【简答题】丁酸乙酯(化学式为C 6 H 12 O 2 )是一种无色、具有菠萝香味的液体,常用作食品、饮料的调香剂.根据丁酸乙酯的化学式计算: (1)丁酸乙酯的相对分子质量是______; (2)丁酸乙酯中碳、氢、氧三种元素的质量比是(化成最简整数比)______; (3)丁酸乙酯中碳元素的质量分数是(计算结果精确到0.1%)______.
【简答题】“What’s in a name?”According to Shakespeare’s Romeo and Juliet,there is not too much.“That which we call a rose by any other name would smell as sweet.”But Shakespeare may have been wrong.In most cult...