Which of the following statements concerning a face- centered cubic unit cell an

Question

Which of the following statements concerning a face- centered cubic unit cell and the corresponding lattice, made up of identical atoms, is incorrect? If the atoms have radius r, then the length of the cube edge is V8 times f. The close-packed direction lies along the face diagonal of the unit cell. The coordination number of the atoms in the lattice is 8. There are four atoms per unit cell in this type of packing. All statements are correct. The strongest intermolecular interactions between hydrogen sulfide (H_zS) molecules arise from ______ dipole-dipole forces disulfide linkages hydrogen bonding ionic bonds E. London dispersion forces In the following phase diagram, as one goes from point C to D there is an increase in temperature ______________ beyond the critical point with a phase change from liquid to vapor with a phase change from solid to liquid with a phase change from solid to vapor with no phase change

Explanation / Answer

19-E, all the statement are correct,

20-A, because of sulphur and hydrogen electro negative differences are more so that it generate dipole moment

21-C,

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