作者cow1205 (cow)
看板TransBioChem
标题[化学] 请教一题倍比定律
时间Sat Apr 20 13:47:06 2013
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，
可是又不太知道怎麽下手
题目很落落长，感谢大大看完
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1F：→ biup2:为什麽不能选B? 04/20 16:37
2F：→ winnerken:我会写B.... 04/20 17:20