molefraction

例句：

1. 1.The concentration of the solute in the solution is determined by measuring its mole fraction.
   通过测量溶质在溶液中的摩尔分数来确定其浓度。
2. 2. In chemistry, a mole fraction is used to describe the proportion of one substance in a mixture.
   在化学中，摩尔分数用于描述混合物中一种物质的比例。
3. 3. The experiment was designed to measure the mole fraction of carbon dioxide in the air.
   这个实验旨在测量空气中二氧化碳的摩尔分数。