CHEMISTRY COMMUNITY

Palmquist_Sierra_2N

Question 5A on the winter 2014 final in the back of our course reader solves for the rate constant at the end but doesn't show how. I understand how to find which order the reaction is and the rate law but not how to find the rate constant with the given information. Please help/explain. Thanks!

Palmquist_Sierra_2N

Im having trouble with this problem on understanding part m) which reactions could be described as kinetically controlled? Could you help explain this, thank you!

Palmquist_Sierra_2N

On my quiz there was the problem asking what is the pseudo-equilibrium constant? It was number 4 on the Wednesday quiz. Does anyone know how we were suppose to solve/calculate for it? Thanks

Palmquist_Sierra_2N

Whats the sluttiest element?
Carbon because it bonds with basically everything

Palmquist_Sierra_2N

when drawing cis and trans on a molecule like that does it matter if you draw off the axial or the equatorial?

Palmquist_Sierra_2N

Palmquist_Sierra_2N

For the first order reaction A-->3B+C, when initial concentration of A = 0.015 mol/L, the concentration of B increases to 0.018 mol/L in 3.0 minutes. a) what is the rate constant for the reaction expressed as the rate of loss of A? b) how much more time would be needed for the concentration of B to ...

Palmquist_Sierra_2N

Express the units for rate constants when the concentrations are in miles per liter and time is in seconds for a) zero-order reactions; b) first-order reactions; c) second- order reactions

Please help explain

Palmquist_Sierra_2N

Suppose that 50 g of H2O(l) at 20 degrees C is mixed with 65 g of H2O(l) at 50 degrees C at a constant pressure in a thermally insulated vessel. Calculate delta S and delta S total for the process.
Please help explain the set up and solving of this problem. Thanks!

Palmquist_Sierra_2N

H+(aq) + Cr2o7(2-)(aq) + C2H5OH(aq)-->Cr(3+)(aq) + C2H4O(aq) + H2O(l)
How do you know the C is being oxidized?

Palmquist_Sierra_2N

Well based on the numbers given in the question your final answer should have two sig figs. Look at the values given, and the one with the least number of sig figs is your reference for how many sig figs your final answer should have

Palmquist_Sierra_2N

Hey! First off, the product side of the reaction should only be CH3OH.
For carbon(C) you have to atomize/ sublime it. You look up C in the (g) form in the chart and see that the enthalpy of formation is 716.68 kJ/mol

Palmquist_Sierra_2N

Do we know how many questions there will be on the quiz?

Palmquist_Sierra_2N

I'm kind of confused with the concept of bond enthalpies.
Estimate the reaction enthalpy for
a) 3 C2H2(g)-->C6H6(g)
b) CH4(g)+4 Cl2(g)-->CCL4(g)+4 HCL(g)

Palmquist_Sierra_2N

This question is asking to determine whether the oxides are acidic, basic, or amphoteric. How exactly do you determine/ figure that out?
a)BaO
b)SO3
c)As2O3
d)Bi2O3

Palmquist_Sierra_2N

The question asks you to draw the Lewis structure for each species and identify if it's a lewis acid or base.
For part c) How do you know that Ag+ is a lewis acid?

Palmquist_Sierra_2N

Whenever x is smaller than 10^-3.
You also know the approximation is okay if x is less than 5% of the initial and you find this by using the formula for % ionization of the acid.

Palmquist_Sierra_2N

For part c) would it just become HCO3, or it would it have a plus sign? Since it starts with a -

Palmquist_Sierra_2N

You can just draw a lewis structure if you wanted. But this is usually referring to drawing out the molecular orbitals and filling in the valence electrons in each level of sigma and pi bonds. For heteronuclear ones just know that the more electronegative component is written lower.

Palmquist_Sierra_2N

What conditions favor SO2(g) production?
2SO3(g) <--> 2SO2(g) +O2(g) H= +198 KJ
Need help understanding, thanks.

Palmquist_Sierra_2N

Can someone just explain what is a cation vs an anion and what is the importance of knowing the cations and anions?

Palmquist_Sierra_2N

State the relative orientations of the following hybrid orbitals:
a) sp^3
b)sp
c) sp^3d^2
d) sp^2

What is the question asking and how do I go about it?

Palmquist_Sierra_2N

Ionization energies usually increase on going from left to right across the periodic table. The ionization energy for oxygen, however, is lower than that of either nitrogen or fluorine. Explain this anomaly.

Palmquist_Sierra_2N

Struggling with the concept of electron configuration. How to do this question with an explanation of how you did it. Thanks.

Which elements are predicted to have the following ground-state electron configurations: a) [Kr] 4d^10 5s^2 5p^4; b) [Ar] 3d^3 4s^2; c) [He]2s^2 2p^2; d) [Rn]7s^2 6d^2

Palmquist_Sierra_2N

I've been told different things so I was wondering what formulas will not be given to us for the quiz? Which formulas and constants do we need to know?

Palmquist_Sierra_2N

Well mass percentage is calculated by the mass of the component over the total mass of the mixture. So if you just think about Nitric Acid you know there is 3 times the number of oxygens to one nitric acid. The higher the mass of the component then the higher its mass percentage will be, so oxygen i...

Palmquist_Sierra_2N

I'm really struggling with understanding molarity problems. Could someone explain how do G.13. To prepare a fertilizer solution, a florist dilutes 1.0 L of 0.20 M NH4NO3 (aq) by adding 3.0 L of water. The florist then adds 100 mL of the dilutes solution to each plant. How many moles of nitrogen atom...

CHEMISTRY COMMUNITY

Search found 27 matches

Q 5A 2014 FINAL

4.40 (m)

Quiz 2 question

Re: Post All Chemistry Jokes Here

Re: Equatorial and axial bonds

Re: Iso, Neo, and Tert

15.29

15.9 [ENDORSED]

9.43

14.1

Re: How to keep track of significant figures?

Re: HW 8.67

Re: Practice Quizes

HW 8.73 (Bond Enthalpies

Re: HW 12.17

12.13

Re: When to use the approximation [ENDORSED]

Re: Chapter 12 Question 1

Re: Question regarding heteronuclear molecular orbitals

Quiz 3 Prep 2014 #6

Cation vs Anion

4.31

Problem 2.81

Chapter 2, Homework Problem 2.45

Formulas need to know? [ENDORSED]

Re: Fundamental F. 3 Part B

Fundamentals G13