A gas mixture with a total pressure of 2300 torr is used by a scuba diver. If the mixture contains 2.5 moles of helium and 5.0 moles of oxygen, what is the partial pressure, in torr, of each gas in the sample? Express your answer in torr to two significant figures. PHe = _____ PO2 _____

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A: Vol of K2Cr2O7: 100 mLVol of FAS titrant: 15.2 mLMolar mass of FAS: 284.1 g/molMass of FAS: 24.135 g

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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.