Engineering
Chemistry
Empirical Formula
Question

A compound MpXq has cubic close packing (ccp) arrangement of X. Its unit cell structure is shown below. The empirical formula of the compound is

 

M5X14

MX

M2X

MX2

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Solution

Face centre = × = 4

For M,

edge centre = 14×4=1

centre = 1

M2X4

i.e.        MX2

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