What is the oxidation number of the central metal in the [Co(CN)(H2O)(en)2]2+ ion?

-3 +3 -2 +1

+3

[Co(CN)(H2O)(en)2]2+  x + (-1) + (0) + 2(0) = 2 x - 1 = 2 x = 2 + 1 = 3