An oxide of niobium has a cubic unit cell in which there are oxide ions at the middle of each edge and niobum atoms at the center of each face. what is the empirical formula of this oxide?

Empirical formula:

Explanation:

Cell formula:

Empirical formula:

This formula corresponds to a niobium valence of +4

20 drops hope this

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.