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【多选题】
鉴别丙醛和丙酮可用的试剂是A.
2,4-二硝基苯肼
B.
碘的氢氧化钠溶液
C.
饱和亚硫酸氢钠溶液
D.
托伦试剂
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举一反三
【简答题】However, neither matter nor energy is created or destroyed in a chemical reaction.
【简答题】深度为4的二叉树的结点总数最多为()个。
【简答题】Which ONE of the following statements is FALSE for a catalyst in a chemical reaction?A. It is an accelerator of the
reaction. B. It is consumed in the reaction. C. It does not affect the equilibrium
o...
【单选题】A catalyst is by definition a substance that increases the rate of approach to equilibrium of a chemical reaction in the reaction.
A.
without being substantially consumed
B.
not at all comsumed
C.
with decreasing significantly
D.
with the change of it ’ s composition
【简答题】What can a catalyst do in a chemical reaction?
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