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3 days ago in Economics (Other Fields Homework Help) by Anonymous
Help! The answer is missing an explanation...
Best Answer • 3 days ago in Chemistry (Science-Related Homework Help) by shichihenge7
4.09 g/cm3

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure. The edge length of this cubic unit cell is 540.9 pm. Determine the density of zincblende.



▸ 0.244 g/cm3

▸ 1.02 g/cm3

▸ 2.05 g/cm3

▸ 4.09 g/cm3

▸ 8.18 g/cm3
Best Answer • 3 days ago in Chemistry (Science-Related Homework Help) by overlandtrail
109 mmHg

The vapor pressure of ethanol is 400. mmHg at 63.5°C. Its molar heat of vaporization is 39.3 kJ/mol. What is the  vapor pressure of ethanol, in mmHg, at 34.9°C? (R = 8.314 J/K • mol)



▸ 109 mmHg

▸ 220 mmHg

▸ 366 mmHg

▸ 376 mmHg

▸ 1470 mmHg
Best Answer • 3 days ago in Chemistry (Science-Related Homework Help) by scmhack
cannot have a vapor pressure less than 91 torr.

The triple point of iodine is at 0.12 atm and 115°C. Thus, liquid I2

is more dense than I2(s).



▸ cannot exist above 115°C.

▸ is liquid at room temperature.

▸ cannot have a vapor pressure less than 91 torr.

▸ sublimes at high pressure.
Best Answer • 3 days ago in Chemistry (Science-Related Homework Help) by lpants
4.

The number of atoms in a face-centered cubic unit cell is

▸ 1.

▸ 2.

▸ 3.

▸ 4.

▸ 8.
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