Question

Mr(O3)= Mr(Fe3O4)= Mr(K2ZnO2)= Mr[Ca3(PO4)2]=​

Answer 1

Ответ:

Mr(O3) = 3 x Ar(O) = 3 x 16 = 48 a.m.u.

Mr(Fe3O4) = 3 x Ar(Fe) + 4 x Ar(O) = 3 x 56 + 4 x 16 = 232 a.m.u.

Mr(K2ZnO2) = 2 x Ar(K) + Ar(Zn) + 2 x Ar(O) = 2 x 39 + 65 + 2 x 16 = 175 a.m.u.

Mr[Ca3(PO4)2] = 3 x Ar(Ca) + 2 x Ar(P) + 4 x Ar(O) = 3 x 40 + 2 x 31 + 4 x 16 = 310 a.m.u.