(2分)最近科学家研究确认,一些零食特别是油炸食品含有致癌物质丙烯酰胺(C 3 H 5 ON)。请回答: (1)丙烯酰胺分子中碳、氢、氧、氮的原子个数比为 。 (2)丙烯酰胺的相对分子质量为 (3)丙烯酰胺中氮元素的质量分数为 (精确到0.1%)。
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A.
which can make you happy though heat regeneration.
B.
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