An old gas canister was found in the back of a school laboratory. When a U-tube manometer containing Hg (r = 13.69 g/mL) was connected to read the pressure in the canister, the Hg displaced 110 mm towards the canister. What is the pressure inside the canister (in mmHg) if atmospheric pressure is 1.01 atm? (1 atm = 760 mmHg = 101325 Pa)

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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.