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What is the molecular formula of a compound with the empirical formula SF5 and a formula mass of 254.1 amu?
molecular formula:

What is the molecular formula of a compound with the empirical formula CH2O and a formula mass of 180.156 amu?
molecular formula:



Answer :

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  • The molecular formula of a compound with the empirical formula SF₅ and a formula mass of 254.1 amu is S₂F₁₀.
  • The molecular formula of a compound with the empirical formula CH₂O and a formula mass of 180.156 amu is C₆H₁₂O₆.

How to calculate molecular formula?

The molecular formula is a notation indicating the number of atoms of each element present in a compound.

The molecular formula of a compound with given empirical formula can be calculated as follows:

molecular formula = (empirical formula)n

The molecular formula of the given compound is as follows:

(SF5)n = 254.1

{32 + 19(5)}n = 254.1

127n = 254.1

n = 2

Molecular formula = (SF5)₂ = S₂F₁0

(CH₂O)n = 180.156 amu

{12 + 2 + 16}n = 180.156

(30)n = 180.156

n = 6

Molecular formula = (CH₂O)₆ = C₆H₁₂O₆

  • Therefore, the molecular formula of a compound with the empirical formula SF₅ and a formula mass of 254.1 amu is S₂F₁₀.
  • The molecular formula of a compound with the empirical formula CH₂O and a formula mass of 180.156 amu is C₆H₁₂O₆

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