Question

The emperical formula of a compoundis CH2O. It's molecular weight is 90. Calculate the molecular formula of the compound?

Answer 1

Answer:

Empirical formula

C=12

H=1

O=16

CH2O=12+1(2)+16 =30grm

Molecular weight=90grm

Molecular formula =90/30=3

(CH2O)3=C3H6O3

Answer 2

Answer:

n = Molecular Weight / Emperical Weight

Emperical Weight = 12+2+16 = 30

n = 90/30 = 3

Molecular Formula

3× CH20

C3H6O3

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