# All Questions

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### How to compare the bond angle of ozone and nitrite anion [closed]

How do I compare the bond angle between $\ce{O_3}$ and $\ce{NO_2^-}$ ? I've studied how to compare the bond angle when normal covalent bonds are present where the electrons are shared in the bond and ...
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### What's the purpose of significant figures in measurements?

I have read about this topic in both of my chemistry and physics books, but none of them exactly pointed out the significance of the significant figures. Then I searched the Internet for the same and ...
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### Does folic acid contain a benzyl or a phenyl group?

I'm studying for my MCAT currently and I stumbled upon this question. It gives the structure of a folic acid molecule and asks what functional groups can be found within the molecule. I understand ...
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### Do superoxide salts of heavier alkali metals contradict the principle that lattice energy depends inversely on cation-anion distance?

I have a very basic understanding of quantitative lattice energy calculations: I only know that the lattice energy is directly proportional to the product of charges on the ions and inversely ...
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### Electron configuration of the Superactinoids (Z > 118) [duplicate]

I have a question: Do I see it correctly that the electron configuration of the superactinoids given in wikipedia was somehow calculated differently (quantum mechanically?); e.g. Z=119: [Og] 8s1 Z=...
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### Is it possible to filter Stille catalysts using syringe filter?

I'm conducting an organic synthesis involving Stille coupling. Stille coupling uses $\ce{Pd2(dba)3}$ and $\ce{P(o-tol)3}$ as catalysts. Both catalysts dissolves in toluene which is the solvent of my ...
57 views

### What is the solubility trend of alkaline earth metal fluorides?

I was going through JD Lee and I found certain contradictory statements. First: With most compounds, on descending the group, the hydration energy decreases more rapidly than the lattice energy: ...
38 views

### How do I label stereogenic centers R or S when there are 3 bonds in the plane and 1 bond coming out?

I need help with question (d). I labeled the O the first priority, then the C that's bonded to an O the 2nd, and the C above that is attached to 3 other C's the 3rd priority. So, I ended up getting S, ...
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### d orbital irreducible representations in metal in ML4 model [closed]

In ML4 (Metal—4 ligands)model which has a square planar shape and D4h point group, what is the irreducible representation for the 5 kinds of d orbitals in the central metal?
49 views