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molar mass

Problems / Numericals based on Mole Concept (Atomic Mass/ Molar Mass/ Avogadro number)

17 Comments / Atom and molecule, Chemistry, Class IX / By

Formulas in brief –               Mass = Molar mass x Number of moles  Number of moles = Given number of particles / Avogadro number      Number of particles = (Given mass / molar mass) x Avogadro number          (from 1 and 2)  If one carbon atom has a mass of 12 atomic mass units and one magnesium atom has …

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What is Mole Concept? – Introduction, Importance and Formulae

10 Comments / Atom and molecule, Chemistry / By

Introduction  The structure of matter can be one of the following – atoms → molecules → bulk compound or element atoms → bulk element atoms → ions → bulk ionic compound It clearly shows that the masses that are measured in the laboratory are masses corresponding to large numbers of tiny atoms or molecules. Logically …

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