Search found 22 matches

by 604607619
Tue Mar 08, 2016 5:57 pm
Forum: *Alkanes
Topic: Naming Compounds
Replies: 3
Views: 418

Re: Naming Compounds

sorry, i meant to say halogens that come before methyl groups alphabetically take precedence(i.e. bromo, choloro,etc.)
by 604607619
Tue Mar 08, 2016 4:57 pm
Forum: *Alkanes
Topic: Naming Compounds
Replies: 3
Views: 418

Re: Naming Compounds

yes, they do

Armin Ghomeshi
by 604607619
Mon Feb 29, 2016 3:35 pm
Forum: *Nucleophiles
Topic: AX2E2
Replies: 2
Views: 502

Re: AX2E2

i believe it is always bent.
by 604607619
Wed Feb 17, 2016 4:36 pm
Forum: General Rate Laws
Topic: Half-order
Replies: 1
Views: 329

Re: Half-order

yes, the order of reactions do not have to be whole numbers.

Armin Ghomeshi
by 604607619
Tue Feb 09, 2016 10:57 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm 2011 Q5C
Replies: 1
Views: 368

Re: Midterm 2011 Q5C

that is calculated from the question before (5B)

Armin Ghomeshi
by 604607619
Thu Feb 04, 2016 10:25 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Writing cell diagram: figuring out order
Replies: 2
Views: 521

Re: Writing cell diagram: figuring out order

so the order goes anode to cathode. the anode is the molecule being oxidized which silver because it loses an electron. It goes from Ag to Ag+. That is why the cell diagram starts with Ag.


Armin Ghomeshi
by 604607619
Wed Jan 27, 2016 8:35 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Spontaneous Definition
Replies: 1
Views: 334

Re: Spontaneous Definition

yes they are synonyms. that is the reaction will occur with no external force such as a catalyst. A spontaneous reaction occurs when deltaG (Gibb's free energy) is negative.

Armin Ghomeshi
by 604607619
Tue Jan 26, 2016 11:07 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Calculating Enthalpy
Replies: 2
Views: 315

Re: Calculating Enthalpy

It wants the enthalpy of vaporization per mol, that is why you divide by the enthalpy given by .579 mol.
by 604607619
Sat Jan 23, 2016 11:44 pm
Forum: Phase Changes & Related Calculations
Topic: Q8 Quix prep 1 W2014
Replies: 2
Views: 305

Re: Q8 Quix prep 1 W2014

ok so we know entropy has increased since we went from one mole of gas to two moles of gas. Now, we know enthalpy has increased since the cl bonds have been broken and it requires energy to break bonds making it an endothermic process. So since both terms are positive we need the entropy term to dom...
by 604607619
Wed Jan 20, 2016 4:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz #1 Topics
Replies: 4
Views: 646

Re: Quiz #1 Topics

I believe the quiz will only cover up until to what Professor Lavelle covers on friday.

Armin Ghomeshi
by 604607619
Wed Jan 13, 2016 2:09 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Internal Energy Question
Replies: 2
Views: 520

Re: Internal Energy Question

Also, since it is under constant volume there is no work being done, so deltaU=q in this case.
by 604607619
Thu Jan 07, 2016 9:08 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: calculating reaction enthalpy
Replies: 3
Views: 428

Re: calculating reaction enthalpy

I believe only if you have to multiply the entire reaction by the same number (i.e 2,3,etc) in that case you would multiply the enthalpy by the same number.
by 604607619
Tue Dec 01, 2015 2:59 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q vs. K
Replies: 3
Views: 584

Re: Q vs. K

also, K is fixed value and is the same if the reaction is done under the same temperature regardless of how much reactant you start with.
by 604607619
Sat Nov 21, 2015 1:05 pm
Forum: Polyprotic Acids & Bases
Topic: polyprotic acids
Replies: 1
Views: 362

polyprotic acids

Is there a correlation between how many protons an acid can give off and their pH. For example is H3PO4 more acidic than H2SO4?
by 604607619
Wed Nov 11, 2015 9:09 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Fall 2014 Quiz 3 #8
Replies: 1
Views: 266

Re: Fall 2014 Quiz 3 #8

ok so the reactant is a solid so you do not include that in your equilibrium calculation. so your equation is k=P(NH3)*P(H2S). let the products =x. now you have k=x^2, you know k so solve for x and you will have your partial pressures for the products.

Armin Ghomeshi
Discussion 4B
by 604607619
Wed Nov 04, 2015 5:16 pm
Forum: Naming
Topic: Memorization or Logic?
Replies: 2
Views: 413

Re: Memorization or Logic?

you should probably understand why the names are what they are so you can apply them to any other compound. It is similar to lewis structures in that we do not memorize every single one, rather we have a set of rules that we can apply to most compounds to draw their lewis structure.
by 604607619
Fri Oct 30, 2015 4:43 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Polar and Nonpolar bonds
Replies: 1
Views: 199

Re: Polar and Nonpolar bonds

polar bonds have dipole moments and you can determine if there is one from the lewis structure. non polar bonds have dipole moments but the dipole moments cancel each other out so the net dipole moment is 0.
by 604607619
Tue Oct 20, 2015 2:47 pm
Forum: Lewis Structures
Topic: Lewis Dot Structure model
Replies: 4
Views: 457

Re: Lewis Dot Structure model

Also, if you do not have enough valence electrons when using only single bonds, you would then add a double or triple bond to satisfy the number of electrons.

Armin
Discussion 4B
by 604607619
Tue Oct 13, 2015 11:41 pm
Forum: Empirical & Molecular Formulas
Topic: Compounds burned in Air
Replies: 2
Views: 486

Re: Compounds burned in Air

i believe the first question the compound is a hydrocarbon so it only consists of carbon and hydrogen because it doesn't give you the mass of the reactant so there is no way of finding the moles of O. However, the second question gives you the mass of the reactant so you know it is comprised of C,H,...
by 604607619
Wed Oct 07, 2015 4:18 pm
Forum: *Shrodinger Equation
Topic: Electron configuration
Replies: 2
Views: 380

Re: Electron configuration

Hi Rohan,

There are other exceptions to the electron configuration such as silver but I believe Professor Lavelle said we are only responsible for chromium and copper

Armin Ghomeshi; Discussion 4B
by 604607619
Thu Oct 01, 2015 1:22 pm
Forum: Properties of Electrons
Topic: Clarifications on Electrons Changing Energy Levels
Replies: 4
Views: 574

Re: Clarifications on Electrons Changing Energy Levels

Hey renee, So if the energy from the light is not enough to move the electron from n=1 to n=2, then the electron will not be excited and will stay in its ground state (n=1). If the energy required to move an electron is greater than the energy required to move an electron from n=1 to n=2 but less th...
by 604607619
Mon Sep 28, 2015 12:22 am
Forum: Significant Figures
Topic: Common molar masses to remember
Replies: 3
Views: 655

Common molar masses to remember

Hey guys, common molar masses to remember are water=18.02 g/mol, oxygen= 16, carbon 12.011, H=1.008, CO2 = 44.01

I feel like this will save time on quizzes and stuff and also help avoid careless calculation errors

Go to advanced search