Its working now.

oh okay here https://www.chemtopperquiz.com/mod/quiz/startattempt.php?cmid=11042&sesskey=Td4LdpaZTv

ohh okay thank you, i understand this now. Thanks!

Please post the link as there is no image in the attached file.

Chromium and molybdenum prefer half-filled d-orbitals due to the extra stability from exchange energy and electron correlation effects:

Actual Cr Configuration: Ar 4s¹ 3d⁵
Actual Mo Configuration: Kr 5s¹ 4d⁵
This happens because promoting one s-electron to the d-orbital results in a half-filled, more stable d⁵ configuration, lowering the overall energy.
However in case of W which is heavy element and also have f orbitals as inner shell, screening effect becomes very  poor and 6s orbitals become more stable .So it prefers to have more electron in 6s and hence more low energy for 6s then 5d.

4.40 kPa = 4.40 *1000 Pa
use this conversion and R value also in SI units = 8.314 J/mol.K

Just wondering when we conver to pascals we get two different answers, so is it that we need to use pascals or can we just use the Kpa given. Also which R value do we have to use for this problem, like do we use 0.0821 or 8.314

For Q1 use the Clausius-Clapeyron equation

Convert Temp in K
P is pascal (SI unit) and value of C is given. Use it and calculate heats of vaporization .Answer will be J/mol

The source of error is the loss of vapors to the surroundings and results in low vapor pressure.
This results in low value of Heats of vaporization from actual value.

Hi,

We recently did a lab and I don't understand how to answer these questions (screenshot), as the lab doesn't make much sense to me, is it possible if I could get a description on how to get the answer and what to write for the second and third questions in that sheet. (screenshot)
I have a quiz on this tomorrow and need to be able to know how to do this, thank you!

Thank you,
Joshitha VLab Directions_ Hvap of Ethanol.pdf 

Hi, this quiz wasn't working for me. Could u check it? Thanks