Search found 62 matches

by Anjali_Kumar1F
Sat Mar 16, 2019 11:07 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation Energy
Replies: 2
Views: 10

Re: Activation Energy

What affects or changes the Activation Energy?
by Anjali_Kumar1F
Sat Mar 16, 2019 11:06 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation Energy
Replies: 2
Views: 10

Activation Energy

In the Arrhenius Equation, what does the A stand for? What is that?
by Anjali_Kumar1F
Sat Mar 16, 2019 10:54 am
Forum: Student Social/Study Group
Topic: Lyndon's Review Sess
Replies: 6
Views: 62

Re: Lyndon's Review Sess

I can't find it.
by Anjali_Kumar1F
Fri Mar 15, 2019 8:05 pm
Forum: Student Social/Study Group
Topic: Studying for the Final
Replies: 25
Views: 220

Re: Studying for the Final

It says he will post it 9 am tomorrow morning.
by Anjali_Kumar1F
Sun Mar 10, 2019 8:16 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: delta G
Replies: 5
Views: 49

Re: delta G

How is a photosynthesis reaction exergonic?
by Anjali_Kumar1F
Sun Mar 10, 2019 8:15 pm
Forum: First Order Reactions
Topic: first order reactions examples
Replies: 3
Views: 18

Re: first order reactions examples

How do you know if it's a first order reaction?
by Anjali_Kumar1F
Sun Mar 10, 2019 8:13 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Final Exam
Replies: 23
Views: 134

Re: Final Exam

Do you know when Lyndon will post his final review worksheet?
by Anjali_Kumar1F
Sun Mar 03, 2019 6:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788982

Re: Post All Chemistry Jokes Here

Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
by Anjali_Kumar1F
Sun Mar 03, 2019 6:22 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Kinetics HW help
Replies: 1
Views: 24

Kinetics HW help

Can someone help me on number 27 from the 6th edition?
by Anjali_Kumar1F
Sun Mar 03, 2019 6:19 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Kinetics
Replies: 7
Views: 51

Re: Kinetics

What does it mean if Kinetics is controlling a reaction?
by Anjali_Kumar1F
Sat Feb 23, 2019 11:02 pm
Forum: Balancing Redox Reactions
Topic: H OH and H20
Replies: 2
Views: 20

Re: H OH and H20

Then when do you use OH-?
by Anjali_Kumar1F
Sat Feb 23, 2019 11:01 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic Cell Diagram
Replies: 3
Views: 31

Re: Galvanic Cell Diagram

Yeah I would just be familiar with it just in case.
by Anjali_Kumar1F
Sat Feb 23, 2019 5:03 pm
Forum: Balancing Redox Reactions
Topic: HW help
Replies: 1
Views: 24

HW help

Can someone help me on 14.5 on the 6th edition? I don't get how or where to add H2O to the equation.
by Anjali_Kumar1F
Wed Feb 13, 2019 11:53 pm
Forum: Phase Changes & Related Calculations
Topic: ΔH vs ΔU?
Replies: 8
Views: 109

Re: ΔH vs ΔU?

If enthalpy is given do we automatically assume the reaction is at constant pressure.
by Anjali_Kumar1F
Wed Feb 13, 2019 11:52 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Reversible Reactions
Replies: 8
Views: 90

Re: Reversible Reactions

All isothermal reactions have delta U=0 and all constant pressure w=0.
by Anjali_Kumar1F
Wed Feb 13, 2019 1:51 pm
Forum: Administrative Questions and Class Announcements
Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
Replies: 179
Views: 5259

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)

Is there answer where it shows the work for these worksheets.
by Anjali_Kumar1F
Sat Feb 09, 2019 3:24 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: delta H
Replies: 3
Views: 34

Re: delta H

How do you find delta H.
by Anjali_Kumar1F
Sat Feb 09, 2019 2:27 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Reversible Exapansion
Replies: 2
Views: 28

Reversible Exapansion

What is reversible and irreversible expansion can some explain this to me.
by Anjali_Kumar1F
Sat Feb 09, 2019 2:20 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: midterm [ENDORSED]
Replies: 4
Views: 68

Re: midterm [ENDORSED]

When is Lyndon going to post his midterm review ws??
by Anjali_Kumar1F
Sun Feb 03, 2019 5:44 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Spontaneity of Exo and Endo reactions
Replies: 4
Views: 34

Re: Spontaneity of Exo and Endo reactions

Why aren't all exothermic reaction spontaneous?
by Anjali_Kumar1F
Sun Feb 03, 2019 5:43 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: MIDTERM MATERIAL QUESTION
Replies: 2
Views: 44

Re: MIDTERM MATERIAL QUESTION

Look at the outlines posted on his website it tells what chapters do need to know.
by Anjali_Kumar1F
Sat Jan 26, 2019 10:29 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy Units
Replies: 7
Views: 64

Re: Enthalpy Units

What is the standard enthalpy of formation?
by Anjali_Kumar1F
Sat Jan 26, 2019 10:27 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: states of reactants and products
Replies: 3
Views: 41

Re: states of reactants and products

In the lecture, he said that since reactants and product can be different states and reactions can occur at different pressure, the enthalpy of a reaction can be different.
by Anjali_Kumar1F
Sat Jan 26, 2019 10:24 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy signs
Replies: 13
Views: 79

Re: Enthalpy signs

What is state property and what does it mean when enthalpy is state property.
by Anjali_Kumar1F
Sat Jan 19, 2019 6:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 10^-3 as a comparison
Replies: 2
Views: 30

Re: 10^-3 as a comparison

so if it is <10^-3 you take out the x in the denominator
by Anjali_Kumar1F
Sat Jan 19, 2019 6:34 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Partial Pressure and Moles
Replies: 3
Views: 41

Re: Partial Pressure and Moles

Can you make an ICE table for partial pressure or is just used for concentration?
by Anjali_Kumar1F
Tue Jan 15, 2019 9:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: HW 6B.11 7th Ed
Replies: 1
Views: 31

Re: HW 6B.11 7th Ed

Can someone help me with 11.41 from 6th edition
by Anjali_Kumar1F
Sat Jan 12, 2019 10:48 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Understanding Q
Replies: 3
Views: 40

Re: Understanding Q

What is quotient and what is the difference between quotient and K if they are calculated the same way.
by Anjali_Kumar1F
Sat Jan 12, 2019 10:45 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: pressure and temperature
Replies: 4
Views: 27

Re: pressure and temperature

Does temperature change or affect the concentration(K) and why?
by Anjali_Kumar1F
Fri Jan 11, 2019 4:09 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Q and K
Replies: 13
Views: 129

Re: Q and K

Can someone help me with 11.33 from the 6th edition tb. I keep on getting 69.4 instead of 6.9.
by Anjali_Kumar1F
Sun Dec 09, 2018 5:41 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strengths of H2S vs H2Se
Replies: 4
Views: 116

Re: Strengths of H2S vs H2Se

Why is London Disperse Force in every bond?
by Anjali_Kumar1F
Sun Dec 09, 2018 5:39 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Ligands
Replies: 6
Views: 75

Re: Ligands

What is the function of cisplatin?
by Anjali_Kumar1F
Sun Dec 09, 2018 5:35 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Why HF is a weaker acid than HCl
Replies: 11
Views: 115

Re: Why HF is a weaker acid than HCl

Why is it when there is more oxygen then the bond is more acidic?
by Anjali_Kumar1F
Thu Nov 29, 2018 10:02 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand charge
Replies: 4
Views: 52

Re: Ligand charge

Do we need to know the biological importance for the final?
by Anjali_Kumar1F
Thu Nov 29, 2018 9:50 pm
Forum: Naming
Topic: Naming complexes and coordination compounds
Replies: 4
Views: 51

Re: Naming complexes and coordination compounds

What was he saying about the bis, tris and all when are we supposed to use that?
by Anjali_Kumar1F
Mon Nov 26, 2018 7:22 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 9
Views: 46

Re: VSEPR

What is the difference between square planar and tetrahedral?
by Anjali_Kumar1F
Mon Nov 26, 2018 7:21 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 9
Views: 46

Re: VSEPR

What is the difference between square planar and tetrahedral?
by Anjali_Kumar1F
Mon Nov 26, 2018 7:20 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 9
Views: 46

Re: VSEPR

What is the steric number and why is it important?
by Anjali_Kumar1F
Mon Nov 26, 2018 7:19 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar vs. Non-polar
Replies: 3
Views: 46

Re: Polar vs. Non-polar

how do you know if a bond is polar or non polar?
by Anjali_Kumar1F
Fri Nov 16, 2018 10:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Repulsion and Stability
Replies: 3
Views: 37

Re: Repulsion and Stability

So lower repulsion equals higher stability ?
by Anjali_Kumar1F
Fri Nov 16, 2018 10:47 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 3
Replies: 19
Views: 231

Re: Test 3

Yeah memorizing will be easier I made flashcards which are pretty helpful.
by Anjali_Kumar1F
Fri Nov 16, 2018 10:46 pm
Forum: Lewis Structures
Topic: Molecule Shape
Replies: 8
Views: 116

Re: Molecule Shape

Do we have to know how to draw each molecular shape for the test or are we just going to be identifying them?
by Anjali_Kumar1F
Sat Nov 10, 2018 4:26 pm
Forum: Lewis Structures
Topic: Molecule Shape
Replies: 8
Views: 116

Re: Molecule Shape

Why is Hydrogen bond shape not 90 degrees but 109 degrees I didn't understand that part.
by Anjali_Kumar1F
Sat Nov 10, 2018 4:23 pm
Forum: Ionic & Covalent Bonds
Topic: Iconic v Covalent Strength
Replies: 4
Views: 44

Re: Iconic v Covalent Strength

How is covalent bond dissociation energy is related to covalent bond multiplicity, atomic radius,
and the presence of unpaired electrons? Can someone explain in detail.
by Anjali_Kumar1F
Tue Oct 30, 2018 10:36 pm
Forum: Limiting Reactant Calculations
Topic: Midterm Review Q2
Replies: 7
Views: 782

Re: Midterm Review Q2

How would I solve this? Potassium permanganate, KMnO4, is an inorganic chemical compound used for cleaning wounds. 5.00 g of KMnO4 is dissolved in a 150.00 mL flask of water. If 20.00 mL of this solution is removed and placed in a new 2nd 250.00 mL flask and filled with water, what is the concentrat...
by Anjali_Kumar1F
Tue Oct 30, 2018 8:15 pm
Forum: Limiting Reactant Calculations
Topic: Midterm Review Q2
Replies: 7
Views: 782

Re: Midterm Review Q2

How did you identify O2 is limiting reactant is it because 31.7 is less than 37.2. The smaller number is limiting reactant?
by Anjali_Kumar1F
Sun Oct 28, 2018 2:01 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Quantum Numbers n, l, and m
Replies: 5
Views: 104

Re: Quantum Numbers n, l, and m

How do you know if the spin is up or down?
by Anjali_Kumar1F
Sun Oct 28, 2018 1:57 pm
Forum: Lewis Structures
Topic: Dots in Lewis Stucture
Replies: 14
Views: 188

Re: Dots in Lewis Stucture

Yeah it doesn't matter where you place them but it needs to be placed symmetrically.
by Anjali_Kumar1F
Sun Oct 28, 2018 1:55 pm
Forum: Lewis Structures
Topic: Electron configuration
Replies: 2
Views: 29

Re: Electron configuration

The 4s state is higher in energy than 3d.
by Anjali_Kumar1F
Sat Oct 20, 2018 3:51 pm
Forum: Photoelectric Effect
Topic: Threshold energy [ENDORSED]
Replies: 17
Views: 289

Re: Threshold energy [ENDORSED]

whats is work function and how is it solved?
by Anjali_Kumar1F
Sat Oct 20, 2018 3:49 pm
Forum: Trends in The Periodic Table
Topic: s, p, d, f
Replies: 16
Views: 302

Re: s, p, d, f

The orbitals s,p,d, f have different sizes and shapes.
- s is spherical shape with 1 orbital
-p has 2 lobes on either side of nucleus with 3 orbitals
-d has 4 lobes of e- located on XY-ZX planes with 5 orbitals
f has more complicated shapes with 7 orbitals
by Anjali_Kumar1F
Sat Oct 20, 2018 12:40 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals
Replies: 4
Views: 123

Re: Orbitals

Can someone explain how to do or solve 2.45 from the 6th edition.
by Anjali_Kumar1F
Sat Oct 13, 2018 1:42 pm
Forum: Properties of Light
Topic: frequencies and wavelength
Replies: 5
Views: 64

Re: frequencies and wavelength

In the formula E=hv what does the letter v respresent? I know E is energy and h is a given number which is the constant but what is v.
by Anjali_Kumar1F
Mon Oct 08, 2018 2:39 pm
Forum: Properties of Light
Topic: frequencies and wavelength
Replies: 5
Views: 64

frequencies and wavelength

Can some explain me how to do this question step by step it is from the 6th edition. 1.7 (a) The frequency of violet light is 7.1 x10^14 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 x 10^18 Hz are emit...
by Anjali_Kumar1F
Sat Oct 06, 2018 4:55 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Moles [ENDORSED]
Replies: 6
Views: 209

Re: Moles [ENDORSED]

Its because that is the ratio. That is a balanced equation and 1 ratio Fe2O3 to 2 Fe because that what the formula is telling us.
by Anjali_Kumar1F
Thu Oct 04, 2018 9:56 pm
Forum: Balancing Chemical Reactions
Topic: L.5 Mass
Replies: 3
Views: 61

Re: L.5 Mass

What textbook edition 6 or 7?
by Anjali_Kumar1F
Thu Oct 04, 2018 9:52 pm
Forum: Limiting Reactant Calculations
Topic: Percent Yield
Replies: 5
Views: 105

Re: Percent Yield

ok that makes sense!
by Anjali_Kumar1F
Tue Oct 02, 2018 8:51 pm
Forum: Limiting Reactant Calculations
Topic: Percent Yield
Replies: 5
Views: 105

Percent Yield

I am confused on how to do this I though I just divide 25.2g/35g and multiply it by 100. I got 72% but the answer is 76.6%. What are the steps to this problem? Fundamentals M1 Hydrazine, N2H4, is an oily liquid used as a rocket fuel. It can be prepared in water by oxidizing ammonia with hypochlorite...

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