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O=16
H₂O = 2 × 1 + 16= 2+16= 18
18-100%
2 - x%H
x=2×100/18=200/18=11,1% - wodór
18-100%
16 -x%O
x=16×100/18=1600/18=88,9% - tlen
H₂O = 2 × 16
1 × 8
Odp. Stosunek wynosi 1 × 8. Zawartość procentowa wodoru wynosi 11,1% a tlenu 88,9%.