Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom. Iron is an ...

When traveling to the Thuringian Forest or the Harz Mountains, it is impossible to avoid coming across images that are difficult to get used to. Dead spruce trees (Picea abies) dot the landscape like ...

Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...

Per- and polyfluoroalkyl substances (PFAS) are a group of nearly 10,000 long-lasting chemical compounds that stay in the ...

When hearing someone describe the typical preparation of organosulfur compounds, it’s clear the approach is not a very sustainable one. Mixtures of sulfur compounds naturally in crude oil are first ...

In quality control and chemistry, analytical samples are usually mixtures. Understanding the main compound’s assay and the number of impurities or other unwanted substances in the sample is essential ...

In everyday life, for example on food packaging, the word ‘pure’ usually means that something is in its natural state without anything added to it, like sweeteners or preservatives. Natural fruit ...

Figure 1: The synthesis of zeotypes by using ionic liquids and eutectic mixtures. The lack of vapour pressure from the ionic liquid means that these synthetic procedures can be performed in open ...

As oranges are peeled, they spray a tangy, citrus scented oil into the air. The main compound in the fragrant mist is limonene, which can be collected from discarded peels and used in flavorings, ...