What is the pressure of an 8.5 L cylinder filled with 23.5 g of Nitrogen gas at a temperature of 298 K? Zinc reacts with hydrochloric acid to produce hydrogen gas. The mass of zinc was 0.125 g and the barometric pressure 758 mm Hg, the temperature was 20 C. Assumming all the zinc reacted, find the volume of gas (H2) collected.              Zn(s) + 2HCl (aq) = ZnCl2 (aq) + H2 (g)

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Q: In a laboratory, oxygen gas was collected by the water displacement method at atmospheric pressure…

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Q: .What is the temperature of gas, in K, that is expanded from 2.5 L at 25 C to 4.0 L at constant…

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Q: the number of grams of H2

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Q: what pressure would 10.0 g of oxygen gas exert in a 2.5 L container at 25 degrees celsius?

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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.