The mass fraction of this solution is 5%.

这个溶液的质量分数是5%。

We need to calculate the mass fraction of each component.

我们需要计算每种成分的质量分数。

In chemistry, mass fraction is an important concept.

在化学中，质量分数是一个重要的概念。

Do you know how to measure the mass fraction of salt in water?

你知道如何测量盐在水中的质量分数吗？

This experiment requires us to record the mass fraction of each substance.

这个实验要求我们记录每种物质的质量分数。

The mass fraction of isocyanurate was calculated by piperidine method.

采用六氢吡啶法测出了异氰腺酸酯的质量分数。

The suitable mass fraction of epoxy resin in the hybrid emulsion was 3%～4%.

环氧树脂的质量分数在3%～4%为宜。

Decreasing proportion solvent increases the mass fraction of oleic acid and linoleic acid.

随着溶剂配比的降低．晶体中油酸和滤液中亚油酸的质量分数均提高。

Examples are given to differentiate quantity ratio and mass fraction, mol ratio and mol fraction, cuba.

例析了比率相关量如质量比与质量分数 、 摩尔比与摩尔分数 、 体积比与体积分数的区别.

This agent doesn't contain sulfate, nitrate and metal iron. The mass fraction of aluminum ion is over 4.17%.

该交联剂不含硫酸根、硝酸根及金属铁，铝离子质量分数大于4.17%。