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52:48
52/52:48/16
1:3
odp-cr03
mcro3=52+48=100
O=48% O=16u
52u--------52%
x-----------100%
x=52u*100%/52%
x=100u
100u - 52u = 48u
48u / 16u = 3
Czyli wzór to: CrO₃