名词短语
中文翻译：气体的摩尔数
同义词：
['molar number', 'mole quantity']
例句：
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1.The number of moles in the sample is 200.
样本中的摩尔数是200。
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2. The experiment requires precise measurement of the number of moles.
实验需要精确测量摩尔数。
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3. The researcher found that the ratio of carbon to hydrogen in the sample was not consistent with the expected number of moles.
研究者发现样品中碳和氢的比例与预期的摩尔数不一致。