Question

If the masses of Cr and O are in the ratio 13 : 12
in CrO3, then the ratio of O that combines with the
same mass of Cr in Cr2,O3 and Cr2O7, is
(1) 1:2
(2) 1:4
(3) 3:7
(4) 2:5​

Answer 1

Answer:

Explanation:

4)2:5...