Question

8. 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 Cr, 0, and Cr,O, is
(1) 1:2
(2) 1:4
(3) 3:7
(4) 2:5​

Answer 1

Explanation:

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