5. What is the density of carbon dioxide gas at 1.66 atm of pressure and 25.6°C? 6. If 24.6 mL of a 2.50 M hydrochloric acid solution reacts with 24.3 grams of sodium sulfide. What is the volume, in L, of the hydrogen sulfide gas released? The reaction occurs at 24.65 °C and 668.6 torr of pressure. 2 HCI (aq) + Na2S (aq) → H₂S (g) + 2 NaCl(aq) -

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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.