H2 + I2 yields 2HI

At the start of the reaction 1 mole of I2 and 1 mole of H2 are put into a 10 liter container. There is no HI present. At the reaction temperature Keq is 64

What is the equilibrium concentrations for H2, I2 and HI?

Would cyclohexanone have 2 or 3 unique hydrogen for H-NMR?

Why are cold solvents preferred during recrystallization and when is recrystallization selected vs other purification techniques?

In some materials the relationship between stress and strain during plastic deformation is given by σ = σ_y+ K(ε − ε_y) ⁿ  where K and n are constants. What is the energy absorbed by the specimen during plastic deformation in a tensile test if the material yields at a strain of ε_y and fails at a strain of ε_f?

How do potassium sorbate and benzoate kill yeasts and molds? Would they impart an off-flavor in food?

Suppose you have an organic sample X that is somewhat soluble in water, even though it is

somewhat more soluble in dichloromethane or ether solvents. But if you do a single

extraction, you get only 60% of your material to transfer from the water to the organic layer.

a) How many “washes” would it take to extract over 90% of your organic material from

the water layer?

b) In this case, would it be better to extract with dichloromethane or with ether?

Assume you changed the solvent to ethyl acetate which has a K_D for caffeine of 10. How much caffeine would you extract after three extractions? Show your work.

Discuss the microstructure of polymers based on the geometrical structure.

1-1Based on the Gibbs free energy of formation of substances listed in the table below, calculate EMF for the following cells:

(i) Zn | Zn²⁺ (1.0 M) || H⁺ (1.0 M) | O₂ (1 atm) | Pt

(ii) Zn | Zn²⁺ (1.0 M) || Cu²⁺ (1.0 M) | Cu

(iii) Pt | H₂(g) (1 atm) | H⁺ (1.0 M) || H⁺ (1.0 M) | O₂ (1 atm) | Pt

_______________________________________________

Substances                               DG_f^o/ kJ mol^-1 (298 K)

_______________________________________________

Zn²⁺(aq)                                  -147.0

ZnO(s)                                     -318.3

Mn²⁺(aq)                                 -228.3

MnO₄^-(aq)                               -447.3

MnO₂(s)                                  -465.2

Mn₂O₃(s)                                 -881.15

OH^-(aq)                                   -157.2

H₂O(l)                                     -237.1

Cu²⁺(aq)                                  +65.52

Cu⁺(aq)                                    +50.0

Fe³⁺(aq)                                   -4.6

Fe²⁺(aq)                                   -78.87

Cr³⁺(aq)                                   -197.05

CrO₄^2-(aq)                               -727.8

Cr₂O₇^2-(aq)                             -1301.2

Ce³⁺(aq)                                  -672.0

Ce⁴⁺(aq)                                  -533.06

Ag⁺(aq)                                   +77.12

AgCl(s)                                   -109.8

Cl^-(aq)                                     -131.3

_______________________________________________

Calculate delta H for the reaction H(g) + Br(g) = HBr(g), given the following information:

H2(g) + Br2(g) = 2HBr(g) delta H = -72 kJ

H2(g) = 2H(g) delta H = +436 kJ

Br2(g)= 2Br(g) delta H = +224 kJ

Which of the following reactions is unique to the process of glycolysis?

            a.         fructose-1,6-bisphosphate ====> glyceraldehyde-3-phosphate +     dihydroxyacetone phosphate

            b.         2-phosphoglycerate =====> 3-phosphoglycerate

            c.         glucose-6-phosphate =====> fructose-6-phosphate

            d.         phosphoenolpyruvate =====> pyruvate

Discuss the IMF of caffeine used in a TLC experiment with 1:1 Hexanes / Ethyl acetate as the solvent system and explain why the polarity of caffeine is high or low in this solvent?

At 500 °C, cyclopropane (C3H6) rearranges to propene (CH3CH=CH2):

C3H6 (g) ------> CH3CH=CH2 (g)

The reaction is first order and the rate constant is 6.7 x 10-4 s-1. (a) What is the rate law for the reaction, and; (b) if the initial concentration of C3H6 is 0.100 M, what is the concentration of cyclopropane of after 20 min?

3. Butadiene (C4H6) reacts with itself at 250 °C to form a dimer with the formula C8H12.

2 C4H6 (g) ----> C₈H₁₂ (l)

The reaction is second order in C4H6. (a) What is the rate law for the reaction, and; (b) if the rate constant is 4.0 x 10-2 M-1.s-1, and the initial concentration of C₄H₆ is 0.200 M, how long will it take for the concentration of C4H6 to reach 0.04 M?

4.         a) In Q. 2 above what is the half life for the reaction and what is concentration of C₃H₆ after 3 half-lives b) In Q. 3 above how long are the first and second half-lives?

help with question 2, 3 and 4. i already did them, i just want to compared answers so please show steps.

Complete the definitions

chirality

litmus neutrality

insoluble complexes

oxidation of methyl ketones

hemiacetals

acetals

hemiketals

ketals

hydrolysis of ketals

Alginate and Calcium Chloride make spheres possible through spherification.
Can you explain this process and talk about how the concentration, dropping height, and rate matters?
I'll appreciate as many details as you can say :D

Also, I'm curious to know if there is an alternative to create this spheres with other reactants.

Thank you so much!