Question

Дано: PвS
w(Pв)-?
w(S)-?​

Answer 1

Объяснение:

Mr(PbS)= 207 +32= 239

w(Pb)=nAr(Pb)/Mr(PbS)= 1•207/239= 0.8661 (86.61%)

w(S)=nAr(S)/Mr(PbS)= 1•32/239= 0.1339 (13.39%)