H4O5

  • Option 2)

    C10H12

  • Option 3)

    C6H12O3

  • Option 4)

    C4H8O5

 

Answers (1)

best_answer

As we have lernt,

 

Molecular Formula -

The molecular formula shows the exact number of different types of atoms present in a molecule of a compound.

- wherein

For glucose, empirical formula is CH2O .its molar mass is 180 gram.

n = molar mass/empirical formula mass = 180/30=6

Hence molecular formula= C6H12O6

 

 

 

Molecular formula  = (C2H4O)n

n = \frac{Molecular\;Mass}{Empirical\;Formula\;mass} = \frac{132.16}{33} = 3

Therefore, Molecular formula is (C2H4O)3 = C6H12O3.


Option 1)

C4H4O5

Option 2)

C10H12

Option 3)

C6H12O3

Option 4)

C4H8O5

Posted by

divya.saini

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