Al2O3
W(Al) -?
W(O) -?
Cr2O3
W(Cr) -?
W(O) -?
SO2
W(S) -?
W(O) -?
NH3
W(N) -?
W(H) -?
W(Al) -?
W(O) -?
Cr2O3
W(Cr) -?
W(O) -?
SO2
W(S) -?
W(O) -?
NH3
W(N) -?
W(H) -?
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Answers & Comments
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Объяснение:
Mr(Al2O3)=2Ar(Al)+3Ar(O)=2×27+3×16=102г/моль
w(Al)=n×Ar(Al)/Mr(Al2O3)=2×27/102=52%
w(O)=n×Ar(O)/Mr(Al2O3)=3×16/102=48%
также само и другие