tthall7188 tthall7188

04-04-2018
Chemistry

contestada

What is the oxidation number of chromium in k2cr2o7?

1.

ï¿¼

+12

2.

ï¿¼

+2

3.

ï¿¼

+3

4.

ï¿¼

+6?

Respuesta :

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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