乌洛托品在合成、医药、染料等工业中有广泛用途,其结构式如图所

乌洛托品在合成、医药、染料等工业中有广泛用途,其结构式如图所示。将甲醛水溶液与氨水混合蒸发可制得乌洛托品。若原料完全反应生成乌洛托品,则甲醛与氨的物质的量之比应为(  )

A1∶1                                 B2∶3

C3∶2                                 D2∶1

答案

[解析] 由乌洛托品的结构式可知,乌洛托品的分子式为C6H12N4,根据原子守恒可知,甲醛与氨的物质的量之比为3∶2

[答案] C

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