Mr(SO3) = Ar(S) + 3*Ar(O) = 32 + 3*16 = 80
ω(O) = (3*Ar(O)/Mr(SO3))*100% = (3*16/80)*100% = 60%
Ответ: б) 60%
Mr(SO3) = Ar(S) + 3*Ar(O) = 32 + 3*16 = 80
ω(O) = (3*Ar(O)/Mr(SO3))*100% = (3*16/80)*100% = 60%
Ответ: б) 60%