Answer is: the molecular formula for this compound is K₂O.
M(KₓOₐ) = 94 g/mol; molecula mass of the unknown compound.
M(KₓOₐ) = x·Ar(K) + a·Ar(O) · g/mol.
94 g/mol = 39·x + 16·a · g/mol.
Only possible solution is x = 2 and a = 1.
94 g/mol = 39 · 2 + 16 · 1 · g/mol.
Ar is relative atomic mass (the ratio of the average mass of atoms of a chemical element to one unified atomic mass unit) of an element .
