题目内容：
饮料中的果味大多来自酯类。丁酸乙酯(C6H12O2)是无色具有菠萝香味的液体，常用作食品、饮料的调香剂。下列关于丁酸乙酯的说法正确的是
A.相对分子质量为116 g
B.由20个原子构成
C.分子中碳、氢、氧原子的个数比为3∶6∶2
D.氢元素质量分数最小
参考答案：
选择题：饮料中的果味大多来自酯类。丁酸乙酯(C6H12O2)是无色具有菠萝香味的液体，常用作食品、饮料的调香剂。下列关于丁酸乙酯的说法正确的是
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