Verified answer

Ответ:

вроде правильно??

Объяснение:

Mr(Ba(OH)2) = 137 + 16*2 + 1*2 = 171

W(Ba) = Ar(Ba) *n / Mr(Ba(OH)2)  *100% = 137 *1 / 171  *100% = 80%

W(O) =Ar(O) *n / Mr(Ba(OH)2)  *100% = 16*2 / 171  *100% = 19%

W(H) = Ar(H) *n / Mr(Ba(OH)2)  *100% = 1*2 / 171  *100% =1%