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Reakcja:
3Ca + 2H₃PO₄ -> Ca₃(PO₄)₂ + 3H₂
Mf=40×3 + 31×2 + 16×8= 310g/mol
120g ca - 310gf
20g - xg
x= 51,67g
2.
Cp=ms/mr×100%= 20/170=11,76%