Search found 52 matches

by Glendy Gonzalez 1A
Sun Mar 18, 2018 7:20 pm
Forum: General Rate Laws
Topic: rate law
Replies: 6
Views: 494

Re: rate law

Rate Laws do not include products.
by Glendy Gonzalez 1A
Sun Mar 18, 2018 9:06 am
Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Topic: Final
Replies: 3
Views: 606

Final

In the final, would we have to identify the functional groups from complex molecules or when they are alone?
by Glendy Gonzalez 1A
Sun Mar 18, 2018 9:02 am
Forum: Balancing Redox Reactions
Topic: test 2
Replies: 5
Views: 368

Re: test 2

The answer should be E=-0.037V
by Glendy Gonzalez 1A
Sat Mar 17, 2018 3:49 pm
Forum: General Rate Laws
Topic: Test #3 Q. 3
Replies: 2
Views: 344

Test #3 Q. 3

How do you solve question #3 on the kinetics test?
by Glendy Gonzalez 1A
Sun Mar 11, 2018 10:22 pm
Forum: *Enzyme Kinetics
Topic: Kinetics and Enzymes
Replies: 7
Views: 544

Kinetics and Enzymes

What role do enzymes play in kinetics?
by Glendy Gonzalez 1A
Sun Mar 11, 2018 10:14 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Given information
Replies: 5
Views: 219

Re: Given information

I am pretty sure it should be specified which one is the slow and fast reaction. I am not sure about the intermediate though.
by Glendy Gonzalez 1A
Mon Mar 05, 2018 10:48 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Unique rates
Replies: 4
Views: 215

Unique rates

What are unique rates? Do we need to know that for test 3?
by Glendy Gonzalez 1A
Sun Mar 04, 2018 11:46 pm
Forum: First Order Reactions
Topic: half-lives
Replies: 4
Views: 188

Re: half-lives

Half lives can allow you to determine the age of an artifact/fossils, measure radioactive decay, and many other things.
by Glendy Gonzalez 1A
Sun Mar 04, 2018 11:35 pm
Forum: Zero Order Reactions
Topic: Identifying zero order
Replies: 6
Views: 235

Identifying zero order

How can you identify a zero order reactant based on a table? Is there a "shortcut"?
by Glendy Gonzalez 1A
Sun Mar 04, 2018 11:33 pm
Forum: General Rate Laws
Topic: general rate laws
Replies: 3
Views: 139

Re: general rate laws

Thank is the general law, but as mentioned before the exponents would change depending on the order of the reactants.
by Glendy Gonzalez 1A
Mon Feb 26, 2018 7:15 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 14.47
Replies: 3
Views: 162

14.47

For part a. in the solution manual the value of Q is 10^6, but I keep getting 3269017. What am I doing wrong? Isn't the e^15=3269017.
by Glendy Gonzalez 1A
Sun Feb 25, 2018 10:02 pm
Forum: General Rate Laws
Topic: Slow Step
Replies: 2
Views: 98

Re: Slow Step

The slow step is known as the rate determining step in a reaction mechanism. This step is simply the one with the slowest rate.
by Glendy Gonzalez 1A
Sun Feb 25, 2018 9:57 pm
Forum: General Rate Laws
Topic: Reaction rates
Replies: 3
Views: 144

Reaction rates

When anazyling initial reaction rates, why do we only focus on the reactant concentration?
by Glendy Gonzalez 1A
Sun Feb 25, 2018 9:53 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 14.43
Replies: 1
Views: 134

14.43

When solving for [H+], when you subtract standard E from E wouldn't the answer be negative? I keep getting -0.079 but the solutions manual has a positive value. What am I doing wrong?
by Glendy Gonzalez 1A
Sun Feb 18, 2018 9:18 pm
Forum: Balancing Redox Reactions
Topic: Balancing Redox Reactions
Replies: 4
Views: 231

Re: Balancing Redox Reactions

Yes, you use H+ in acidic solutions and OH- in basic solutions.
by Glendy Gonzalez 1A
Sun Feb 18, 2018 9:14 pm
Forum: Balancing Redox Reactions
Topic: 14.5d
Replies: 2
Views: 130

Re: 14.5d

In this problem, P4 is both the reducing and oxidizing agent. Therefore, you can start by separating and balancing both half-reactions. Remember, you start with P4 in both reactions. After balancing them you can combine them in order to get the final equation.
by Glendy Gonzalez 1A
Sun Feb 18, 2018 9:08 pm
Forum: Balancing Redox Reactions
Topic: Balancing
Replies: 3
Views: 209

Re: Balancing

Yes, You use H20 to balance the Oxygens and H+ or OH- to balance the hydrogens.
by Glendy Gonzalez 1A
Sun Feb 18, 2018 9:06 pm
Forum: Balancing Redox Reactions
Topic: "Rules"
Replies: 7
Views: 272

"Rules"

Is there a set of "rules" or order in which half-reactions should be balanced? Like do you add H20 or OH- first?
by Glendy Gonzalez 1A
Wed Feb 14, 2018 12:21 am
Forum: Van't Hoff Equation
Topic: Van't Hoff Equation
Replies: 2
Views: 291

Van't Hoff Equation

will the midterm focus on Van't Hoff ?
by Glendy Gonzalez 1A
Mon Feb 12, 2018 7:08 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: 9.75
Replies: 1
Views: 120

9.75

How can you determine the degeneracy of cis-MX2Y4 and trans-MX2Y4?
by Glendy Gonzalez 1A
Sun Feb 11, 2018 7:56 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Irreversible vs Reversible
Replies: 3
Views: 185

Irreversible vs Reversible

In simple terms, what is the difference between a reversible and irreversible expansion? How can you quickly identify them in a problem?
by Glendy Gonzalez 1A
Sun Feb 11, 2018 7:54 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal Expansion
Replies: 1
Views: 108

Isothermal Expansion

Can someone please explain why in an isothermal expansion the external pressure cannot be greater than the internal pressure.
by Glendy Gonzalez 1A
Sun Feb 11, 2018 11:07 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 2nd law -- conceptual
Replies: 3
Views: 155

Re: 2nd law -- conceptual

Technically, you can have a negative entropy. It would just mean it is not favorable and would not occur frequently.
by Glendy Gonzalez 1A
Sun Feb 04, 2018 4:21 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Work and Free energy
Replies: 1
Views: 64

Work and Free energy

How does work affect free energy? is there a relationship between these two terms?
by Glendy Gonzalez 1A
Sun Feb 04, 2018 4:19 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Free Energy
Replies: 2
Views: 108

Free Energy

Can someone explain how reaction free energy depends on pressure and equilibrium constant, please?
by Glendy Gonzalez 1A
Sun Feb 04, 2018 4:09 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Periodic Trends
Replies: 4
Views: 186

Re: Periodic Trends

I don't think there is a heat capacity trend of the periodic table because heat capacities depends on different factors, such as change in temperature, the system, and its mass. As well as the substance and its phase.
by Glendy Gonzalez 1A
Sun Jan 28, 2018 10:56 pm
Forum: Phase Changes & Related Calculations
Topic: degeneracy [ENDORSED]
Replies: 7
Views: 220

Re: degeneracy [ENDORSED]

Degeneracy refers to the number of ways of obtaining a certain energy state. Degeneracy and entropy are inverses of each other. That is, the higher the degeneracy, the lower the entropy.
by Glendy Gonzalez 1A
Sun Jan 28, 2018 7:47 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Definition of Entropy
Replies: 10
Views: 313

Definition of Entropy

Since we should not use the concept of disorder when defining/explaining entropy, what would be the correct definition? How would you explain entropy?
by Glendy Gonzalez 1A
Thu Jan 25, 2018 8:54 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.99
Replies: 3
Views: 157

8.99

Can someone please explain me how can you calculate the enthalpy of formation for 2HCl(aq)+Zn(s) ---> H2(g)+ZnCl2(aq). I can't find the enthalpy value for ZnCl2.
by Glendy Gonzalez 1A
Sat Jan 20, 2018 8:05 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: When to use units of kJ/mol vs kJ?
Replies: 1
Views: 111

Re: When to use units of kJ/mol vs kJ?

You will have to use the units KJ/mol whenever you are asked to calculate the enthalpy of a reaction for 1 mole of a reactant/product.
by Glendy Gonzalez 1A
Sat Jan 20, 2018 7:56 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.73
Replies: 2
Views: 142

8.73

In problem 8.73 why are the bond enthalpies for C-H not included?
by Glendy Gonzalez 1A
Sat Jan 20, 2018 7:55 pm
Forum: Phase Changes & Related Calculations
Topic: Heating Curve
Replies: 2
Views: 127

Heating Curve

In test #1, would there be questions regarding heating curves? That is, problems in which we would need to calculate the energy needed for one substance to go from one state to another.
by Glendy Gonzalez 1A
Sun Jan 14, 2018 8:24 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Type of Systems
Replies: 2
Views: 156

Type of Systems

Can someone please explain the difference between an open, closed, and isolated system? How can you identity/differentiate them?

Thank you!
by Glendy Gonzalez 1A
Sun Jan 14, 2018 8:20 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Which q is negative?
Replies: 2
Views: 122

Re: Which q is negative?

-When heat is being transferred into the system, q>0 (q is positive)
-When heat is being transferred out of the system, q<0 (q is negative)
by Glendy Gonzalez 1A
Sun Jan 14, 2018 8:13 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Molar Heat Capacity
Replies: 1
Views: 71

Molar Heat Capacity

Can someone please explain why the molar heat capacity is higher for complex molecules? How does bond vibrations affect heat capacity?
by Glendy Gonzalez 1A
Sat Dec 09, 2017 2:34 pm
Forum: Balancing Chemical Reactions
Topic: Net Number of moles produced [ENDORSED]
Replies: 3
Views: 300

Net Number of moles produced [ENDORSED]

Based on a balanced chemical equation, how can you calculate the net number of moles of gas produced?
by Glendy Gonzalez 1A
Sun Dec 03, 2017 5:38 pm
Forum: Lewis Acids & Bases
Topic: Weak Bases
Replies: 2
Views: 159

Weak Bases

Why are weak bases not completely ionized? How do weak and strong bases differ?
by Glendy Gonzalez 1A
Sun Dec 03, 2017 5:25 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Concept Q// Change in Temp
Replies: 3
Views: 192

Re: Concept Q// Change in Temp

If a reaction is exothermic and the temperature is increased, the reaction will shift to the left in order to reduce the temperature. When the reactants are favored, more heat is absorbed (Which helps absorbed the extra heat and reach equilibrium again).
by Glendy Gonzalez 1A
Sun Dec 03, 2017 5:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Part 1B Post-Module Assessment #26
Replies: 2
Views: 146

Re: Part 1B Post-Module Assessment #26

Whenever solvents are liquids or solids they are not in included in equilibrium constant expressions. This is because the change in solvent concentration is insignificant.
by Glendy Gonzalez 1A
Sat Nov 25, 2017 2:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: solvents in K
Replies: 3
Views: 154

Re: solvents in K

Something important to keep in mind is that solids and liquids are not included in k expressions.
by Glendy Gonzalez 1A
Sat Nov 25, 2017 2:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Question about ATP lecture example
Replies: 1
Views: 118

Re: Question about ATP lecture example

If initial concentrations are given, you would add/subtract that concentration by the value by which the molar concentration changes (the x value).
by Glendy Gonzalez 1A
Sat Nov 25, 2017 2:08 pm
Forum: *Molecular Orbital Theory Applied To Transition Metals
Topic: Bond Order
Replies: 2
Views: 480

Bond Order

Does anyone know if bond order would be a big component of test 4? I don't really remember discussing about it in class.
by Glendy Gonzalez 1A
Sun Nov 19, 2017 11:32 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Cis- & Trans-
Replies: 3
Views: 149

Cis- & Trans-

What is the differential between cis- and trans-? How do you know when the isomer is cis- or trans-?
by Glendy Gonzalez 1A
Sun Nov 19, 2017 11:29 am
Forum: Bond Lengths & Energies
Topic: Bond Order
Replies: 6
Views: 469

Re: Bond Order

In order to determine the bond order, add the number of bonds in that compound and divide that by the total number of atoms.
by Glendy Gonzalez 1A
Sun Nov 19, 2017 11:22 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Order
Replies: 5
Views: 325

Re: Bond Order

A BO=1.5 means that the compound has resonance structures. Therefore, all the bonds have the characteristics of both single and double bonds.
by Glendy Gonzalez 1A
Sun Nov 19, 2017 10:59 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Delocalized Pi Bond
Replies: 2
Views: 150

Re: Delocalized Pi Bond

In simple words, the term delocalized pi bond is used to describe a pi bond that can move around in the different resonate structures of a molecule.
by Glendy Gonzalez 1A
Sun Nov 19, 2017 10:48 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 3
Views: 159

Polydentate

Can someone please explain how you can determine when a ligand can be polydentate? what makes a ligand polydentate?
by Glendy Gonzalez 1A
Fri Oct 27, 2017 12:45 am
Forum: Trends in The Periodic Table
Topic: 2.71
Replies: 1
Views: 184

2.71

Can someone please explain what diagonal relationships are? And provide examples to help me visualize them, if possible.
by Glendy Gonzalez 1A
Sun Oct 22, 2017 1:42 pm
Forum: Photoelectric Effect
Topic: Post Module #24
Replies: 3
Views: 208

Re: Post Module #24

The answer is Ultraviolet light. I think that one of the reason is because ultraviolet light has a relatively small wavelength, which results in high frequency. As we have learned, high frequency results in high energy. Therefore, more electrons were able to be transmitted under ultraviolet light. D...
by Glendy Gonzalez 1A
Sun Oct 22, 2017 1:15 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Cartesian axes [ENDORSED]
Replies: 2
Views: 197

Cartesian axes [ENDORSED]

Can someone please explain Cartesian axes and how can the orientation of orbitals be described using this term, please?
Thank you
by Glendy Gonzalez 1A
Sun Oct 15, 2017 10:40 pm
Forum: Properties of Light
Topic: Speed of Light Constant
Replies: 18
Views: 713

Re: Speed of Light Constant

I think any of these two values will be okay. Using 3.00*10^8 will only give you easier values to work with.
by Glendy Gonzalez 1A
Tue Oct 10, 2017 5:35 pm
Forum: Properties of Light
Topic: Chapter 1 #3
Replies: 9
Views: 409

Chapter 1 #3

Can someone please explain what happens when the frequency of electromagnetic radiation decreases?
Based on the textbook, the answer is (c). the extent of the change in the electrical field at a given point decreases. But I don't know why or how to explain it.

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