A sample of gas has a mass of 0.565  g g . Its volume is 115  mL mL at a temperature of 86  ∘C ∘C and a pressure of 755  Torr Torr . Find the molar mass of the gas.   Use the molar volume of a gas at STP to determine the volume (in LL) occupied by 19.8  g g of neon at STP.

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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.