CHEMISTRY COMMUNITY

Anjali_Kumar1F

Thank you!!!

Anjali_Kumar1F

What affects or changes the Activation Energy?

Anjali_Kumar1F

In the Arrhenius Equation, what does the A stand for? What is that?

Anjali_Kumar1F

I can't find it.

Anjali_Kumar1F

It says he will post it 9 am tomorrow morning.

Anjali_Kumar1F

How is a photosynthesis reaction exergonic?

Anjali_Kumar1F

How do you know if it's a first order reaction?

Anjali_Kumar1F

Do you know when Lyndon will post his final review worksheet?

Anjali_Kumar1F

Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.

Anjali_Kumar1F

Can someone help me on number 27 from the 6th edition?

Anjali_Kumar1F

What does it mean if Kinetics is controlling a reaction?

Anjali_Kumar1F

Then when do you use OH-?

Anjali_Kumar1F

Yeah I would just be familiar with it just in case.

Anjali_Kumar1F

Can someone help me on 14.5 on the 6th edition? I don't get how or where to add H2O to the equation.

Anjali_Kumar1F

If enthalpy is given do we automatically assume the reaction is at constant pressure.

Anjali_Kumar1F

All isothermal reactions have delta U=0 and all constant pressure w=0.

Anjali_Kumar1F

Is there answer where it shows the work for these worksheets.

Anjali_Kumar1F

How do you find delta H.

Anjali_Kumar1F

What is reversible and irreversible expansion can some explain this to me.

Anjali_Kumar1F

When is Lyndon going to post his midterm review ws??

Anjali_Kumar1F

Why aren't all exothermic reaction spontaneous?

Anjali_Kumar1F

Look at the outlines posted on his website it tells what chapters do need to know.

Anjali_Kumar1F

Why do we have to use integrals to find constant pressure?

Anjali_Kumar1F

What is the standard enthalpy of formation?

Anjali_Kumar1F

In the lecture, he said that since reactants and product can be different states and reactions can occur at different pressure, the enthalpy of a reaction can be different.

Anjali_Kumar1F

What is state property and what does it mean when enthalpy is state property.

Anjali_Kumar1F

so if it is <10^-3 you take out the x in the denominator

Anjali_Kumar1F

Can you make an ICE table for partial pressure or is just used for concentration?

Anjali_Kumar1F

Can someone help me with 11.41 from 6th edition

Anjali_Kumar1F

What is quotient and what is the difference between quotient and K if they are calculated the same way.

Anjali_Kumar1F

Does temperature change or affect the concentration(K) and why?

Anjali_Kumar1F

Can someone help me with 11.33 from the 6th edition tb. I keep on getting 69.4 instead of 6.9.

Anjali_Kumar1F

Why is London Disperse Force in every bond?

Anjali_Kumar1F

What is the function of cisplatin?

Anjali_Kumar1F

Why is it when there is more oxygen then the bond is more acidic?

Anjali_Kumar1F

Do we need to know the biological importance for the final?

Anjali_Kumar1F

How do you know HCN is polar or non polar?

Anjali_Kumar1F

What was he saying about the bis, tris and all when are we supposed to use that?

Anjali_Kumar1F

What is the difference between square planar and tetrahedral?

Anjali_Kumar1F

What is the difference between square planar and tetrahedral?

Anjali_Kumar1F

What is the steric number and why is it important?

Anjali_Kumar1F

how do you know if a bond is polar or non polar?

Anjali_Kumar1F

So lower repulsion equals higher stability ?

Anjali_Kumar1F

Yeah memorizing will be easier I made flashcards which are pretty helpful.

Anjali_Kumar1F

Do we have to know how to draw each molecular shape for the test or are we just going to be identifying them?

Anjali_Kumar1F

Why is Hydrogen bond shape not 90 degrees but 109 degrees I didn't understand that part.

Anjali_Kumar1F

How is covalent bond dissociation energy is related to covalent bond multiplicity, atomic radius,
and the presence of unpaired electrons? Can someone explain in detail.

Anjali_Kumar1F

What is Induced dipole?

Anjali_Kumar1F

How would I solve this? Potassium permanganate, KMnO4, is an inorganic chemical compound used for cleaning wounds. 5.00 g of KMnO4 is dissolved in a 150.00 mL flask of water. If 20.00 mL of this solution is removed and placed in a new 2nd 250.00 mL flask and filled with water, what is the concentrat...

Anjali_Kumar1F

How did you identify O2 is limiting reactant is it because 31.7 is less than 37.2. The smaller number is limiting reactant?

Anjali_Kumar1F

How do you know if the spin is up or down?

Anjali_Kumar1F

Yeah it doesn't matter where you place them but it needs to be placed symmetrically.

Anjali_Kumar1F

The 4s state is higher in energy than 3d.

Anjali_Kumar1F

whats is work function and how is it solved?

Anjali_Kumar1F

The orbitals s,p,d, f have different sizes and shapes.
- s is spherical shape with 1 orbital
-p has 2 lobes on either side of nucleus with 3 orbitals
-d has 4 lobes of e- located on XY-ZX planes with 5 orbitals
f has more complicated shapes with 7 orbitals

Anjali_Kumar1F

Can someone explain how to do or solve 2.45 from the 6th edition.

Anjali_Kumar1F

In the formula E=hv what does the letter v respresent? I know E is energy and h is a given number which is the constant but what is v.

Anjali_Kumar1F

Can some explain me how to do this question step by step it is from the 6th edition. 1.7 (a) The frequency of violet light is 7.1 x10^14 Hz. What is the wavelength (in nanometers) of violet light? (b) When an electron beam strikes a block of copper, x-rays with a frequency of 2.0 x 10^18 Hz are emit...

Anjali_Kumar1F

Its because that is the ratio. That is a balanced equation and 1 ratio Fe2O3 to 2 Fe because that what the formula is telling us.

Anjali_Kumar1F

What textbook edition 6 or 7?

Anjali_Kumar1F

ok that makes sense!

Anjali_Kumar1F

I am confused on how to do this I though I just divide 25.2g/35g and multiply it by 100. I got 72% but the answer is 76.6%. What are the steps to this problem? Fundamentals M1 Hydrazine, N2H4, is an oily liquid used as a rocket fuel. It can be prepared in water by oxidizing ammonia with hypochlorite...

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