NEET Chemistry The Solid State Questions Solved

BOARD

An element with density 11.2 g cm-3 forms a f.c.c. lattice with edge length of 4×10-8 cm. Calculate the atomic mass of the element.

(Given : NA = 6.022×1023 mol-1)

Given : ρ = 11.2 g cm-3,    a = 4×10-8 cm

For fcc lattice, Z = 4

Using formula, M = ρ×a3×NAZ

M = (11.2)(4×10-8)3(6.022×1023)4

=4316.56×10-14

= 107.91 g/mol-1

Difficulty Level:

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