In a laboratory where gases are being collected, the atmospheric pressure is 753.5 mm Hg, and the temperature of the water being used is 20 °C. A sample of hydrogen gas is collected in a bottle from a chemical reaction (as described in the text and notes). What is the pressure of the collected hydrogen gas in the bottle?

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.