Question

:c ayuden chicos con respuestas

Answer 1

I. NH3

N + 3(+1) = 0

N + 3 = 0

N = -3

II. K2Cr2O7

2(+1) + 2(Cr) + 7(-2) = 0

+2 + 2Cr -14 = 0

2Cr -12 = 0

2Cr = + 12

Cr = +6

III. MnO4^-

Mn + 4(-2) = -1

Mn -8 = -1

Mn = +7

IV. H2SO3

2(+1) + S + 3(-2) = 0

+2 + S -6 = 0

S - 4 = 0

S = +4

-3, +6, +7, +4

Alternativa d)

SALUDOS!