W(K) = Ar(K) * n(K) / Mr(K2SO4) * 100% = 39 *2 / 174 *100% = 44,83%
W(Si) = Ar(Si) * n(Si) / Mr(CaSiO3) * 100% = 28 * 1 / 116 *100% =24,14 %
W(Cl) = Ar(Cl) *n(Cl) / Mr(CuCl2) *100% = 35,5 * 3 / 134,5 *100% = 79,18 %
W(N) = Ar(N) * n(N) / Mr(AgNO3) *100% = 14 * 1 / 170 *100% = 8,23%