A sample of oxygen is collected over water at 24°C and 757 mm Hg in a 125-mL flask. The vapor pressure of water at 24°C is 22.4 mm Hg. The partial pressure is 734.6 mmHg. There are 4.96x10^-3 moles of dry gas collected. If 0.0205g of N2(g) are added to the flask at the same temperature, the partial pressure of nitrogen in the flask is 108.7 mmHg. What is the total pressure in the flask after nitrogen is added?

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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.