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A solid having density of

9 x 103  kg m-3  forms face centred cubic crystals of edge length  200 √2  pm. What is the molar mass of of the solid

a. 0.0432 kg mol -1

b. 0.0305 kg mol -1

c. 0.4320 kg mol-1

d. 0. 0216 kg mol -1

Ans. b

(29)

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