Can anyone help me solving this

Option C. C₃H₆O₃

Explanation:

From the question given above, the following data were obtained:

Empirical formula = CH₂O

Molecular mass = 90 g/mol

Molecular formula =?

The molecular formula of the compound can be obtained as follow:

Molecular formula = Empirical formula × n

Molecular formula = [CH₂O]ₙ

But

Molecular formula = molecular mass = 90

Therefore,

[CH₂O]ₙ = 90

Now, we shall determine the value of n in order to obtain the molecular formula of the compound.

[CH₂O]ₙ = 90

[12 + (2×1) + 16]n = 90

[12 + 2 + 16]n = 90

30n = 90

Divide both side by 30

n = 90/30

n = 3

Molecular formula = [CH₂O]ₙ

Molecular formula = [CH₂O]₃

Molecular formula = C₃H₆O₃

dynamic equilibrium is the answer.