Question

Pak minta bantuan donk heheh :D dengan caranya nya

Answer 1

A. N2O3
   2N + 3O = 0
  2N + 3(-2) = 0
  2N - 6 = 0
   2N = +6
    N = +3
b. PH4Br
   P + 4H + Br = 0
  P + 4(+1) + (-1) = 0
  P + 4 - 1 = 0
  P + 3 = 0
  P = -3

c. K2MnO4
  2K + Mn + 4O = 0 
 2(+1)+ Mn + 4 (-2) = 0
 2 + Mn -8 = 0
 Mn - 6 = 0
 Mn = +6

d. Cr2O72-
  2Cr + 7O = -2
  2Cr + 7(-2) = -2
  2Cr  - 14 = -2
  2 Cr = -2 +14
  2 Cr = +12
    Cr = +6