Вычислите массовые доли Всех элементов в следующих вещества:CL7,H2S,C3N4,K2CR2O7, N H4NO3.

w(Э)=Ar(Э)/Mr*100% CsI Ar(Cs)=133g/mol Ar(I) = 127g/mol Mr(CsI)=260g/mol W(Cs)= 133/260*100=51.2% W(I)=127/260*100=48.8% H2S Ar(H)=1g/mol Ar(S)=32g/mol Mr(H2S)=34g/mol W(H)=2*1/34*100=6%g/mol W(S)=32/34*100=94% C3N4 Ar(C)=12g/mol Ar(N)=14g/mol Mr(C3N4)=92g/mol W(C) = 3*12/92*100=39% W(N)=4*14/92*100=61% K2Cr2O7 Ar(K)=39g/mol Ar(Cr)=52g/mol Ar(O)=16g/mol Mr(K2Cr2O7)=294g/mol W(K)=2*39/294*100=26.5% W(Cr)=2*52/294*100=35.4% W(O) =7*16/294*100=38.1% NH4NO3 Ar(N)=14g/mol Ar(H)=1g/mol Ar(O)=16g/mol Mr(NH4NO3)=80g/mol W(N)=2*14/80*100=35% W(H)=4*1/80*100=5% W(O)=3*16/80*100=60%