Chapter 9: Problem 52
Vanadium crystallizes with a body-centered cubic unit cell. The volume of the unit cell is \(0.0278 \mathrm{~nm}^{3}\). What is its atomic radius?
Chapter 9: Problem 52
Vanadium crystallizes with a body-centered cubic unit cell. The volume of the unit cell is \(0.0278 \mathrm{~nm}^{3}\). What is its atomic radius?
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Get started for freeExplain in terms of forces between structural units why (a) \(\mathrm{Br}_{2}\) has a lower melting point than \(\mathrm{NaBr}\). (b) \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\) has a higher boiling point than butane, \(\mathrm{C}_{4} \mathrm{H}_{10}\). (c) \(\mathrm{H}_{2} \mathrm{O}\) has a higher boiling point than \(\mathrm{H}_{2} \mathrm{Te}\). (d) Acetic acid \(\mathrm{CH}_{3}-\mathrm{C}-\mathrm{OH}\) has a lower boiling point
An experiment is performed to determine the vapor pressure of formic acid. A 30.0-L volume of helium gas at \(20.0^{\circ} \mathrm{C}\) is passed through \(10.00 \mathrm{~g}\) of liquid formic acid \((\mathrm{HCOOH})\) at \(20.0^{\circ} \mathrm{C}\). After the experiment, \(7.50 \mathrm{~g}\) of liquid formic acid remains. Assume that the helium gas becomes saturated with formic acid vapor and the total gas volume and temperature remain constant. What is the vapor pressure of formic acid at \(20.0^{\circ} \mathrm{C} ?\)
Arrange the following in order of increasing boiling point. (a) Ar (b) He (c) Ne (d) Xe
What are the strongest attractive forces that must be overcome to (a) melt ice? (b) sublime bromine? (c) boil chloroform (CHCl \(_{3}\) )? (d) vaporize benzene \(\left(\mathrm{C}_{6} \mathrm{H}_{6}\right)\) ?
The vapor pressure of bromine, \(\mathrm{Br}_{2}(l)\) at \(25^{\circ} \mathrm{C}\) is \(228 \mathrm{~mm} \mathrm{Hg}\). (a) How many grams of bromine will be present as a gas if liquid bromine is poured into an evacuated 2.00-L flask at \(25^{\circ} \mathrm{C} ?\) (b) If \(2.00 \mathrm{~g}\) of bromine is used, what is the final pressure in the flask? Will there be liquid in the flask? (c) If \(2.00 \mathrm{~g}\) of bromine is put into an evacuated \(750.0\) -mL flask at \(25^{\circ} \mathrm{C}\), what is the final pressure in the flask? Will there be any liquid in the flask?
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