CHEMISTRY COMMUNITY

Jose Lupian 1C

How do we distinguish whether a compound is amphoteric or amphiprotic?

Jose Lupian 1C

HF(aq) is a weaker acid than HI(aq) because HF(aq) has a stronger bond than HI(aq). Remeber that the stronger the acid, the more easily the acid will give off protons. Since HI(aq) has weaker bonds than HF(aq), HI(aq) is the stronger acid.

Jose Lupian 1C

Are there any differences between oxoacids and strong acids in the way that they behave?

Jose Lupian 1C

I know that pi bonds don't allow atoms to rotate but I didn't understand the reason why. Could someone please explain?

Jose Lupian 1C

Are we expected to know specific functions for different transition metals on the final? For example, chromium assists insulin in controlling blood sugar levels.

Jose Lupian 1C

You can determine whether molecules are polar or nonpolar by looking at the dipole moments of bonds. If the direction of the dipole moments cancel out, then the molecule would be nonpolar. On the other hand, if they don't cancel out, then the molecule is polar.

Jose Lupian 1C

Are there any other shapes that we should take into consideration that Professor Lavelle hasn't covered yet?

Jose Lupian 1C

You would determine whether two species are a conjugate acid-base pair by determining the number of H+'s that differentiate both species. Two species are considered a conjugate acid-base pair if they are related to each other by one H+. For example, HF and F- would be considered a conjugate acid-bas...

Jose Lupian 1C

I think that you would put all the remaining electrons into the central atom as long as the octets of the surrounding atoms are full.

Jose Lupian 1C

What different procedure do we take when trying to figure out the formal charge of a charged molecule compared to one with no charge?

Jose Lupian 1C

You determine whether an atom is delta positive or delta negative by comparing electronegativities. For example, if carbon and oxygen were bonded together, oxygen will have the delta negative sign assigned to it since it has a higher electronegativity than carbon. And carbon would be assigned the de...

Jose Lupian 1C

Are we expected to know the names of different ionic compounds and are we always given the charge of transition metals when figuring out ionic compounds?

Jose Lupian 1C

If we are asked to write the Lewis Structure of Benzine on an exam, are we allowed to draw the diamond/circle symbol of benzene?

Jose Lupian 1C

I think we are only required to write one structure and not all of the resonance structures unless we are told to do so.

Jose Lupian 1C

Are there any elements in the periodic table that are exceptions to the formal charge equation or does the equation apply to all the elements?

Jose Lupian 1C

I know that the quantum number "ms" stands for the electronic spin, which is ±1/2. I just wanted to know what specific examples this concept would be applied towards because I don't think we have covered an example dealing with the "ms" quantum number.

Jose Lupian 1C

I believe that the exceptions to electron configuration involve only moving one electron into the S orbital in order to make the d orbital stable. This is done when the d orbital is half full or full. In your example, Vanadium requires two electrons to be moved and not one.

Jose Lupian 1C

This is because electrons at any given moment aren't in an exact position and direction of movement simultaneously.

Jose Lupian 1C

I was wondering what distinguishes s, p, d, and f orbitals from each other. Is it their energy levels or something else?

Jose Lupian 1C

I believe that the only way is by measuring the distance between the nuclei of two touching atoms of the same element. Then you would have to divide the distance by two in order to get the radius of that element's atom.

Jose Lupian 1C

(a) 4p
(b) 4s
(c) 6s
(d) 6s

Jose Lupian 1C

This past lecture Professor Lavelle showed an example where he combined E=hv and c=ƛv. This lead to the equation E=hc/ƛ. How did this combination result in this final equation?

Jose Lupian 1C

I believe that DET stands for a detector, which detects the number of electrons that come off the metal as it is hit by a beam of light.

Jose Lupian 1C

Do I need to show step-by-step calculations on either the homework or tests to show how I got my answer?

Jose Lupian 1C

Both 1/s and s^-1 mean the same thing. For example, 1/x and x^-1 are the same. I guess that this is just preference.

Jose Lupian 1C

In order to convert Fahrenheit to Kelvin, you first must convert the degrees in Fahrenheit into Celsius (5/9(°F-32)). After this conversion, all that needs to be done is to add 273 to your °C in order to get Kelvin.

Jose Lupian 1C

I think it is best if you kept the formula that you were given the same. In this example, the empirical and molecular formula are the same since molecular formula can't be reduced any further.

CHEMISTRY COMMUNITY

Search found 27 matches

Amphoteric and amphiprotic

Re: Question about HF (aq)

Oxoacids

Pi bonds

Biological Function on Final?

Re: polar and nonpolar molecules

Any Other Shapes?

Re: Conjugate acid-base pair

Re: expanded octets

Charged Molecule

Re: delta positive and delta negative

Test 3 [ENDORSED]

Benzine

Re: resonance structures on exams

Fornal Charge Exceptions?

"ms" Quantum Number [ENDORSED]

Re: Why isn't Vanadium an exception?

Re: Concept

Difference between orbitals

Re: Atomic Radius

Re: Question 2.47

Combining E=hv and c=ƛv [ENDORSED]

Re: Photoelectric Effect Diagram [ENDORSED]

Showing Work

Re: Frequency 1/s or s^-1 [ENDORSED]

Re: conversion from Fahrenheit to kelvin

Re: Molecular to Empirical