What is the mass fraction of oxygen in the compound - вопрос №119889023 от VLev147741 01.03.2021 01:14

Question

Другие предметы: What is the mass fraction of oxygen in the compound whose formula Al2O3?

VLev147741 · Answer

given: Al2O3 find: ω(O) -? Solution: Мr(Al2O3) = 2Аr(Al)  + 3Аr(O) = 2 • 27  + 3 • 16 = 102 ω(O)=3Аr(O)/Мr(Al₂O₃) •100 %= 48/100•100 %  = 47 % Answer : ω(O) = 47 %....