What is the molecular formula compound with the empirical formula P205 and gram molecular formula of 284 grams?

Molecular formula = P₄O₁₀

Explanation:

Given data:

Empirical formula = P₂O₅

Gram molecular mass = 284 g/mol

Molecular formula = ?

Solution:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass  = 2 ×31 + 5× 16 = 142

n = 284 / 142

n = 2

Molecular formula = n (empirical formula)

Molecular formula =2 (P₂O₅)

Molecular formula = P₄O₁₀

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