Mr (Ba CO3)= Mr (Rb2O)=

Question

Mr (Ba CO3)=
Mr (Rb2O)=

Answer 1

Mr(BaCO3)= Ar(Ba) + Ar(C) + 3*Ar(O)= 137 + 12 + 3*16= 197                           Mr(Rb2O)= 2*Ar(Rb) + Ar(O) = 2*85 + 16 =186

Answer 2

1)137+12+16*3=197
2)85*2+16=186