Search found 14 matches

by Mariam Ghattas 2L
Sun Jan 24, 2016 8:36 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1120543

Re: Chemistry Jokes

Silver walks up to Gold in a bar and says, "AU, get outta here!"
by Mariam Ghattas 2L
Sat Jan 16, 2016 11:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1120543

Re: Chemistry Jokes

Q: Why did the acid go to the gym?
A: To become a buffer solution!
by Mariam Ghattas 2L
Sun Jan 10, 2016 2:39 am
Forum: Phase Changes & Related Calculations
Topic: Explanation on State Properties
Replies: 2
Views: 406

Re: Explanation on State Properties

an example of something that is not state property: if we have 2 students leaving from CS 50 to go to Ackerman union, they have different routes. a student might go to the financial aid office before the final destination while the other student could go straight to Ackerman. the amount of heat and ...
by Mariam Ghattas 2L
Sun Jan 10, 2016 2:30 am
Forum: Phase Changes & Related Calculations
Topic: Chapter 8 Homework Question 8.37
Replies: 2
Views: 959

Re: Chapter 8 Homework Question 8.37

Yes i believe this will be correct since you are asked about the actual amount of heat required. to be more specific you can write that the answer in terms of per mole. the answer will be 8.22 KJ per mole of CH4(l)
by Mariam Ghattas 2L
Fri Jan 08, 2016 8:20 am
Forum: Phase Changes & Related Calculations
Topic: VE & Endothermic and Exothermic Reactions
Replies: 2
Views: 471

Re: VE & Endothermic and Exothermic Reactions

yes, you are correct if a reaction is exothermic it will have a delta h that is negative which means that the system will be giving off a certain amount of heat to its surroundings
by Mariam Ghattas 2L
Fri Nov 13, 2015 3:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Review video of quiz 2 Fall 2015
Replies: 2
Views: 673

Review video of quiz 2 Fall 2015

I worked on this project with Mieka Mcfarlane lecture 1 Section 1I
by Mariam Ghattas 2L
Sun Oct 18, 2015 5:42 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Using Heisenberg's Uncertainty Principle
Replies: 1
Views: 342

Re: Using Heisenberg's Uncertainty Principle

we usually take into account the spread of the uncertainty. so if something is +/-2 , we need to keep into account a spread of 4. for example if it tells you the velocity is give or take 5m/ sec, we are uncertain about the spread of (10m/s),if the velocity is 10 so it can either be 5 or 15 so we hav...
by Mariam Ghattas 2L
Fri Oct 16, 2015 3:48 pm
Forum: Lewis Structures
Topic: Dots for Lewis Structures
Replies: 2
Views: 1105

Re: Dots for Lewis Structures

for lewis dot structure , it don't think it will matter, but when we are trying to find the shape of the atom. the position of the lone pair will affect the shape of the atom , bond angle and structure in relation to VESPER model
by Mariam Ghattas 2L
Fri Oct 16, 2015 3:36 pm
Forum: *Shrodinger Equation
Topic: Will it be tested on midterm?
Replies: 1
Views: 353

Re: Will it be tested on midterm?

i don't think we will be tested on the Shrodinger Equation, we need to just know the logic behind it , but we will never be asked to compute it Mathematically. i remember in the lecture Dr. Lavelle said that we will never use the equation but we should know that it is related to orbitals and electro...
by Mariam Ghattas 2L
Sat Oct 03, 2015 8:16 pm
Forum: DeBroglie Equation
Topic: Given the energy, calculate the wavelength of y-rays
Replies: 11
Views: 1429

Re: Given the energy, calculate the wavelength of y-rays

you are welcome , I hope my explanation helped :)
by Mariam Ghattas 2L
Fri Oct 02, 2015 9:04 pm
Forum: Properties of Light
Topic: Spectral Lines and Series
Replies: 1
Views: 341

Re: Spectral Lines and Series

The spectra lights show us the amount of energy an electron in a hydrogen atom can absorb/ emit in order to be excited in quantum terms from one energy level to the next for example form n1 to n2 or drop form n2-n1 or n3-n1 Different levels are associated with different energy for example dropping f...
by Mariam Ghattas 2L
Fri Oct 02, 2015 8:43 pm
Forum: SI Units, Unit Conversions
Topic: Grams to Mol
Replies: 3
Views: 860

Re: Grams to Mol

So a mole is just a way of measuring an element so 1 mole of anything is simply 6.022*10^23 atoms of that particular something. You have to keep in mind that some atoms are heavier/lighter than others, for example hydrogen atom with only 1 proton in its atomic weight will be very small in comparison...
by Mariam Ghattas 2L
Fri Oct 02, 2015 8:20 pm
Forum: Properties of Light
Topic: Photons vs Electron equations
Replies: 1
Views: 344

Re: Photons vs Electron equations

For photons you can use anything that doesn't involve mass for example E=h\nu c=\lambda \nu you can even drive both of the equations and combine them depending on what is given in a particular exercise or question \lambda =hc/E E=hc/\nu for electrons we have to use De Broglie \lambda =h/(mass*ve...
by Mariam Ghattas 2L
Fri Oct 02, 2015 8:00 pm
Forum: DeBroglie Equation
Topic: Given the energy, calculate the wavelength of y-rays
Replies: 11
Views: 1429

Re: Given the energy, calculate the wavelength of y-rays

In order for us to calculate the wavelength of the y rays given the the energy we will need to use a combined version of these two equations E=h\nu and c= \lambda \nu 1st step is to look at the information given we are given the energy but it is in KeV units we need to convert that to eV then to jou...

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