Question

Need help with numbers 9 to 14. Thanks!

Gold (Au) crystallizes in a cubic close-packed structure (the face-centered cubic unit cell) and has
a density of 19.3 g/cm3. State the coordination number of each atom and calculate the atomic
radius of each atom in picometers.
9.
10. Which of the following are molecular solids and which are covalent solids?
Ses
a.
b. HBr
C.
d. CO2
e. C
f.
Si
P406
g. SiH
(C2H5OH), glycerol (CHOH CH20H)2), and ethylene glycol (CH20H).
points). The density of Eu is 5.26 g/cm3. State the coordination number and calculate the unit cell
11. Rank the following molecules in terms of increasing viscosity and electronegativity: ethanol
12. Europium crystallizes in a body-centered cubic lattice (the Eu atoms occupy only the lattice
edge length in picometers.
13. Would naphthalene, CioHs, be more soluble in ethanol, C2HsOH, or in benzene, CsHs?
14. A face-centered cubic cell contains 8 X atoms at the corners of the cell and 6 Y atoms at the
faces. What is the empirical formula of the solid
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Transcribed Image Text:Gold (Au) crystallizes in a cubic close-packed structure (the face-centered cubic unit cell) and has a density of 19.3 g/cm3. State the coordination number of each atom and calculate the atomic radius of each atom in picometers. 9. 10. Which of the following are molecular solids and which are covalent solids? Ses a. b. HBr C. d. CO2 e. C f. Si P406 g. SiH (C2H5OH), glycerol (CHOH CH20H)2), and ethylene glycol (CH20H). points). The density of Eu is 5.26 g/cm3. State the coordination number and calculate the unit cell 11. Rank the following molecules in terms of increasing viscosity and electronegativity: ethanol 12. Europium crystallizes in a body-centered cubic lattice (the Eu atoms occupy only the lattice edge length in picometers. 13. Would naphthalene, CioHs, be more soluble in ethanol, C2HsOH, or in benzene, CsHs? 14. A face-centered cubic cell contains 8 X atoms at the corners of the cell and 6 Y atoms at the faces. What is the empirical formula of the solid
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