A compound has a composition of 46.7 mass % of element A and 53.3 mass % of
element B. A and B also form another second binar compound. If the two compounds are
consistent with the law of miltiple proportions,which following compositions
could be the second compound?
(A)23.4 mass%A,76.6 mass%B
(B)30.4 mass%A,69.6 mass%B
(C)33.3 mass%A,66.7 mass%B
(D)53.3 mass%A,46.7 mass%B
(E)73.3 mass%A,26.7 mass%B
ANS:C
我在想是不是从A、B在化合物中各占的重量比例相除所形成的比例，
可是又不太知道怎么下手
题目很落落长，感谢大大看完

为什么不能选B?

我会写B....