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Problem 35 Easy Difficulty

Classify each of the following molecules as polar or nonpolar. You may wish to review the chapter on chemical bonding.
(a) $\mathrm{SiH}_{4}$
(b) $\mathrm{Si}_{2} \mathrm{H}_{6}$
(c) $\mathrm{SiCl}_{3} \mathrm{H}$
(d) $\mathrm{SiCl}_{4}$
(e) $\mathrm{SiCl}_{2} \mathrm{F}_{2}$

Answer

a. since $\mathrm{SiH}_{4}$ is a covalent compound, in which silicon and hydrogen have similar electronegativities, $\mathrm{SiH}_{4}$ is a non-polar covalent compound. Dipole moment of this molecule is 0 .
b. since $\mathrm{Si}_{2} \mathrm{H}_{6}$ is a covalent compound, in which silicon and hydrogen have similar electronegativities, $\mathrm{Si}_{2} \mathrm{H}_{6}$ is a non-polar compound. Dipole moment of this molecule is 0 .
c. since $\mathrm{SiCl}_{3} \mathrm{H}$ is a covalent compound, in which the electronegativity of chlorine is much more than silicon and hydrogen, $\mathrm{SiCl}_{3} \mathrm{H}$ is a polar covalent compound.
d. SiF $_{4}$ is a polar covalent compound.
e. $\mathrm{SiCl}_{2} \mathrm{F}_{2}$ is a polar covalent compound.

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Chemistry 101
Chemistry

Chapter 18

Representative Metals, Metalloids, and Nonmetals

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Nonmetals Chemistry

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Video Transcript

for auction. E silicon and hydrogen have similar electro negativity. So the DYP old movement of this molecule with zero for option B silicon a hydrogen again half silly, similar electro negativity. Sze and s. I too, at six is non bullock overland molecule. So the die poor movement again. Zero option c The compound has called. It is a cool and calm bone in which Elektra negativity off chlorine is higher than that off silicon and hydrogen. It is a poor local will and component for Option D s. I. F four is a coagulant compound in which Elektra negativity off Lauren is higher than that off silicon. So over our diaper moment comes out to be zero. Since individual die polled movement that the four cancel out each other, it is a polo coagulant compound for Option E. It is a corpulent compound in which the electro negativity off Lauren is the greatest. Chlorine is next. Most electoral negative. Silicon is the least Electra negative. Therefore, it is a poor local and come back

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