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  • I need help with The emipirical formula of a compound is CH2O . If its VD is 30 , then its molecular formula is :

The emipirical formula of a compound is CH2O . If its VD is 30 , then its molecular formula is :

  • Option 1)

    CH_2O

  • Option 2)

    C_2H_4O_2

  • Option 3)

    C_3H_6O_3

  • Option 4)

    CH_3OH

 

Answers (1)

best_answer

As discussed in

Empirical formula -

An Empirical formula represents the simplest whole number ratio of various atoms present in a compound.

- wherein

for glucose, empirical formula is CH2O

 

 

 

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

 

 molar mass = 30\times2=60

Empirical formula mass = 12+2+16 = 30

n=\frac{60}{30}

=2

Therefore (CH_{2}O)_{n}=C_{2}H_{4}O_{2}


Option 1)

CH_2O

Option is Incorrect

Option 2)

C_2H_4O_2

Option is correct

Option 3)

C_3H_6O_3

Option is Incorrect

Option 4)

CH_3OH

Option is Incorrect

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Plabita

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