K2MnO4
M(K2MnO4) = 39*2+55+16*4 = 197 g/mol
W(K) = 39*2/197 * 100% =39.6%
W(Mn) = 55 / 197 * 100% = 27.9 %
W(O) = 16*4 / 197 * 100% = 32.5%
ZnCL2
M(ZnCL2) = 65 + 35.5*2 = 136 g/mol
W(Zn) = 65/ 136 * 100% = 47.8%
W(CL2) = 35.5*2 / 136*100% = 52.2%
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K2MnO4
M(K2MnO4) = 39*2+55+16*4 = 197 g/mol
W(K) = 39*2/197 * 100% =39.6%
W(Mn) = 55 / 197 * 100% = 27.9 %
W(O) = 16*4 / 197 * 100% = 32.5%
ZnCL2
M(ZnCL2) = 65 + 35.5*2 = 136 g/mol
W(Zn) = 65/ 136 * 100% = 47.8%
W(CL2) = 35.5*2 / 136*100% = 52.2%