A vacuum (pl.: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective vacuus (neuter vacuum) meaning "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. [1] .

2021年4月12日 · In science, a vacuum is a volume that contains little or no matter. In other words, a vacuum is a region with an extremely low pressure . The word “vacuum” comes from the Latin word vacuus , meaning “empty.”

Suction filtration is a chemistry laboratory technique which allows for a greater rate of filtration. Whereas in normal filtration gravity provides the force which draws the liquid through the filter …

Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times.

2021年8月16日 · Vacuum equipment is used to generate, maintain, and manipulate pressures below that of the ambient atmosphere. Many common lab procedures require vacuum conditions, such as inert gas purging, cannulation, and solvent evaporation. Vacuum equipment often requires special care to maintain.

In other words, vacuum means any volume containing less gas particles, atoms and molecules (a lower particle density and gas pressure), than there are in the surrounding outside atmosphere. Accordingly, vacuum is the gaseous environment at pressures below atmosphere.

2023年6月15日 · All mass spectrometers operate at very low pressure (high vacuum). This reduces the chance of ions colliding with other molecules in the mass analyzer. Any collision can cause the ions to react, neutralize, scatter, or fragment.

2019年1月4日 · A vacuum is a volume that encloses little or no matter. In other words, it is a region that has a gaseous pressure much lower than that of atmospheric pressure. A partial vacuum is a vacuum with low amounts of matter enclosed. A total, perfect, or absolute vacuum has no matter enclosed. Sometimes this type of vacuum is referred to as "free space."

2024年8月23日 · How does vacuum technology benefit chemistry? Vacuum techniques enhance chemical processes such as distillation, synthesis, and sublimation. They improve efficiency and effectiveness in various chemical experiments and industrial processes.

2025年1月7日 · When discussing a vacuum in chemistry, it is crucial to comprehend the following concepts: Absolute Vacuum: A perfect vacuum that contains no molecules or particles at all. Partial Vacuum: A space where the atmospheric pressure is reduced but not completely absent; it may still contain gas molecules. The Importance of Vacuums in Chemistry