A compound contains atoms of three elements A, B, and C. If If the oxidation number of A is +2, B is +5, and C is-2, the possible formula of the compound is:

The possible formula be AxByCz .As compound is neutral, so x(+2) + y(+5) + z(-2) = 0⇒2x + 5y - 2z = 0By hit and trial, we get: x = 1, y = 2, z = 6 and x = 3, y = 2, z = 8.So compound is A(BC3)2 or A3(BC4)2.