Question

Escreva o NOX de cada elemento: Cr2O3, K2Cr2O6

Answer 1

Nox do O: -2
K: +1

$Cr_{2} O_{3}$

2 Cr + 3 . (-2) =0
2 Cr = 6
Cr = 3

$K_{2} Cr_{2} O_{6}$

2.1 + 2Cr + 6. (-2) = 0
2 + 2Cr - 12 = 0
2 Cr = 12 -2
2 Cr = 10
Cr = 5