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1. P₄ + 5O₂ --> P₄O₁₀
2. P₄O₁₀ + 6H₂O --> 4H₃PO₄
zad. 2
l=2πr (obwód/długość koła)
25l = 100m
25*2πr = 100m
r= 100m/50π
r= 2/π m ≈0,64m
Proszę :)