A sample of magnesium metal reacts completely with an excess of hydrocholoric acid: Mg(s) + 2 HCl(aq) --> MgCl₂(aq) + H₂(g) The hydrogen gas produced is collected over water at 28.0 °C. The volume of the gas is 52 L, and the total pressure in the gas collection vessel is 1.02 atm. Calculate the mass of magnesium metal that reacted in grams. (Vapor pressure of water at 28.0 °C 28.2 mmHg) Just give the number. The assumption is the value is in grams. =

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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.