Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.a) Al > H2O due stronger dispersion forces in Al than in H2O.b) Xe > Ar because of the greater atomic mass and stronger dispersion forces of Xe.c) LiF > MgF2 due to lower atomic mass of Li+ than Mg2+.d) PbCl4 > PbO2 due to lower charge on Cl - than O2-.e) XeF4 > CF4 due dipole-dipole forces in XeF4 not present in CF4.

Melting point is a temperature at which solid substance convert to liquid. Factors affecting melting…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.

a) Al > H₂O due stronger dispersion forces in Al than in H₂O.

b) Xe > Ar because of the greater atomic mass and stronger dispersion forces of Xe.

c) LiF > MgF₂ due to lower atomic mass of Li⁺ than Mg²⁺.

d) PbCl₄ > PbO₂ due to lower charge on Cl^- than O^2-.

e) XeF₄ > CF₄ due dipole-dipole forces in XeF₄ not present in CF₄.

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