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2..... --> 2... + 4... + 1.....
caranya:
koefisien:
1...-->a..+b...+c...
koefisien sblm reaksi = sesudh reaksi
Pb: sblm = 1 , sesudah = a
jd a= 1
N: sblm =2, sesudah= b
jd b= 2
O: sblm= 6, sesudah= a+ 2b+2c
jd a+2b+2c=6
1+2.2+2c=6
2c= 6-1-4=1
c=1/2
jd koef.
1..--> 1...+ 2....+1/2....
supaya tdk pcahan mka dikali 2 shg
2...--> 2...+4...+1...