tthall7188 tthall7188
  • 04-04-2018
  • Chemistry
contestada

What is the oxidation number of chromium in k2cr2o7?



1.



+12

2.



+2

3.



+3

4.



+6?

Respuesta :

WaleMaths
WaleMaths WaleMaths
  • 05-04-2018
K₂Cr₂O₇

(+1*2) + (x*2) + (-2*7)

2 + 2x - 14 = 0
2x - 12 = 0

2x = 12

x = 12/2

x = +6...
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