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MOLE CONCEPT 1. MEASUREMENT IN CHEMISTRY 1.1 Every measured physical quantity consists of two parts viz a numerical value and the unit. Physical quantity = numerical value  unit 1.2 The numerical value of a physical quantity is determined experimentally. Every scientific measurement has some degree of uncertainty due to two reasons. (i) Skill of the observer (ii) Limitation of measuring instrument 1.3 There are two ways of expressing this uncertainty. (i) One method of expressing it is to u

Author

Raju Singh

Language

EN