w = Ar(X) * a * 100%
Mr вещ-ва
Mr (Fe2O3) = 56*2 + 16*3 = 160
w(O) = 16 * 3 * 100% = 30 %
160
ответ: w(O) = 30 %
M(Fe2O3)=160г/мольm(O)=16*3=48гW(O)=48/160*100%=30%
w = Ar(X) * a * 100%
Mr вещ-ва
Mr (Fe2O3) = 56*2 + 16*3 = 160
w(O) = 16 * 3 * 100% = 30 %
160
ответ: w(O) = 30 %
M(Fe2O3)=160г/моль
m(O)=16*3=48г
W(O)=48/160*100%=30%