甲、乙兩化合物均由 A、B 兩元素組成，其重量百分組成：甲為 20% A 和 80% B，乙為 25% A 和 75% B，已知甲的化學式為 AB2，則乙的化學式為何？(A)AB3 (B)A3-58題庫

39. 甲、乙兩化合物均由 A、B 兩元素組成，其重量百分組成：甲為 20% A 和 80% B，乙為 25% A 和 75% B，已知甲的化學式為 AB2，則乙的化學式為何？
(A)AB3
(B)A3B2
(C)A2B3
(D)A3B

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