A compound with the empirical formula C2HF4 was found to have a molar mass of about 200g/mole. What is the molecular formula of the compound?

is the molecular formula of the compound.

Explanation:

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is :

We are given:

Mass of molecular formula = 200 g/mol

Mass of empirical formula of :

2 × 12 g/mol + 1 × 1 g/mol + 4 × 19 g/mol = 101 g/mol

Putting values in above equation, we get:

Multiplying this valency by the subscript of every element of empirical formula, we get:

is the molecular formula of the compound.

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