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K2O – CaO

K2O = Mr = K2O = 39 x 2 + 16 x 1 = 94

K2 = 39 x 2 / 94 x 100 = 83

O = 16 x 1 / 94 x 100 = 17

94 + 83 + 17 = 194

CaO = Mr = CaO = 40 x 1 + 16 x 1 = 56

Ca = 40 x 1 / 56 x 100 = 71

O = 16 x 1 / 56 x 100 = 28

56 + 71 + 28 = 155

CO2 – SO2

CO2 = Mr = CO2 = 12 x 1 + 16 x 2 = 44

C = 12 x 1 / 44 x 100 = 27

O2 = 16 x 2 / 44 x 100 = 72

44 + 27 + 72 = 143

SO2 = Mr = SO2 = 32 x 1 + 16 x 2 = 64

S = 32 x 1 / 64 x 100 = 50

O2 = 16 x 2 / 64 x 100 = 50

64 + 50 + 50 = 164

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