Дано BaCO3 w(Ba)=? w(c)=? w(o)=?

Question

Дано
BaCO3
w(Ba)=?
w(c)=?
w(o)=?

Answer 1

М(ВаСО3)=137+12+16*3=197 г/.моль
w(Ва)=137:197*100%=69.54%
w(С)=12:197*100%=6.09%
w(O)=16*3:197*100%=24.37%