Ответы на вопрос:
Объяснение:
Mr(CaSO4) = 40 + 32 + 16*4 =136
W(Ca) = Ar(Ca) *n / Mr(CaSO4) *100% = 40*1 / 136 *100% =29%
Mr(CaCl2) = 40 + 35,5*2 =111
W(Ca) = Ar(Ca) *n / Mr(CaCl2) *100% = 40*1/111 *100% =36%
Mr(CaHPO4) = 40 + 1+31+16*4 =138
W(Ca) = Ar(Ca) *n / Mr(CaHPO4) *100% = 40*1 / 138 *100% =29%
Mr(Ca(H2PO4)2) = 40+1*4 + 31*2 + 16*8 =234
W(Ca) = Ar(Ca) *n / Mr(Ca(H2PO4)2 *100% = 40*1 / 234 *100% =17%
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