This is the 10473rd most frequent Russian word.
веществом
The Russian word "веществом" means "substance" (in the instrumental case).
In this sentence, the word 'веществом' is used in the instrumental case, indicating that the substance is the tool or means used in the experiment.
Учёные провели эксперимент с этим веществом.
The scientists conducted an experiment with this substance.
Here, 'веществом' refers to a form of matter, specifically a solid one, highlighting its physical properties.
Этот материал состоит из твёрдого вещества.
This material is made of solid substance.
In this context, 'веществом' is used to denote a general term for a subject of study in scientific or academic research.