(i) Define mole. How is it related to Avogadro’sconstant ?
(ii) Calculate the number of molecules in 56 grams of nitrogen gas. (Atomic mass of N=14u)
(iii) Write the names of elements present in the following compounds : (i) Slaked lime (ii) Hydrogen bromide
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The mole is the unit of measurement for amount of substance in the International System of Units. It is defined as exactly 6.02214076×10²³ particles, which may be atoms, molecules, ions, or electrons.
The Avogadro constant is the proportionality factor that relates the number of constituent particles in a sample with the amount of substance in that sample. Its SI unit is the reciprocal mole, and it is defined as NA = 6.02214076×1023 mol−1.
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