Search found 7 matches

by Cindy Ma 1B
Sat Mar 12, 2016 3:59 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Cis and Trans
Replies: 1
Views: 301

Re: Cis and Trans

Cis refers to the orientation of a molecule in which the highest priority groups on either end of the double bond are on the same side. Trans is when the highest priority groups on either end are on opposite sides of the double bond. In the case of the cyclopentene in Q7B, the way to determine wheth...
by Cindy Ma 1B
Sat Mar 12, 2016 3:47 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: EZ naming vs Cis/Trans naming
Replies: 1
Views: 437

Re: EZ naming vs Cis/Trans naming

I don't believe there's any difference between when you would use ZE or cis/trans. The solutions to the past finals all indicate that either answer is fine when naming molecules.
by Cindy Ma 1B
Sun Jan 24, 2016 1:39 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Calculating the heat released (8.31)
Replies: 1
Views: 385

Calculating the heat released (8.31)

The problem I'm unsure about reads:

Calculate the heat released by 5.025 g of Kr (g) at 0.400 atm as it cools from 97.6C to 25.0C at (a) constant pressure and (b) constant volume. Assume that krypton behaves as an ideal gas.

Would you use the equation q=nC(delta)T? And if so, what is C?
by Cindy Ma 1B
Sun Nov 15, 2015 9:42 pm
Forum: Naming
Topic: Iron vs ferrate & oh2
Replies: 3
Views: 600

Re: Iron vs ferrate & oh2

For iron, when it has a positive charge, it would be written as Iron (II) as in [Fe(CN)6]^4- or hexacyanoiron(II).

However when it has a negative charge, it would be written as Ferrate (III) as in sodium bisoxalato(diaqua)ferrate(III).
by Cindy Ma 1B
Sun Oct 18, 2015 4:26 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: electron configuration for Bi^3+
Replies: 1
Views: 6763

electron configuration for Bi^3+

I tried writing out the electron configuration for Bi^3+ and I got
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5s^2 5p^6 5d^10 5f^0 6s^2

but I'm not sure how to write the electron configuration with [Xe]. Is it

[Xe] 4f^14 5s^2 5p^6 5d^10 5f^0 6s^2

or something else?
by Cindy Ma 1B
Sun Oct 18, 2015 4:06 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty
Replies: 1
Views: 332

Re: Uncertainty

We know the electron's position. It should be confined to the radius of that particular atom.
by Cindy Ma 1B
Wed Sep 30, 2015 10:11 pm
Forum: Properties of Light
Topic: 1.3 manipulating light equations
Replies: 3
Views: 613

1.3 manipulating light equations

Which of the following happens when the frequency of electromagnetic radiation decreases? a) The speed of the radiation decreases. b) The wavelength of the radiation decreases. c) The extent of the change in the electrical field at a given point decreases. d) The energy of the radiation increases. ...

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