CHEMISTRY COMMUNITY

Raymond Le 2G

How can you tell a conformation is cis or trans? Is it based on whether the atoms attached to the C on a double bond that have the highest priority are both axial/equatorial?

Raymond Le 2G

Why are diatomic molecules such as Br2 considered electrophiles when they have full valence electrons?

Raymond Le 2G

"Write the full reaction mechanism for the electrophilic addition reaction of hydrogen bromide, HBr, to propene, CH3CHCH2, producing 2-bromopropane, CH3CHBRCH3. Draw the transition states."

Why is it that the H in HBR bonds specifically to the C bonded to two H?

Raymond Le 2G

What is the relation of the value of K to the magnitude of the Activation Energy of a reaction?

Raymond Le 2G

Can the speed of a reaction generally be inferred based on the half-life, or are there many exceptions to this?

Raymond Le 2G

"Write the half-reactions and the balanced equation for the cell reaction for each of the following galvanic cells:
(d) Pt(s)|O2(g)|H+(aq)||OH-(aq)|O2(g)|Pt(s)"

How can you tell that O2 reacts with H+ in its respective half-reaction?

Raymond Le 2G

"If 2.00 mol of an ideal gas at 300. K and 3.00 atm expands isothermally and reversibly from 6.00 L to 18.00 L and has a final pressure of 1.20 atm, what is w, q, and delta U?"

How would one solve this problem?

Raymond Le 2G

Does a higher change in entropy value in a reaction necessarily mean that the reaction is more spontaneous?

Raymond Le 2G

Why is it that when calculating the enthalpy of formation is it "(Sum of Bond Enthalpies of Reactants)" - "(Sum of Bond Enthalpies of Products)" as opposed to the other way around, like it is when calculating the reaction enthalpy when using enthalpy of formation?

Raymond Le 2G

I am confused as to how the answer is -312 kJ/mol instead of +312 kJ/mol. Does this have to do with the given values being delta Hc instead of delta Hf?

Raymond Le 2G

Here is the .mp4 version.

Raymond Le 2G

"For the following reaction, if initially 0.100 mol of H2O (g) is placed in a 4.0 L vessel, what is the equilibrium partial pressures of each reactant and of each product?" H2O (g) + C(s) <-> H2 (g) + CO (g) Kp = 3.72 at 1000 K I'm confused as how the answer came to be PH2O = 0.58 atm PH2 ...

Raymond Le 2G

Do lone pairs of electrons have their own dipole moment?

Raymond Le 2G

How can you tell which plane a bond is in?

Raymond Le 2G

Why is it for these elements and others such as silver that their ground state electron configuration is d10s1 or d5s1?

Raymond Le 2G

Why do waves with higher frequencies have higher intensities? Is frequency proportional to amplitude?

CHEMISTRY COMMUNITY

Search found 16 matches

Cis/Trans for Conformations

Diatomic molecules as electrophiles

Section 4.3 4.28

K and Activation Energy

Half-Lifes

Question 14.11 (d)

Quiz 1 Preparation Winter 2015 #3

Change in Entropy and Spontaneity

Calculating Reaction Enthalpy Using Bond Enthalpies

Problem 8.57

Re: Video: Le Chatelier's Principle and Equilibrium Calculat

#10 from Quiz 3 Prep Fall 2014

Lone pair electrons and dipole moment

Planes

Chromium, Copper, etc.

Frequency and Intensity