Search found 20 matches
- Thu Dec 07, 2017 12:48 pm
- Forum: Conjugate Acids & Bases
- Topic: Weak Acids/Bases and conjugate Bases/acids
- Replies: 3
- Views: 539
Weak Acids/Bases and conjugate Bases/acids
Why is it that weak acids have strong conjugate bases and vice versa for weak bases and their conjugate acids?
- Wed Dec 06, 2017 6:43 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong vs. Weak
- Replies: 5
- Views: 597
Re: Strong vs. Weak
Usually, acids with elements on the far right side of the periodic table are strong acids because of their high electronegativity.
- Wed Nov 29, 2017 9:56 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Weaks vs. Strong acids
- Replies: 3
- Views: 657
Weaks vs. Strong acids
How do you determine whether something is a strong acid or a weak acid?
- Wed Nov 29, 2017 9:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Making the "Assumption" when calculating equilibrium
- Replies: 1
- Views: 419
Re: Making the "Assumption" when calculating equilibrium
I believe in one of the videos on his website Dr. Lavelle said that a when the K value is less than 10^-4, you can make the "assumption".
- Sat Nov 25, 2017 9:22 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: 11.43
- Replies: 1
- Views: 370
11.43
Can someone explain how to solve this problem? Consider the reaction 2 NO(g) Δ N2(g) O2(g). If the initial partial pressure of NO(g) is 1.0 bar, and x is the equilibrium concentration of N2(g), what is the correct equilibrium relation? (a) K x2/(1.0 x); (b) K x2; (c) K x2/(1.0 2x)2; (d) K 4x3/(1.0 2...
- Sat Nov 25, 2017 9:19 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: 17.35
- Replies: 1
- Views: 304
17.35
17.35 Which of the following isomers of diaminobenzene can form chelating complexes?
Can someone explain what makes something a chelating complex?
Can someone explain what makes something a chelating complex?
- Wed Nov 15, 2017 5:38 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.25 lewis structure
- Replies: 4
- Views: 643
Re: 4.25 lewis structure
yes, SF4 would be the same shape and lewis structure as the SCl4 as it is shown in the answer book just with F instead of Cl.
- Wed Nov 15, 2017 5:35 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.1 Lone pairs
- Replies: 6
- Views: 880
Re: 4.1 Lone pairs
If the central atom had 3 lone pairs, and two bonds, the molecule will appear linear.
- Thu Nov 09, 2017 4:21 pm
- Forum: Lewis Structures
- Topic: Structure of C2H3N [ENDORSED]
- Replies: 2
- Views: 3502
Re: Structure of C2H3N [ENDORSED]
The lewis structure with 3 bonds between C and N is preferred because of formal charge. If were two bonds between C and C, the carbon on the end would have more than an octet. The formal charge of Nitrogen is 0 because it has 3 bonds and one lone pair.
- Wed Nov 08, 2017 11:31 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Post Module #18
- Replies: 2
- Views: 403
Post Module #18
Can someone help me solve this?
The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1% of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertain principle.
The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1% of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertain principle.
- Wed Nov 01, 2017 6:28 pm
- Forum: Electronegativity
- Topic: Finding Electronegativity
- Replies: 4
- Views: 609
Re: Finding Electronegativity
We will probably be given electronegativities of two atoms that are bonded and be asked to calculate the difference between them in order to decide the character of the bond (polar, nonpolar, ionic).
- Wed Nov 01, 2017 6:23 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 2.29
- Replies: 2
- Views: 356
Re: 2.29
So basically to figure out how many electrons are designated you can see what are the possible electrons that have these quantum numbers. For a) n=2 designates the second shell and l=1 designates p. Therefore, since this is the 2p orbital, 6 electrons can have these quantum numbers. For b) the subsh...
- Wed Oct 25, 2017 1:52 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 2.75
- Replies: 2
- Views: 351
2.75
Can someone explain why s-block metals typically more reactive than p-block metals?
- Tue Oct 24, 2017 7:23 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: HW Question 2.43
- Replies: 4
- Views: 614
Re: HW Question 2.43
The [Xe] takes into account all of the electron configurations before it so you would not need to include 5s^2 5p^6 5p^5 for the configuration of tungsten. You only need to include the electrons after Xenon up to Tungsten in the electron configuration.
- Wed Oct 18, 2017 7:49 pm
- Forum: Properties of Light
- Topic: Homework 1.9
- Replies: 2
- Views: 399
Re: Homework 1.9
For the test I'm pretty sure you just have to know that from 400-700nm is visible light. Below 400nm is UV light and above 700nm is infrared. Extremely high freq. can be implied that it is x-rays or gamma-rays, while extremely low freq. are micowaves or radio waves. It is not necessary to memorize t...
- Wed Oct 18, 2017 2:41 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 2.17
- Replies: 2
- Views: 319
2.17
Can someone explain how to answer this problem?
How many orbitals are in subshells with l equal to (a) 0; (b) 2; (c) 1; (d) 3?
How many orbitals are in subshells with l equal to (a) 0; (b) 2; (c) 1; (d) 3?
- Wed Oct 11, 2017 4:40 pm
- Forum: Properties of Light
- Topic: Work Functions
- Replies: 4
- Views: 723
Work Functions
What does the work function of a metal mean and imply for photoelectric effect?
- Wed Oct 11, 2017 4:13 pm
- Forum: Properties of Light
- Topic: 1.23
- Replies: 4
- Views: 600
1.23
Can someone help me solve this question?
The gamma-ray photons emitted by the nuclear decay pf a technetium-99 atoms used in radoopharmaceuticals have an energy of 140.511 keV. Calculate the wavelength of these gamma rays.
The gamma-ray photons emitted by the nuclear decay pf a technetium-99 atoms used in radoopharmaceuticals have an energy of 140.511 keV. Calculate the wavelength of these gamma rays.
- Thu Oct 05, 2017 3:00 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Question about G.13
- Replies: 3
- Views: 474
Re: Question about G.13
In this problem, you would use M(initial)V(initial)= M(final) V(final) to find the concentration. For M(initial), plug in 1.0 L and for V(initial) plug in 0.20 M. For V(final), plug in 4.0 L, and M(final) is unknown. Solve for M, and you get 0.050 M. To find the number moles of NH4NO3 received, mult...
- Thu Oct 05, 2017 2:36 pm
- Forum: Empirical & Molecular Formulas
- Topic: Fundamentals F21
- Replies: 3
- Views: 575
Re: Fundamentals F21
In the solution for this problem, they use mmoles instead of moles because the initial masses are in mg. If you choose to use mmoles, you dont have to convert each mass to grams, but instead converting the masses to mmoles. If you choose to convert from mg to g, this would still work and you would b...