Calcium carbide reacts with water to produce acetylene gas according to the following equation: CaC₂ (s) + 2H₂O(1)→ C₂H₂(g) + Ca(OH)2 (aq) The product gas, C₂H₂, is collected over water at a temperature of 20 °C and a pressure of 755.0 mm Hg. If the wet C₂H₂ gas formed occupies a volume of 6.01 L, the number of moles of CaC₂ reacted was mol. The vapor pressure of water is 17.5 mm Hg at 20 °C.

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Q: CH₂

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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.