CHEMISTRY COMMUNITY

Husnia Safi - 1K

For this question, the shape is tetrahedral, yet the bond angles are not 109.5 but 103 degrees. It said this had something to do with the double bond between phosphorous and oxygen. Can someone please explain this further to me. Thanks!

Husnia Safi - 1K

Why is the answer trigonal planar with 120 degree angles when there are 5 regions of electron density?

Husnia Safi - 1K

So for 4.19 part d, it says that the shape is trigonal planar with bond angles of 95 degrees. I though that trigonal planar had bond angles of 120 degrees. I know this has something to do with the lone pairs but I don't really understand why. Thanks!

Husnia Safi - 1K

In my discussion the molecular shape was discussed and the VSEPR shape. What is the difference? Does it have to do something with the lone pairs?

Husnia Safi - 1K

What is a chelate? what does it have to do with ligands?

Husnia Safi - 1K

Can someone please explain to me the significance of what monodentates, bidentates, tridentates, and hexodentates are?

Husnia Safi - 1K

What does it mean when something has the most covalent character? most ionic character?

Husnia Safi - 1K

This is what I found. Hope it helps. Acid deposition aka Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and ...

Husnia Safi - 1K

It asks to create the lewis structure of H2C(NH2)COOH. Where would I start? How would I set this up?

Husnia Safi - 1K

So my TA mentioned something about when there is a formal charge of a -1 and a +1, a bond can be added to "even it out". Can someone explain to me why this is? Also Im not sure if I remembered this correctly so sorry if what I said is inaccurate.

Husnia Safi - 1K

How do I know when I have found the most stable Lewis structure?

Husnia Safi - 1K

What is the significance of ion-ion, ion-dipole, dipole-dipole, and dipole-induced dipole? What makes these so important? A quick summary would be very helpful as I am pretty confused. Thanks!

Husnia Safi - 1K

Anhydrous calcium chloride, CaCl2, is a salt which is sued increasing water hardness in swimming pools. A solution of CaCl2 is prepared by dissolving 4.00g of salt to 1.00L water. a) what is the concentration of chloride ions for the above solution? b) The above solution diluted with 1.00L of 0.400M...

Husnia Safi - 1K

To prepare a nutrient solution, a nurse dilutes 1.0L of 0.30 M C6H12O6(aq) by adding 4.0L of water. The nurse then adds 100. ml of the diluted solution to an intravenous bag. How many moles of carbon atoms will the IV bag contain?

Husnia Safi - 1K

How many orbitals have l=2 and n=3?
Would I just need to find Ml? so would the answer be 5 since Ml= (-2,-1,0,1,2)?

Husnia Safi - 1K

I understand if for something like P^3+ you would need to remove three electrons from the configuration of neutral P, but what do you do when it is P^3- instead of P^3+?

Husnia Safi - 1K

How much energy would be absorbed by 1.00 mol of molecules absorbing at 3600 cm^-1?
For this question you have to multiple the energy of absorption found in part b of the question, to Avogadro's number. Why do I have to do this?

Husnia Safi - 1K

In this question it is given that absorption occurs at 3600 cm^-1 and asks: what is the energy, in joules, that corresponds to that absorption?
It shows that the equation used is E = (c)(h)(v).
Im just curious as to where this equation came from?

Husnia Safi - 1K

sodium vapor lamps emit yellow light wavelength 589 nm. How much energy is emitted by 5.00 mg of sodium atoms emitting light at this wavelength The solution to this problem says to convert 5 mg of Na to moles, then use that number and convert to Joules. But how would I know to do this by reading the...

Husnia Safi - 1K

In problem 1.23 we have to convert 140.511keV to joules. Should we worry about memorizing this conversion for the test?

Husnia Safi - 1K

There are many other experiments that helped us understand the subatomic world. Describe and explain the implications of: Thompson's cathode ray tube experiments, Milikan's oil drop experiment, Rutherford's platinum foil experiment, and the double slit experiment.

Husnia Safi - 1K

How did the discovery of photoelectric effect the world's understanding of the physics of quantum scale objects?

Husnia Safi - 1K

I need help answering this problem:
The work function for chromium metal is 4.37 eV. What wavelength of radiation must be used to eject electrons with a velocity of 1.5x10^3 km/s?

Husnia Safi - 1K

We were given the equation c= 3.00x10^8m.s^-1 for speed in vacuum. Can someone explain to me what this equation means and what it is for?

Husnia Safi - 1K

Does frequency and wavelength have an inverse relationship? and if so, why?

Husnia Safi - 1K

What is the difference?

Husnia Safi - 1K

Does the number 750 have two sig figs? And would the number 750.01 have 5?

Husnia Safi - 1K

What mass of CO is required to react completely with 25.13 g of Fe2O3 according to the equation:
Fe2O3 + 3CO ----> 2Fe + 3CO2

Husnia Safi - 1K

What mass of oxygen gas, O2, from the air is consumed in the combustion of 702g of octane, C8H18, one of the principal components of gasoline?
2C8H18 + 25O2 ----> 16CO2 + 18H20

Husnia Safi - 1K

When would I need to use Planck's constant?

Husnia Safi - 1K

Hi can someone please give me a simple summary on the significance of the photoelectric effect?

Husnia Safi - 1K

Hi can someone please explain what ratios have to do with finding the limiting reactant. Thanks!

Husnia Safi - 1K

Ok so the rules of sig figs are: 1. Non-zero digits are always significant. (so 3.23 would have 3 sig figs) 2. Any zeros between two significant digits are significant. (202 would have 3 sig figs) 3. A final zero or trailing zeros in the decimal portion only are significant (0.00500 would have only ...

CHEMISTRY COMMUNITY

Search found 33 matches

4.21 partc

4.21 a

4.19 d

Molecular vs. VSEPR shape

Chelate

Ligand terms

Most covalent or ionic character

Re: Acid deposition

3.41 part c

Stable lewis structures

Stable Lewis structures

Significance to the different interactions [ENDORSED]

question 8 week 5

Question 7 week 5

Question 5 from week 5 review

Electron configuration for P^3- [ENDORSED]

1.55 part c

1.55 part b

homework 1.25 part b

converting from keV to joules

week 3 discussion, question 11

Week 3 discussion, question 10

Week 3 discussion, question 6 [ENDORSED]

Speed in vacuum

Frequency and wavelength [ENDORSED]

actual vs. theoretical yield [ENDORSED]

Sig fifs in 750 [ENDORSED]

Review worksheet week 1: question 9 [ENDORSED]

Review worksheet from week 1, question 8 [ENDORSED]

Planck's Constant

Photoelectric effect [ENDORSED]

Limiting Reactant

Re: Sig Figs [ENDORSED]