Search found 20 matches

by Ashley Chipoletti 1I
Thu Dec 07, 2017 12:48 pm
Forum: Conjugate Acids & Bases
Topic: Weak Acids/Bases and conjugate Bases/acids
Replies: 3
Views: 314

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?
by Ashley Chipoletti 1I
Wed Dec 06, 2017 6:43 pm
Forum: Bronsted Acids & Bases
Topic: Strong vs. Weak
Replies: 5
Views: 347

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.
by Ashley Chipoletti 1I
Wed Nov 29, 2017 9:56 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Weaks vs. Strong acids
Replies: 3
Views: 384

Weaks vs. Strong acids

How do you determine whether something is a strong acid or a weak acid?
by Ashley Chipoletti 1I
Wed Nov 29, 2017 9:42 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Making the "Assumption" when calculating equilibrium
Replies: 1
Views: 165

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".
by Ashley Chipoletti 1I
Sat Nov 25, 2017 9:22 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: 11.43
Replies: 1
Views: 243

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...
by Ashley Chipoletti 1I
Sat Nov 25, 2017 9:19 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 17.35
Replies: 1
Views: 195

17.35

17.35 Which of the following isomers of diaminobenzene can form chelating complexes?

Can someone explain what makes something a chelating complex?
by Ashley Chipoletti 1I
Wed Nov 15, 2017 5:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.25 lewis structure
Replies: 4
Views: 349

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.
by Ashley Chipoletti 1I
Wed Nov 15, 2017 5:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.1 Lone pairs
Replies: 6
Views: 539

Re: 4.1 Lone pairs

If the central atom had 3 lone pairs, and two bonds, the molecule will appear linear.
by Ashley Chipoletti 1I
Thu Nov 09, 2017 4:21 pm
Forum: Lewis Structures
Topic: Structure of C2H3N [ENDORSED]
Replies: 2
Views: 2498

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.
by Ashley Chipoletti 1I
Wed Nov 08, 2017 11:31 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Post Module #18
Replies: 2
Views: 259

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.
by Ashley Chipoletti 1I
Wed Nov 01, 2017 6:28 pm
Forum: Electronegativity
Topic: Finding Electronegativity
Replies: 4
Views: 364

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).
by Ashley Chipoletti 1I
Wed Nov 01, 2017 6:23 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 2.29
Replies: 2
Views: 203

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...
by Ashley Chipoletti 1I
Wed Oct 25, 2017 1:52 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 2.75
Replies: 2
Views: 205

2.75

Can someone explain why s-block metals typically more reactive than p-block metals?
by Ashley Chipoletti 1I
Tue Oct 24, 2017 7:23 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW Question 2.43
Replies: 4
Views: 373

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.
by Ashley Chipoletti 1I
Wed Oct 18, 2017 7:49 pm
Forum: Properties of Light
Topic: Homework 1.9
Replies: 2
Views: 271

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...
by Ashley Chipoletti 1I
Wed Oct 18, 2017 2:41 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 2.17
Replies: 2
Views: 208

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?
by Ashley Chipoletti 1I
Wed Oct 11, 2017 4:40 pm
Forum: Properties of Light
Topic: Work Functions
Replies: 4
Views: 430

Work Functions

What does the work function of a metal mean and imply for photoelectric effect?
by Ashley Chipoletti 1I
Wed Oct 11, 2017 4:13 pm
Forum: Properties of Light
Topic: 1.23
Replies: 4
Views: 397

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.
by Ashley Chipoletti 1I
Thu Oct 05, 2017 3:00 pm
Forum: Molarity, Solutions, Dilutions
Topic: Question about G.13
Replies: 3
Views: 302

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...
by Ashley Chipoletti 1I
Thu Oct 05, 2017 2:36 pm
Forum: Empirical & Molecular Formulas
Topic: Fundamentals F21
Replies: 3
Views: 311

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...

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