A sample of hydrogen gas is collected over water. If the àqueous vapor pressure at 25° C is 29.8 mm Hg. What is the pressure of dry hydrogen at the same temperature? The atmospheric pressure at lab conditions is 855 mm Hg. O A. 760 mm Hg O B. 115.3 mm Hg O C. 825 mm Hg O D. 55.7 mm Hg
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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