Search found 65 matches

by aphung1E
Tue Jan 21, 2020 12:14 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Increase in Pressure
Replies: 1
Views: 7

Increase in Pressure

Can someone explain how pressure affects equilibrium?

State whether reactants or products will be favored by an increase in the total pressure (resulting from compression) on each of the following equilibria. If there is no change, explain why that is so.
by aphung1E
Tue Jan 21, 2020 12:11 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Expansion within an equation
Replies: 1
Views: 9

Expansion within an equation

how does expansion affect a reaction and because of it which is more favored products or reactants?
by aphung1E
Tue Jan 21, 2020 12:10 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Noble Gases
Replies: 1
Views: 4

Noble Gases

Why do noble gases neither affect the reactants or products in an equilibrium equation?
by aphung1E
Tue Jan 21, 2020 12:09 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Difference between K and Kc
Replies: 1
Views: 8

Difference between K and Kc

What is the difference between K and Kc? Can they be used interchangeably?
by aphung1E
Tue Jan 21, 2020 12:08 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: help with hw problem
Replies: 1
Views: 10

help with hw problem

For the reaction H2(g) 1 I2(g) ∆ 2 HI(g), K 5 160. at 500. K. An analysis of a reaction mixture at 500. K showed that it had the composition PH2 5 0.20 bar, P I2 5 0.10 bar, and PHI 5 0.10 bar. (a) Calculate the reaction quotient. (b) Is the reaction mixture at equilibrium? (c) If not, is there a te...
by aphung1E
Tue Jan 21, 2020 12:04 am
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: help with hw problem
Replies: 1
Views: 13

help with hw problem

A reaction vessel of volume 0.500 L at 700. K contains 1.20 mmol SO2(g), 0.50 mmol O2(g), and 0.10 mmol SO3(g). At 700. K, Kc 5 1.7 3 106 for the equilibrium 2 SO2(g) 1 O2(g) ∆ 2 SO3(g). (a) Calculate the reaction quotient Qc. For part a i keep getting the wrong answer can someone show me how to app...
by aphung1E
Sun Jan 19, 2020 2:45 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Writing acid and base equations for test 1?
Replies: 1
Views: 8

Writing acid and base equations for test 1?

For test 1, will we have to write the equations for acids and bases to find their pH? Is there a certain trick to tell whether you need to se use H30+ or OH- in your equation? Can someone explain how to think logically to write an equation for a solid/base?
by aphung1E
Thu Jan 16, 2020 10:52 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Acids and Bases on test?
Replies: 3
Views: 26

Acids and Bases on test?

What should be covered in terms of acids and bases in preparation for test 1?
by aphung1E
Wed Jan 08, 2020 4:12 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hw problem 5G.5
Replies: 1
Views: 23

Hw problem 5G.5

Can someone explain how to do part b of the proble step by step as well as part c. 5G.5 The following flasks show the dissociation of a diatomic molecule, X2, over time. (a) Which flask represents the point in time at which the reaction has reached equilibrium? (b) What percentage of the X2 molecule...
by aphung1E
Mon Jan 06, 2020 8:39 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hw Problem 5G2(d)
Replies: 1
Views: 28

Hw Problem 5G2(d)

(d) If the Gibbs free energy is greater than the standard Gibbs free energy of reaction, the reaction proceeds forward to equilibrium.
Can someone explain how to solve this problem? Can you also explain what Gibbs free energy is?
by aphung1E
Mon Jan 06, 2020 8:37 pm
Forum: Ideal Gases
Topic: Dynamic Equilibrium
Replies: 10
Views: 54

Dynamic Equilibrium

Can someone explain dynamic equilibrium?
by aphung1E
Mon Jan 06, 2020 8:33 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Heterogeneous Equilibria
Replies: 2
Views: 24

Heterogeneous Equilibria

For a heterogeneous equilibrium, what expression is utilized to find the equilibrium constant?
by aphung1E
Mon Jan 06, 2020 8:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hw Problem G2
Replies: 5
Views: 49

Hw Problem G2

True or False: the equilibrium concentrations will be the same whether one starts wit pure reactants or pure products.
by aphung1E
Mon Jan 06, 2020 8:27 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium Expression
Replies: 2
Views: 29

Equilibrium Expression

Does the equation to find the equilibrium constant only apply to ideal gases or can it be used as well when there are phase changes?
by aphung1E
Thu Dec 05, 2019 5:48 pm
Forum: Conjugate Acids & Bases
Topic: Hw problem 6A.7
Replies: 1
Views: 14

Hw problem 6A.7

Below are molecular models of two oxoacids. Write the
name of each acid and then draw the model of its conjugate base.
(Red 5 O, white 5 H, green 5 Cl, and blue 5 N.) Does it matter the format your write the molecular formula?
by aphung1E
Thu Dec 05, 2019 5:45 pm
Forum: Bronsted Acids & Bases
Topic: Difference between bronsted and conjugate
Replies: 2
Views: 13

Difference between bronsted and conjugate

Can someone clarify the difference between bronsted acids and bases and conjugate acids and bases?
by aphung1E
Thu Dec 05, 2019 5:41 pm
Forum: Lewis Acids & Bases
Topic: Lewis Acid Base & Bronsted Acid And Base
Replies: 1
Views: 11

Lewis Acid Base & Bronsted Acid And Base

how is bronsted acids and bases connected to lewis acids and bases? what makes acid a lewis acid and vise versa with a bronsted acid?
by aphung1E
Thu Dec 05, 2019 5:39 pm
Forum: Lewis Acids & Bases
Topic: Hw problem 6A.11
Replies: 1
Views: 11

Hw problem 6A.11

For problem 6A.11 part A how do they get the product (h30)+ + (co3)^2- ?
by aphung1E
Thu Dec 05, 2019 5:35 pm
Forum: Lewis Acids & Bases
Topic: Hw problem 6A.13
Replies: 1
Views: 19

Hw problem 6A.13

For problem 6a.13, is there any way to tell whether a molecule is an acid or base?
by aphung1E
Sun Dec 01, 2019 3:36 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Characteristics of a polydentate ligand
Replies: 3
Views: 17

Characteristics of a polydentate ligand

How can you tell if a ligand is polydentate?
by aphung1E
Sun Dec 01, 2019 3:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: meaning of edta and en
Replies: 1
Views: 16

meaning of edta and en

what does edta and en represent in a coordination compound
by aphung1E
Sun Dec 01, 2019 3:30 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: hw problem
Replies: 1
Views: 16

hw problem

With the help of Table 9C.1, determine the coordination
number of the metal ion in each of the following complexes:
1; (c) [PtCl2(en)2]2+
21; (d) [Cr(edta)]-
can soomeone explain step by step how to do this problem.
by aphung1E
Sun Dec 01, 2019 3:27 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Finding coordination number
Replies: 1
Views: 23

Finding coordination number

can someone explain step by step how to find coordination number of sodium dichloridobis(oxalato)platinate(IV).
by aphung1E
Sun Dec 01, 2019 3:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Hw 9C1. PART C
Replies: 1
Views: 15

Hw 9C1. PART C

Name each of the following complex ions and identify the
oxidation number of the metal: (c) [Co(CN)5(OH2)]^2-
by aphung1E
Sun Dec 01, 2019 3:20 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Hw problem 9C1.A
Replies: 2
Views: 21

Hw problem 9C1.A

Name each of the following complex ions and identify the
oxidation number of the metal: (a) [Fe(CN)6]
by aphung1E
Sun Dec 01, 2019 3:15 pm
Forum: Naming
Topic: explain Coordination compound
Replies: 5
Views: 29

explain Coordination compound

Can someone explain conceptually what coordination compounds are
by aphung1E
Sun Nov 24, 2019 8:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs in Cation/ Anion
Replies: 2
Views: 19

Lone Pairs in Cation/ Anion

how do lone pairs around a central atom affect the bond angles in a cation/anion?
by aphung1E
Sun Nov 24, 2019 8:02 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs on Cenrtral Atom
Replies: 11
Views: 40

Lone Pairs on Cenrtral Atom

how do lone pairs around a central atom affect the bond angles in a molecule?
by aphung1E
Sun Nov 24, 2019 8:01 pm
Forum: Resonance Structures
Topic: Lone Pairs
Replies: 3
Views: 27

Lone Pairs

why are lone pairs more likely to be found in certain locations around a central atom?
by aphung1E
Sun Nov 24, 2019 8:00 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Hw Problem (boiling point)
Replies: 1
Views: 20

Hw Problem (boiling point)

Can someone explain how to find which has highest to lowest boiling point: H2S, H2O, KCl, KI
by aphung1E
Sun Nov 24, 2019 7:57 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Molecule BH2 polar or nonpolar
Replies: 2
Views: 32

Molecule BH2 polar or nonpolar

I though BH2 would be polar, but apparently it is nonpolar. Can someone explain why BH2 is nonpolar?
by aphung1E
Sun Nov 24, 2019 7:56 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Explain VSEPR conceptually
Replies: 12
Views: 51

Explain VSEPR conceptually

Can someone explain what VSEPR does or what information it tells us?
by aphung1E
Thu Nov 14, 2019 8:46 pm
Forum: Bond Lengths & Energies
Topic: Explain what ion-ion, ion-dipole, etc.
Replies: 1
Views: 38

Explain what ion-ion, ion-dipole, etc.

Can someone explain what are ion-ion, ion-dipole, dipole-dipole, dipole-induced dipole, and induced-induced dipole is?
by aphung1E
Thu Nov 14, 2019 8:43 pm
Forum: Dipole Moments
Topic: Dipole Moment to figure out polarity
Replies: 3
Views: 22

Dipole Moment to figure out polarity

Can someone explain how to use dipole moments to figure out if a molecule is polar or not?
by aphung1E
Thu Nov 14, 2019 8:40 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: hw problem 2D.11
Replies: 2
Views: 33

hw problem 2D.11

Can someone explain how to solve this?

Arrange the anions Cl 2 , Br 2 , N 32 , and O 22 in order of
increasing polarizability and give reasons for your decisions.
by aphung1E
Thu Nov 14, 2019 8:38 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing power vs polarizability
Replies: 5
Views: 40

Polarizing power vs polarizability

What is the difference between polarizing power and polarizability?
by aphung1E
Thu Nov 14, 2019 8:38 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability
Replies: 5
Views: 45

Polarizability

How do you determine if a compound is polar or not?
by aphung1E
Thu Nov 07, 2019 10:09 pm
Forum: Dipole Moments
Topic: Discussion Worksheet
Replies: 1
Views: 19

Discussion Worksheet

I need help solving this problem. Please explain step by step.

Arrange the anions Cl^-, Br^-, N^3-, O^2- in order of increasing polarizability ad give reasons for your decisions.
by aphung1E
Thu Nov 07, 2019 10:05 pm
Forum: Dipole Moments
Topic: Explain concept
Replies: 4
Views: 31

Explain concept

I'm still not understanding the concept of dipole moment too well. Can someone explain how this applies in lewis structures?
by aphung1E
Thu Nov 07, 2019 10:02 pm
Forum: Lewis Structures
Topic: Formal Charges
Replies: 15
Views: 65

Formal Charges

Is it better for the central atom to have a +/- charge or have the other atoms take the +/- charge? And if so, why?
by aphung1E
Thu Nov 07, 2019 10:00 pm
Forum: Lewis Structures
Topic: Exceptions to Octet Rule
Replies: 7
Views: 33

Exceptions to Octet Rule

Is it true that elements located in period 3 specifically elements Al-Ar are an exception to the octet rule? And if so why?
by aphung1E
Thu Nov 07, 2019 9:58 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures
Replies: 18
Views: 72

Drawing Lewis Structures

When drawing regular lewis structures do you always have to draw them where their formal charges are zero?
by aphung1E
Wed Oct 30, 2019 1:17 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Hw problem 2A.15
Replies: 1
Views: 28

Hw problem 2A.15

How do you solve this ? Is there a certain rule you have to follow?
2A.15 Write the most likely charge for the ions formed by each of
the following elements: (a) S; (b) Te; (c) Rb; (d) Ga; (e) Cd.
by aphung1E
Wed Oct 30, 2019 1:13 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Hw problem 2A.13
Replies: 4
Views: 32

Hw problem 2A.13

Can someone show step by step how to do this problem?
2A.13 For each of the following ground-state atoms, predict the
type of orbital (1s, 2p, 3d, 4f, etc.) from which an electron will need
to be removed to form the 1 1 ions: (a) Zn; (b) Cl; (c) Al; (d) Cu
by aphung1E
Wed Oct 30, 2019 1:10 am
Forum: Lewis Structures
Topic: Resonance
Replies: 4
Views: 28

Resonance

Can someone clear up what resonance is because what I'm grasping from this topic is that its an electron that can be in different arrangements.
by aphung1E
Wed Oct 30, 2019 1:04 am
Forum: Lewis Structures
Topic: Formal charge
Replies: 9
Views: 64

Re: Formal charge

While trying to find the formal charge, how do you find the shared electrons?
by aphung1E
Wed Oct 30, 2019 1:01 am
Forum: Lewis Structures
Topic: Formal charge
Replies: 9
Views: 64

Re: Formal charge

Can someone explain how to find the lone pair electrons when trying to find the formal charge?
by aphung1E
Wed Oct 23, 2019 3:51 pm
Forum: Octet Exceptions
Topic: Octet Rule
Replies: 6
Views: 49

Octet Rule

If the element is past the second period in the periodic table does it still need to follow the octet rule?
by aphung1E
Wed Oct 23, 2019 3:48 pm
Forum: Lewis Structures
Topic: Finding Valence Electrons
Replies: 8
Views: 51

Finding Valence Electrons

How do you determine how many valence electrons an element has using the periodic table?
by aphung1E
Wed Oct 23, 2019 3:43 pm
Forum: Lewis Structures
Topic: Electronegativity
Replies: 5
Views: 43

Electronegativity

How do you determine which element is less electronegative in a compound element?
by aphung1E
Wed Oct 23, 2019 3:40 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Spin
Replies: 8
Views: 55

Re: Electron Spin

Does Hund's rule apply to the Pauli Exclusion Principle?
by aphung1E
Wed Oct 23, 2019 3:37 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 8
Views: 71

Re: Ionization Energy

Does the ionization energy increase/decrease down a group in the periodic table?
by aphung1E
Fri Oct 18, 2019 7:49 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: quantum number n, l, m
Replies: 13
Views: 87

spin state

How do you know if an electron will spin up or spin down? It depends on the values for n,l,m, right?
by aphung1E
Fri Oct 18, 2019 7:45 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: quantum number n, l, m
Replies: 13
Views: 87

Re: quantum number n, l, m

Do n,l, m always follow a certain patter or does it vary?
ex: n=1, l=0, m=0 < will it always follow this pattern?
by aphung1E
Fri Oct 18, 2019 7:42 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: quantum number n, l, m
Replies: 13
Views: 87

Describe subshell

Can someone explain what subshells are and how they relate to the orbital?
by aphung1E
Fri Oct 18, 2019 7:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1594

Valence Electrons [ENDORSED]

How do you determine which are the valence electrons after you write out your electron configuration?
by aphung1E
Tue Oct 15, 2019 11:38 pm
Forum: Properties of Light
Topic: Homework help
Replies: 4
Views: 53

Re: Homework help

For this problem, do I need to find the mole of sodium?

1B.7 Sodium vapor lamps, used for public lighting, emit yellow
light of wavelength 589 nm. How much energy is emitted by (a) an
excited sodium atom when it generates a photon;
by aphung1E
Tue Oct 15, 2019 11:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1594

Re: Week 3 Homework Problems [ENDORSED]

For part a what equation can be used to solve for wavelength? The velocity of an electron that is emitted from a metallic surface by a photon is 3.6x10^3 kms (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of the radi...
by aphung1E
Wed Oct 09, 2019 6:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1594

Re: Week 2 Homework Problems [ENDORSED]

1A.9 A college student recently had a busy day. Each of the student’s activities on that day (reading, getting a dental x-ray, making popcorn in a microwave oven, and acquiring a suntan) involved radiation from a different part of the electromagnetic spectrum. Complete the following table and match ...
by aphung1E
Wed Oct 09, 2019 6:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1594

Re: Week 2 Homework Problems [ENDORSED]

Does anyone know the energy of microwaves?

Arrange the following types of photons of electromagnetic
radiation in order of increasing energy: g -rays, visible light, ultraviolet radiation, microwaves, x-rays.
by aphung1E
Wed Oct 09, 2019 6:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1594

Re: Week 2 Homework Problems [ENDORSED]

What conversion would we use to turn the value into picometers? 1A.7 (a) The frequency of violet light is 7.1 3 10 14 Hz. What is the wavelength (in nanometers) of violet light? (b) When an electron beam strikes a block of copper, x-rays with a frequency of 2.0 3 10 18 Hz are emitted. What is the wa...
by aphung1E
Wed Oct 09, 2019 6:46 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1594

Re: Week 2 Homework Problems [ENDORSED]

What equation should be utilized for this problem?


1A.15 In the ultraviolet spectrum of atomic hydrogen, a line is
observed at 102.6 nm. Determine the values of n for the initial and
final energy levels of the electron during the emission of energy
that leads to this spectral line.
by aphung1E
Wed Oct 09, 2019 6:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 2 Homework Problems [ENDORSED]
Replies: 67
Views: 1594

Re: Week 2 Homework Problems [ENDORSED]

Can someone clarify the answer? Which of the following statements about the electromagnetic spectrum is true? Explain your reasoning. (a) X-rays travel faster than infrared radiation because they have higher energy. (b) The wavelength of visible radiation decreases as its color changes from blue to ...
by aphung1E
Tue Oct 01, 2019 10:04 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Formula Units
Replies: 3
Views: 56

Re: Problem E. 25

A) to turn moles into formula units/atoms i used the equation from the textbook Number of object=amount in moles x avagadro's constant so you multiply 0.750 mol KNO3 x (6.022x10^23) and get 4.52x10^23 formula units. B) They're asking us for the mass so we will need to find the moles. With the formul...
by aphung1E
Tue Oct 01, 2019 9:17 pm
Forum: Molarity, Solutions, Dilutions
Topic: Please Clarify L35
Replies: 2
Views: 39

Re: Please Clarify L35

The "t" stands for tons I believe so you just need to convert tons into kilograms.

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