Ответы на вопрос:
M(ва₃(ро₄)₂))≈602 w(ba)=[tex] \frac{137*3}{602} *100%= 68.2% w(p)=[tex] \frac{31*2}{602} *100=10.2% w(o)=[tex] \frac{16*8}{602} *100%=21.2%
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