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Chapter 10: Q5E (page 583)
What is the evidence that all neutral atoms and molecules exert attractive forces on each other?
The attractive force between neutral atoms and molecules is evidence that they all exert attractive force.
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Ethyl chloride is used as a local anesthetic. When the liquid is sprayed on the skin, it cools the skin enough to freeze and numb it. Explain the cooling effect of liquid ethyl chloride.
Platinum (atomic radius \( = 1.38{A^o}\) ) crystallizes in a cubic closely packed structure. Calculate the edge length of the face-centered cubic unit cell and the density of platinum.
Describe the crystal structure of Pt, which crystallizes with four equivalent metal atoms in a cubic unit cell
Identify the type of crystalline solid (metallic, network covalent, ionic, or molecular) formed by each of the following substances:
\(\begin{aligned}{\rm{(a)Si}}{{\rm{O}}_{\rm{2}}}\\{\rm{(b)KCl}}\\{\rm{(c)Cu}}\\{\rm{(d)C}}{{\rm{O}}_{\rm{2}}}\\{\rm{(e)C(diamond)}}\\{\rm{(f)BaS}}{{\rm{O}}_{\rm{4}}}\\{\rm{(g)N}}{{\rm{H}}_{\rm{3}}}\\{\rm{(h)N}}{{\rm{H}}_{\rm{4}}}{\rm{\;F}}\\{\rm{(i)}}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}\end{aligned}\)
On the basis of intermolecular attractions, explain the differences in the boiling points of n-butane \(\left( { - 1 ^\circ C} \right)\) and chloroethane \(\left( {12 ^\circ C} \right),\)which have similar molar masses.
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