A community for students.
Here's the question you clicked on:
 0 viewing
raffle_snaffle
 one year ago
The dipole moment (μ) of HBr (a polar covalent molecule) is 0.797D (debye), and its percent ionic character is 11.8 % . Estimate the bond length of the H−Br bond in picometers.
Note that
1 D=3.34×10−30 C⋅m and
in a bond with 100% ionic character, Q=1.6×10−19 C.
raffle_snaffle
 one year ago
The dipole moment (μ) of HBr (a polar covalent molecule) is 0.797D (debye), and its percent ionic character is 11.8 % . Estimate the bond length of the H−Br bond in picometers. Note that 1 D=3.34×10−30 C⋅m and in a bond with 100% ionic character, Q=1.6×10−19 C.

This Question is Closed

Photon336
 one year ago
Best ResponseYou've already chosen the best response.3We will start with this \[\mu = Q*r \]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.3\[\frac{ 0.79 D }{ x } = \frac{ 11 }{ 100 }\] they've already given us the %ionic character which means that we can find easily find the how many Debyes it would be if the molecule had 100% ionic character by setting up a proportion which is 7.18D \[7.18Dybe \] 0.79/7.18 = 11% ionic character. \[Q*r = \mu \] \[\frac{ 1 D}{ 3.34x10^{30} C*m } *(1.60x10^{19})C*r = 7.18D\] I feel that the question gave us the charge, when we had 100% ionic character, so that's why I did it this way, using the charge for that, because we don't know what the charge was when it's 0.79 Dybe's. here i feel that we are estimating the length by assuming 100% ionic character, and then figuring out what the length is. \[\frac{ (7.18D)(3.34x10^{30}) C*m }{ (1.60x10^{19})C*D } = 1.50x10^{10} m\] \[\frac{ 1.50x10^{10}m }{ 1x10^{10} m} = 1.5 Angstroms\]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.3To confirm and justify my answer these were some bond lengths i found as well as the dipole moment of HBR, in Dybes "HBr 1.41 bond length 0.82 dipole moment"

raffle_snaffle
 one year ago
Best ResponseYou've already chosen the best response.1For some reason the answer is wrong. Is that to the correct sig figs?

Photon336
 one year ago
Best ResponseYou've already chosen the best response.3Yeah, I didn't take significant figures into account

Photon336
 one year ago
Best ResponseYou've already chosen the best response.3I'm guessing the answer has 3 significant figures.

raffle_snaffle
 one year ago
Best ResponseYou've already chosen the best response.1Hey thanks for your help.

raffle_snaffle
 one year ago
Best ResponseYou've already chosen the best response.1oops I was suppose to convert to picometers haha my bad... That is what it asks for.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.