CHEMISTRY COMMUNITY

Karina Vasquez 1D

A way I determine a higher boiling point is by figuring out if there is a hydrogen bond in the molecule because hydrogen bonds tend to have higher boiling points.

Karina Vasquez 1D

In the question below it asks to write the name and to name the shape, what would be an easy way to figure out the shape of this compound?
Write the name of the coordination compound Na3 [Co(C2O4)3] , and name the shape of this coordination compound.

Karina Vasquez 1D

When naming a coordination compound such as K3Fe(CN)6 how would I know which is the cation and which is the anion?

Karina Vasquez 1D

What does it mean when a question asks to rank in order of increasing HCH bond angles?

Karina Vasquez 1D

When ranking say anions from least to greatest polarizability how does the charge determine where it would be placed when ranked? For example, ranking I-, Cl-, S2-, P3- how does the charge determine which of S2- and P3- will be ranked first (least to most polarizable)?

Karina Vasquez 1D

4.111 Acetonitrile, CH3CN, is used as a solvent in the pharmaceutical industry. Describe the structure of the CH3CN molecule in terms of hybrid orbitals, bond angles, and sigma and pi bonds. The N atom is a terminal atom. How would I describe the structure in terms of using sigma and pi bonds? Would...

Karina Vasquez 1D

J.19 The oxides of nonmetallic elements are called acidic oxides because they form acidic solutions in water. Write the balanced chemical equations for the reaction of 1 mol of formula units of each acidic oxide with 1 mol of water molecules to form an oxoacid and name the acid formed: (a) CO2; (b) ...

Karina Vasquez 1D

Here are the final material that will be tested: Chemical Bonds Molecular Shape and Structure Coordination Compounds and their Biological Importance Acid and Base Structures and Properties In the topic of Coordination Compounds and their Biological Importance we have to know how to name certain com...

Karina Vasquez 1D

17.29 Name each of the following complex ions and determine the oxidation number of the metal: (a) [Fe(CN)6]^4-; (b) [Co(NH3)6]^3+; (c) [Co(CN)5(OH2)]^-2; (d) [Co(SO4)(NH3)5]^+.

Can someone explain how to solve this problem step-by-step?

Karina Vasquez 1D

205458163 wrote:You can calculate the oxidation state of a certain atom by using the sum of all positive and negative equal to 0.

What do you mean by using the "sum of all positive and negative equal to 0"?

Karina Vasquez 1D

Ok thank you for explaining!!!

Karina Vasquez 1D

Is there a way to memorize the forces in intermolecular and intramolecular forces? Ex: hydrogen and/or vander waal interactions.

Karina Vasquez 1D

Ok thank you!
Also I don't really understand how to apply the formal charge or partial charge. What is the difference?

Karina Vasquez 1D

Can fluorine, chlorine, or any atom in group 17 ever be the central atom? Is it just fluorine that can't be a central atom?

Karina Vasquez 1D

When a question asks to find the complete lewis structure, does that mean finding the formal charge as well?
For example in the 6th edition of the book question 3.39 says to write the complete Lewis structure for the following compound (a) ammonium chloride. Do I look for the formal charge as well?

Karina Vasquez 1D

Will we need to know how to figure out the resonance hybrid for lewis structures?

Karina Vasquez 1D

When drawing the lewis structure for an ion, for example CN^-, after we are finished adding the other electron do we put the the lewis structure in brackets to represent the number of electrons added? In this case it would be one?

Karina Vasquez 1D

Can someone explain the concept of certain elements being able to break the octet rule?

Karina Vasquez 1D

Elements in the d block are transition metals, so they normally express valence electron from the s orbital. For example, Fe has 2 valence electrons because the electron configuration is 1s^2 2s^2 2p6 3s2 3p^6 4s^2 3d^5. Notice that both ns^2 have 2 electrons so we have 2 valence electrons. Another...

Karina Vasquez 1D

Ok thank you! Also, should we know/memorize the exceptions of ionic charges for transitional metals?

Karina Vasquez 1D

Which M^2+ ions (where M is a metal) are predicted to have the following ground-state electron configurations: (a) [Ar]3d7; (b) [Ar]3d6 I don't understand how to begin finding M because are the 2+ electrons lost already or do we apply it to the following? Assuming its the latter would I take from 4s...

Karina Vasquez 1D

Are the only special cases when completing ground state electron configuration Cu and Cr or is it all of the first row of transition metals?

Karina Vasquez 1D

Will we need to and should we use rydberg's equations for the midterm? Is there a possibility that we will need to use this equation to solve for a problem?

Karina Vasquez 1D

From what I know molar mass and atomic weight are numerically equivalent, although they have different units. So the unit for atomic weight is amu and molar mass would be in g/mol. Hope that helped!

Karina Vasquez 1D

2.19 (a) How many values of the quantum number l are possible when n=7? (b) How many values of ml are allowed for an electron in a 6d-subshell? (c) How many values of ml are allowed for an electron in a 3p-subshell? (d) How many subshells are there in the shell with n =4? Can someone explain step-by...

Karina Vasquez 1D

Ok, thank you!

Karina Vasquez 1D

When answering a question about the wavelength (ex: maximum) in a photoelectric problem, would the answer be in m or nm? Should I have both?

Karina Vasquez 1D

Thank you so much!

Karina Vasquez 1D

Just to clarify, when the experimental results were gathered they found that the intensity of light is proportional to the number of photons , BUT when talking about light as a wave then the intensity of the wave is associated with the amplitude of the wave which would not be correct? So intensity o...

Karina Vasquez 1D

Is there a particular way to find the reactants? Can you write the steps (break them down) to find the limiting reactant please.

Karina Vasquez 1D

What if the substances were different? Would you only add the moles from a particular substance that is asked for?

Karina Vasquez 1D

How would you go about finding the amplitude?

Karina Vasquez 1D

I know this doesn't really have to do with the question, but how do you find the threshold energy, or would it always be given? In a vague way? So for example, in the second question from the lecture I'm assuming the threshold is 3.61 x 10^-19 J. Is that going to be the threshold unless it explicitl...

Karina Vasquez 1D

A compound consists only of Carbon, Hydrogen, and Oxygen. 8.272 g of CO2 and 4.515 g of H2O are produced during complete combustion of 3.765g of the compound. a) What is the empirical formula of the compound? b) What is the molecular formula if the molar mass of the compound is 300. 47 g/mol? I know...

Karina Vasquez 1D

One thing I do a few days prior to taking an exam is make a list of what I know and don't know, that way I can be sure not to miss anything. Using the worksheets provided by the UA's, modules, and fundamentals section is what I use to study. What really helps me is watching videos that really breakd...

CHEMISTRY COMMUNITY

Search found 35 matches

Re: Boiling Point

Shape in coordination compound

Cation/Anion

Increasing bond angles

Ranking anions/cations

6th edition ch. 4

J. 19 6th edition

Re: topic

Coordination Compound 6th edition

Re: Oxidation states

Re: Complete Lewis Structure [ENDORSED]

Re: Inter and Intra

Re: Complete Lewis Structure [ENDORSED]

Central Atom

Complete Lewis Structure [ENDORSED]

Resonance Hybrid

Lewis Structures for Ions

Expanded octet

Re: Valence electrons

Re: Electron Configuration for 1st row transition metals

6th edition chapter 3 problem 9

Electron Configuration for 1st row transition metals

Rydberg's equation for midterm

Re: Molar Mass vs. Atomic Weight

6th edition chapter 2 number 19

Re: Photoelectric effect answer

Photoelectric effect answer

Re: Main experimental results

Main experimental results

Re: How to distinguish limiting or excess reactant.

Re: Balancing Equations

Re: wavelength

Re: Frday's lecture

Combustion Analysis Problem

Re: Test Studying Strategies