Mr(CaSO4) = 40 + 32 + 16*4 = 136
W(Ca) = Ar(Ca) *n / Mr(CaSO4) *100% = 40 *1 / 136 *100% = 29%
W(S) = Ar(S) * n / Mr(CaSO4) *100% = 32 *1 / 136 *100% = 23%
W(O) = Ar(O) *n / Mr(CaSO4) *100% = 16 *4 / 136 *100% = 47%
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Mr(CaSO₄ )= 40+32+16х4=136Mr(CaSO4) = 40 + 32 + 16*4 = 136
W(Ca) = Ar(Ca) *n / Mr(CaSO4) *100% = 40 *1 / 136 *100% = 29%
W(S) = Ar(S) * n / Mr(CaSO4) *100% = 32 *1 / 136 *100% = 23%
W(O) = Ar(O) *n / Mr(CaSO4) *100% = 16 *4 / 136 *100% = 47%