Exam (elaborations)
Chem 231 Questions And Answers Latest Update
- Course
- CHEM 231
- Institution
- University Of Illinois - Urbana-Champaign
Chem 231 Questions And Answers Latest Update
[Show more]
Content preview
Solution 2024/2025Pepper
Chem 231 Questions And Answers Latest
Update
When are the prefixes mono-, di-, tri-, etc. used to name a compound?
ANS✔✔ Only when naming covalent compounds
When are roman numerals used to name a compound? ANS✔✔ Only when
naming ionic compounds containing transition and post-transition metals
Consider a compound containing 3 carbon atoms per molecule. The molar
mass of the compound is 167.9 g/mol. What is the mass percent C? ANS✔✔
21.5
When drawing the Lewis representation of a single fluorine (F) atom, how
many dots would be drawn? ANS✔✔ 7
Which of the following (there may be more than one correct answer) follow
the octet rule? ANS✔✔ N, C, O, F
Which of the following have the electron configuration 1s22s22p63s23p6
(mark all that apply)? ANS✔✔ S2−
Cl−
P3−
Order the following from smallest atomic radius to largest (1 = smallest; 5 =
largest). ANS✔✔ F<N<Li<Br<Se
, Solution 2024/2025
Pepper
Which of the following atoms are diamagnetic (mark all that apply)? ANS✔✔
Be, Ne, Cd
Effective nuclear charge reflects the fact that... ANS✔✔ core electrons shield
the valence electrons from some of the positive charge of the nucleus.
Which of the following statements correctly explains why oxygen's first
ionization energy is smaller than nitrogens? ANS✔✔ because two of
oxygen's four 2p electrons are paired, causing electron repulsion, making it
easier than expected to pull off the first electron
If you measure out 1,686.1 g of PbCl2, how many moles of the substance do
you have? ANS✔✔ 6.063
A photon hits a detector of an air quality sensor. If the energy of a photon is
8.50 x 10-19 J, what is the wavelength of the photon, in nanometers?
ANS✔✔ ((6.63*10^-34)(3*10^8))/(8.50*10^-19) = 2.34*10^-7
> (2.34*10^-7) / (10^-9) = 234
= 234 nm
What's the maximum amount of electrons in an atom that could have n=4
and l=2? ANS✔✔ 10
The following successive ionization energies belong to a fictitious element.
How many valence electrons does this element have? ANS✔✔ [ Basically
where you see the biggest jump in kJ/mol is how many valence electron the
element has.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
84866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now