Niswel wie oowing questions. Why is hydrogen gas collected by downward displacement of water?
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What are transitions between a liquid and gas called? identify which way they are transitioning

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?

How is the use of hydroelectric power related to the sun