Search found 23 matches

by 104822659
Sat Mar 18, 2017 2:12 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: When to use -cis and -trans?
Replies: 2
Views: 870

When to use -cis and -trans?

When do you use cis and trans?
Is it only when there is a double bond or can a triple bonded molecule have cis/trans?
Also, why is this molecule a trans?
Image

Thanks!
by 104822659
Fri Mar 10, 2017 11:30 am
Forum: *Alkanes
Topic: Naming and Line structure 1.10
Replies: 1
Views: 279

Naming and Line structure 1.10

Give the systematic name for CH3CH2CH(CH3)C(CH3)3 and draw the line structure.

If the question only asked for name, could I use 1-tertbutyl-2-methylbutane? Or would the only name be 2, 2, 3-trimethylpentane?
by 104822659
Sun Mar 05, 2017 4:04 pm
Forum: *Alkanes
Topic: Alkane nomenclature after decane
Replies: 1
Views: 236

Alkane nomenclature after decane

Are we required to know the names of the alkanes after the first ten?
by 104822659
Sun Feb 26, 2017 9:40 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Which electrode to use?
Replies: 2
Views: 365

Which electrode to use?

In the homework, Pt and graphite are used, but are those the only electrodes we need to know? And when do we know which one to use?
by 104822659
Mon Feb 20, 2017 3:12 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Potential Energy Figure 15.31
Replies: 1
Views: 268

Potential Energy Figure 15.31

I'm not what the H-Br distance and the H-H distance are pointing to on the contour graph
by 104822659
Sun Feb 19, 2017 9:25 pm
Forum: Second Order Reactions
Topic: Question 15.81
Replies: 1
Views: 313

Question 15.81

Hi, I'm not understanding the loss and reverse part of the question. If anyone can help, that would be great! The equilibrium constant for the second-order attachment of a substrate to the active site of an enzyme was found to be 326 at 310 K. At the same temperature, the rate constant for the secon...
by 104822659
Wed Feb 15, 2017 2:08 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Dilution and cell potential
Replies: 1
Views: 200

Dilution and cell potential

How will diluting the concentration of the anode increase the cell potential?
by 104822659
Sat Feb 11, 2017 5:47 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Problem 14.15
Replies: 4
Views: 456

Problem 14.15

Write the half-reactions and devise a galvanic cell (write a cell diagram) to study each of the following reactions: (a) AgBr(s)\rightleftharpoons Ag^{+} (aq)+Br^{-}(aq) , a solubility equilibrium (b) H^{+}(aq)+OH^{-}(aq)\rightarrow H_{2}O(l) , the Brø...
by 104822659
Sun Feb 05, 2017 9:21 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Potential and Spontaneous Reactions
Replies: 1
Views: 287

Standard Potential and Spontaneous Reactions

If the standard potential , does that always signify that the reaction is spontaneous?
Does indicate that it is spontaneous in the reverse reaction?
by 104822659
Fri Jan 27, 2017 11:56 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: Entropy and Structure
Replies: 1
Views: 216

Entropy and Structure

How does entropy give a clue about how the substance is structured as a solid? Can we be certain of what orientation a substance will be?
by 104822659
Fri Jan 20, 2017 5:38 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Work of Expansion [ENDORSED]
Replies: 2
Views: 388

Re: Work of Expansion [ENDORSED]

I'm not sure if this anywhere near what answer you were looking for, but .. I think for reactions that happen quickly (at infinitesimal changes), we can use w=-P_{ex}\cdot \bigtriangleup V . For reactions that happen more slowly, we use the integral (which is the cumulative sum of all the w=-P_{ex}\...
by 104822659
Thu Jan 12, 2017 9:53 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law Example 8.9
Replies: 1
Views: 213

Hess's Law Example 8.9

I'm looking over how the book uses Hess's Law on 8.9 and I don't understand how the book got H2O2 for Step 2. Propane, C3H8, is a gas used as a fuel for outdoor grills and alternative-fuel vehicles. The enthalpy change for the synthesis of propane from its elements in their standard states is diffic...
by 104822659
Sat Dec 03, 2016 1:29 pm
Forum: Hybridization
Topic: Hybridized Orbitals with d
Replies: 1
Views: 212

Hybridized Orbitals with d

Is there a difference between dsp^3 and sp^3d?
If the electron arrangement was a pentagonal bipyramidal, what would the hybridization be?
by 104822659
Tue Nov 29, 2016 5:41 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Calculating Bond Order
Replies: 2
Views: 1556

Calculating Bond Order

Can you calculate the bond order without the MO diagram?
How do you calculate the bond order of NO3-?
by 104822659
Tue Nov 29, 2016 2:03 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating pH - Group 1 and Group 7
Replies: 1
Views: 269

Calculating pH - Group 1 and Group 7

Why don't group 1 or group 7 (like Na or Cl) affect pH?
by 104822659
Thu Nov 17, 2016 12:15 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination number?
Replies: 3
Views: 551

Re: Coordination number?

How likely would it be for something to triple bond with a transition metal? If so, would the coordination number still be 1?
by 104822659
Sun Nov 13, 2016 6:41 pm
Forum: Hybridization
Topic: Which Hybrid Orbital
Replies: 6
Views: 623

Re: Which Hybrid Orbital

Is six the highest number of electron density an element can have?
by 104822659
Sat Oct 29, 2016 5:59 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Comparing Moles vs Comparing Reactant and Product
Replies: 1
Views: 635

Comparing Moles vs Comparing Reactant and Product

What is the difference was between comparing the moles of the reactant with another reactant and comparing the moles of the reactant to the product?
by 104822659
Sat Oct 22, 2016 9:41 pm
Forum: Lewis Structures
Topic: Lewis Structure for Perchlorate Ion [ENDORSED]
Replies: 2
Views: 418

Lewis Structure for Perchlorate Ion [ENDORSED]

How can Cl have so many valence electrons and form so many double bonds? I thought they have to abide by the octet rule? Do the shells have anything to do with their structure?
by 104822659
Mon Oct 17, 2016 2:14 pm
Forum: General Science Questions
Topic: Determining reactants given the products [ENDORSED]
Replies: 1
Views: 611

Determining reactants given the products [ENDORSED]

Is there a definite way to determine the reactants if we are given only the products?
by 104822659
Thu Oct 06, 2016 11:18 pm
Forum: Properties of Light
Topic: Atomic Spectra- Question 1.15 [ENDORSED]
Replies: 3
Views: 525

Re: Atomic Spectra- Question 1.15 [ENDORSED]

How did you guys know that n=1 in this problem?
by 104822659
Thu Oct 06, 2016 10:51 pm
Forum: Properties of Light
Topic: Balmer and Lyman Series [ENDORSED]
Replies: 4
Views: 709

Re: Balmer and Lyman Series [ENDORSED]

Hi, I'm having trouble understanding what principle quantum level is and is there an equation where the n can be computed from?
by 104822659
Thu Sep 29, 2016 9:37 pm
Forum: Significant Figures
Topic: All students read this sig fig post [ENDORSED]
Replies: 116
Views: 10570

Re: All students read this sig fig post [ENDORSED]

Does it matter how many significant figures there are after the decimal while adding, multiplying, dividing, etc. ? (or does the number of significant figures of the result matter only?)

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