b) K₂S39 · 2+32 = 110g
110 g - 100%78 g - x%x ≈ 71% potasu100% - 71% = 29% siarki
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m Na = 2 * 23 = 46u
m S = 32u
Na : S = 46 : 32 = 23 : 16 (czyt. 23 do 16)
b) K₂S
39 · 2+32 = 110g
110 g - 100%
78 g - x%
x ≈ 71% potasu
100% - 71% = 29% siarki