CHEMISTRY COMMUNITY

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It is for indication the number of atoms or ions.

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Polydentate ligands range in the number of atoms used to bond to a central metal atom or ion. EDTA, a hexadentate ligand, is an example of a polydentate ligand that has six donor atoms with electron pairs that can be used to bond to a central metal atom or ion.

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Means it is exciting.

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

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Lewis acid is an electron acceptor, Lewis base is an electron donor

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There isn't a certain reason for this. You just have to memorize it.

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Hydrogen bonging is a special form of dipole-dipole bonding, which is the strongest.

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Radicals are molecules that have an odd number of electrons. They are very unstable and they can only exist for a relatively short time period.

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I think most of the time we will be given the formulas.

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I think you don't have to know about how to draw resonance hybrid for Lewis Structure. The only thing we have to know is some molecules have several forms of their Lewis Structure, but all of them are equivalent.

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In my opinion, you don't have to find and write the formal charge. The reason is the formal charge is a tool to help you find which structure is more stable, you don't have to draw it on Lewis structure.

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You can draw it in several different ways. Just count the number of electrons, and try to make each atom form eight electrons out most shell.

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You can draw it in several different ways. Just count the number of electrons, and try to make each atom form eight electrons out most shell.

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In my opinion, the answer is yes, you should draw a figure of the structure. And you also should calculate the formal charge and show the calculation steps.

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pi bond will break first, they are weaker than sigma bonds.

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Most of the time, these two conditions will exist together, but if under some special condition, formal charge is more important.

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A valence electron is an outer shell electron that is associated with an atom, so we only count the outer most shell's electrons as valence electrons.

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In my opinion, they are not breaking the octet rule. The reason that they can have more than 8 electrons is they have the d shell, which can contain more electrons.

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it is a little bit different, it increases when it goes up. F has a large electronegativity.

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The covalent bond is always formed molecular, ironic bonds always form the salt.

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Yes, we use = to get the minimum number.

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E=hv or you can get E=hc/λ from combine C=λv and E=hv.

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Most of the time we use 1/2mv^2 to calculate velocity.

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The highest energy always with the shortest wavelength. I'm wondering what do you mean for the 'gap'?

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If you have the frequency of the photon, you can get the energy of the photon by E=hv. Then if the kinetic energy of the electron is 0, you can get the work function=energy of the photon.

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In my opinion, this formula is only for the kinetic energy, or sometimes the electron doesn't have kinetic energy.

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Yes, you were correct. However, it doesn't have to be exact peak from peak. It can be anywhere on the same horizon, and make sure it is one period.

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It includes the discussion in Chemistry Community, weekly homework, midterm, and final grade. Your total point will be 500. You can find more detailed information from your class syllabus.

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No, we don't. They will give us when we have a test.

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Can we use the Einstein equation for other subjects except for light?

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The key is the fraction. In a chemical reaction, the stoichiometric coefficient represents the fraction of each chemical substance. Because of the fraction of N2 H2 and NH3 is 1:3:2, the amount's fraction of them is also 1:3:2. Thus, when the N2 is 1mol, H2 is 3mol, NH3 is 2mol.

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Most of the time, it is in grams. Sometimes it might be the kg, but it's very rare.

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It is the concentration of a certain substance in the solution. You can use it to solve how much substance you have to put to make a certain concentration of solution, such as 100ml 80% KCl solution need how much solid KCl.

CHEMISTRY COMMUNITY

Search found 33 matches

Re: prefix

Re: Polydentate

Re: Electrons

Re: Oxidation states

Re: Lewis Acids and Bases

Re: H-bonds [ENDORSED]

Re: Dipoles

Re: Radicals

Re: Molecule Formulas

Re: Resonance Hybrid

Re: Complete Lewis Structure [ENDORSED]

Re: how to draw lewis structure

Re: how to draw lewis structure

Re: Formal Charge

Re: Which bond would break first.

Re: Octet vs formal charge

Re: Valence electrons

Re: breaking the octet

Re: Trend of Electronegativity

Re: Ionic vs.covalent bonding

Re: heisenberg's

Re: Energy of photon [ENDORSED]

Re: Calculating Velocity

Re: Spectral Lines and Energy Levels

Re: work function

Re: Kinetic energy

Re: wavelength

Re: Final Grade

Re: Numbers to memorize [ENDORSED]

Einstein equation

Re: Stoichiometric reactions

Re: Theoretical/Actual Yield

Re: MOLARITY