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la). Vanadium crystallizes in a body-centered cubic lattice (the V atoms occupy only the lattice points). How many V atoms are present in a unit cell? AND 1b) Gold (Au) crystallizes in a cubic close-packed structure (face centered cubic unit cell). The unit cell edge length is 144 pm. What is the density of the gold crystal? 2.) In an experiment to determine the molar mass of dichlorobenzene CHClausing freoring point d

la). Vanadium crystallizes in a body-centered cubic lattice (the V atoms occupy only the lattice points). How many V atoms are present in a unit cell? AND 1b) Gold (Au) crystallizes in a cubic close-packed structure (face centered cubic unit cell). The unit cell edge length is 144 pm. What is the density of the gold crystal? 2.) In an experiment to determine the molar mass of dichlorobenzene CHClausing freoring point d

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter9: Liquids, Solids, And Materials
Section: Chapter Questions
Problem 121QRT
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I need help with 1& 2 please I need to. Understand those problems thank you
la). Vanadium crystallizes in a body-centered cubic lattice (the V atoms occupy only the lattice points). How many V atoms are present in a unit cell? AND 1b) Gold (Au) crystallizes in a cubic close-packed structure (face centered cubic unit cell). The unit cell edge length is 144 pm. What is the density of the gold crystal? 2.) In an experiment to determine the molar mass of dichlorobenzene C6H4Cl2 using freezing point depression of solvent cyclohexane, a student uses 10 mL or cyclohexane (density 0.779 g/ml) and obtains an average freezing point of 5.75 degrees Celsius. She graphically determines the new freezing point to be 2.8 degrees Celsius by setting equation of 2 lines equal to each other. What is her DT? If she uses a total of 0.2301 grams of dichlorobenzene what is her calculated molecular weight for the solute? What is % error from actual molecular weight of solute? Is this a reasonable result? 3.) Calculate the molality of the following aqueous solutions: a) 5.20 M NaCl solution (density of solution = 1.32 g/mL). (b) 0.78 M NaOH solution (density of solution = 1.14 g/mL). () 2.51 M NeUCO
Transcribed Image Text:la). Vanadium crystallizes in a body-centered cubic lattice (the V atoms occupy only the lattice points). How many V atoms are present in a unit cell? AND 1b) Gold (Au) crystallizes in a cubic close-packed structure (face centered cubic unit cell). The unit cell edge length is 144 pm. What is the density of the gold crystal? 2.) In an experiment to determine the molar mass of dichlorobenzene C6H4Cl2 using freezing point depression of solvent cyclohexane, a student uses 10 mL or cyclohexane (density 0.779 g/ml) and obtains an average freezing point of 5.75 degrees Celsius. She graphically determines the new freezing point to be 2.8 degrees Celsius by setting equation of 2 lines equal to each other. What is her DT? If she uses a total of 0.2301 grams of dichlorobenzene what is her calculated molecular weight for the solute? What is % error from actual molecular weight of solute? Is this a reasonable result? 3.) Calculate the molality of the following aqueous solutions: a) 5.20 M NaCl solution (density of solution = 1.32 g/mL). (b) 0.78 M NaOH solution (density of solution = 1.14 g/mL). () 2.51 M NeUCO
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