Tire pressure gauges are often calibrated in pounds per square inch. An automobile tire is inflated to a pressure of 31.8 psi. Express this pressure in atmospheres and in millimeters Hg. Hint: 1 atm=760 mmHg=14.1 psi pressure=_____atm pressure=_____mmHg

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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.