A sample of oxygen produced in a laboratory experiment had a volume of 493 mL at a pressure of 575 mmHg and a temperature of 89.0oC. What is the pressure of this sample at 25.0oC and a volume of 535mL?    2.  If 0.363 mol of O2 gas has a volume of 675mL and a pressure of 755 mmHg, what is its temperature?    3.  A tank contains oxygen gas at 590 torr, nitrogen gas at 0.65 atm, and argon gas at 620 mmHg. What is the total pressure in atm?

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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.