6) Consider the combustion reaction of hydrogen (assuming no changing pressure and temperature): 2H2(g) +O2(g) -> 2H2O(g) What volume of steam is formed from 50cm3 of hydrogen and 50cm3 of oxygen mixed together. What gas(s) is in excess and by how much?

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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.