CHEMISTRY COMMUNITY

Allison_Eminhizer_3A

Okay thank you!

Allison_Eminhizer_3A

Yes this one was without the solutions, I handed in my workbook so I don't know the exact question but I remember we had to compare the electronegativity of multiple compounds, and I didn't know how to go about an element with a subscript, as in H2S.

Allison_Eminhizer_3A

So when the overall sum of formal charges is equal to zero but individual elements have say a -1 or a +1 or in some way balance eachother out, how do I determine which element should have what charge?

Allison_Eminhizer_3A

Ok so one of the compounds we're being asked to compare is H2S. In order to determine its electronegativity I'm assuming I'd have to double Hydrogens electronegativity, but I don't know that value. Will we be given the value? If not how would I approach that.

Allison_Eminhizer_3A

Oh i had it all wrong omg thankyou now i remember. so do i have to know the exact values of electronegativity and compare or can i determine which is greater through the trend

Allison_Eminhizer_3A

So it says circle the compound with greater "ionic character"
And my notes have trends for both ionic radii and ionization energy.
which trend does ionic character refer to? or how do i figure that out

Allison_Eminhizer_3A

Ok it is helpful thankyou very much!

Allison_Eminhizer_3A

Where could I find the contact of a chem tutor?

Allison_Eminhizer_3A

Given is Copper(II)Sulfate . 5water I'd type out the formula but I'm not sure how to do subscripts My first question is why there is a period between copper(II)sulfate and water, I don't know what to make of it or if its just a typo? The rest of the problem is determine the mass of Copper(II)Sulfate...

Allison_Eminhizer_3A

Okay that helps thank you!

Allison_Eminhizer_3A

The question I'm stuck on asks for the lowest frequency of light that will cause photoelectric emission, and then the maximum energy of the electrons emitted. The wording is confusing me, does this involve an inequality?

Allison_Eminhizer_3A

Marco_Romo_1I wrote:Yes that is correct. So delta P is 4.02 X 0.2.

Where does the 4.02 come from?

Allison_Eminhizer_3A

Okay Thankyou!

Allison_Eminhizer_3A

Hi, for #3 I converted megahertz to hertz for the given energy amount, and I was going to use E=hv and then c= lambda v
But h= 6.626 x 10^-34 J/s
And my energy is 9.95 x 10^7 Hz
My point is they're different units
Can I still find v in E= hv?
Or do I need to do some kind of conversion

Allison_Eminhizer_3A

Would anyone in Hedrick Hall like to study tonight?

Allison_Eminhizer_3A

My Highschool chemistry teacher taught us to balance this way, its the lengthy method but I prefer it to trying to balance in my head. https://video.search.yahoo.com/yhs/search;_ylt=AwrTccttqexXinYAC1APxQt.?p=balancing+equations&fr=yhs-Lkry-SF01&fr2=piv-web&hspart=Lkry&hsimp=yhs-SF01...

CHEMISTRY COMMUNITY

Search found 16 matches

Re: Quiz 2 Question 1 Wording [ENDORSED]

Re: Quiz 2 Question 1

Formal Charge for Indivual Elements in Compound

Quiz 2 Question 1

Re: Quiz 2 Question 1 Wording [ENDORSED]

Quiz 2 Question 1 Wording [ENDORSED]

Re: Tutoring? [ENDORSED]

Tutoring? [ENDORSED]

Workbook Page 11 Number 5

Re: Question Wording on Photoelectric Effect

Question Wording on Photoelectric Effect

Re: Quiz 1 prep #5 question [ENDORSED]

Re: Quiz 1 number 3

Quiz 1 number 3

Hedrick Hall

Balancing Equations Video [ENDORSED]