A sample of helium gas occupies a volume of 6.45 L at 51.0°C and 0.550 atm. If it is desired to increase the volume of the gas sample to 7.69 L, while decreasing its pressure to 0.388 atm, the temperature of the gas sample at the new volume and pressure must be °C.

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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.