а) Mr(KOH) = 56
W(K) = Ar(K) *n / Mr(KOH) *100% = 39*1 / 56 *100% = 69,6%
W(O) = Ar(O) * n / Mr(KOH) *100% = 16*1 / 56 *100% = 28,6%
W(H) = Ar(H) * n / Mr(KOH) *100% = 1*1 / 56 *100% = 1,8%
б) Mr(TeO3) = 176
W(Te) = Ar(Te) *n / Mr(TeO3) *100% = 128 * 1 / 176 *100% = 73%
W(O) = Ar(O) * n / Mr(TeO3) *100% = 16 * 3 / 176 *100% = 27%
в) Mr(CuSO4) = 159,5
W(Cu) = Ar(Cu) * n / Mr(CuSO4) *100% = 63,5 * 1 / 159,5 *100% = 40%
W(S) = Ar(S) * n / Mr(CuSO4) *100% = 32 *1 / 159,5 *100% = 20%
W(O) = Ar(O) * n / Mr(CuSO4) *100% = 16 * 4 / 159,5 *100% = 40%