What is the molecular formula of a compound with the empirical formula of p2o3 and a gram molecular mass of 284 grams?

The answer is: the molecular formula of a compound is P₄O₁₀.

M(P₂O₅) = 2 · Ar(P) + 5 · Ar(O) · g/mol.

M(P₂O₅) = 2 · 31 + 5 · 16 · g/mol.

M(P₂O₅) = 142 g/mol; molar mass of empirical formula.

M(PₓOₙ) = 284 g/mol; molecular mass of unknown compound.

M(PₓOₙ) : M(P₂O₅) = 284 g/mol : 142 g/mol.

M(PₓOₙ) : M(P₂O₅) = 2 : 1.

you need to have a picture of the atom that way we can answer it