Question

Explain how you will calculate the number of particles, and number of unit cells in x g of metal.​

Answer 1

∴ Molar mass, M, contains NA particles. ∴ x g of metal contains x N A M particles. Number of unit cells in x g of metallic crystal: ... ∴ x n ρ a 3 particles correspond to x n ρ a 3 × 1 n unit cells.

Answer 2

We have to explain how we will calculate the number of particles and the number of unit cells in x g of metal.

solution : number of particles :

given mass of metal = x g

let atomic mass of metal is M.

then no of moles of metal = x/M

no of atoms/particles of metal = no of moles of metal × Avogadro's number

= x/M × Na

= x × Na/M

number of unit cells :

let number of atoms per unit cell is Z

then no of unit cells in x g of metal = number of particles/Z

= x × Na/(M × Z)

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