Consider the Russell- Saunders coupling scheme for two non-equivalent electrons in an excited 2p1 3d1 configuration. For all parts (a) to (c) give your reasoning:

(a) Show that strong coupling between orbital angular momenta (ℓ ℓ coupling) gives rise to P, D and F terms with L magnitudes of 2½ħ, 6½ħ and 12½ħ.

(b) If coupling between spin momenta (s-s coupling) is considered in addition to ℓ ℓ coupling, what six terms arise?

(c) If coupling between the orbit and spin angular momenta is also considered (LS coupling), how many terms arise?

Draw the internuclear potential as a function of nuclear separation for the ground and excited states of a molecule where the equilibrium separation of the (bound) excited state is smaller than that in the ground state. Draw in the vibrational levels for each state, the electronic transition from the ground vibrational state, and the dissociation energies for each electronic state. What should the spectrum look like?

How is the mass of a compound related to its chemical formula?.....I needed some explanations and examples. thanks

What are the various contributions to the linewidth of an atomic or molecular transition and explain their origin.

1. what are the advantages of breast feeding?

2. when is breast- feeding contraindicated or not allowed?

3. plan a 3 day menu for a pregnant mother. include snacks and drinks.
give justifications of your meal plan.

1. why is proper nutrition critical during pregnancy?

2. comment on the saying that "a pregnant mother eats for two."

3. what are the common diet-related problems during pregnancy?
give suggestions to reduce or control such problems.

0.308 g magnesiumsulphate, that contains crystal water, is dissolved in water, så the total volume is 125.0 mL. To completely precipitate the suflation as barium sulfate in 25.0 mL of this solution, 5.0 mL of 0.050 M barium hydroxide is required.

Calculate how many moles of crystal water are in 1 mole of magnesium sulfate.

I am lost in this one, hope for some help :)

Explain the origin of d-d, metal-to-ligand charge transfer, and ligand-to-metal charge transfer transitions for octahedral metal complexes with appropriate molecular orbital diagrams. Also, comment on the allowance of these transitions using appropriate selection rules.

For the exothermic reaction

PCl3(g)+Cl2(g)?PCl5(g)

Kp = 0.200 at a certain temperature.

A flask is charged with 0.500 atm PCl3 , 0.500 atm Cl2, and 0.300 atm PCl5 at this temperature.

What are the equilibrium partial pressures of PCl3 , Cl2, and PCl5, respectively?

Express your answers numerically in atmospheres with three digits after the decimal point, separated by commas.

You have two aqueous solutions: solution A is 20 mL of 1 M MgSo₄. Solution B a 25 mL of 1.5 M Na₂SO₄.

You take 5 mL of solution A and mix it with 10 mL of solution B.

a. What are the total moles of ions in solution A?

b. What are the total moles of ions in solution B?

c. What are the total moles of ions in solution C?

d. What are the total moles of sulfur atoms in solution A?

e. What are the total moles of sulfur atoms in solution B?

f. What are the total moles of sulfur atoms in solution C?

g. Rate the relative electrical conductivity of these solutions (1=least conductive, 3=most)

it has been said that producing oil is less destructive to the environment than producing coal , explain the reasoning behind the claim ? (type here please in simple language)

Determine the rate constant at 10 degrees C? If a reaction mixture is 0.160 M in C2H5Br, and 0.260 M in OH−, what is the initial rate of the reaction at 85 ∘C ? The kinetics of the following second-order reaction were studied as a function of temperature:
C2H5Br(aq)+OH−(aq)→C2H5OH(l)+Br−(aq)

A 10.010.0 mL sample of whiskey was diluted to 500.0 mL. A 4.004.00 mL aliquot of the diluted sample was removed and the ethanol, C2H5OHC2H5OH , was distilled into 50.00 mL of 0.022500.02250 M K2Cr2O7K2Cr2O7 and oxidized to acetic acid.

3C2H5OH+2Cr2O2−7+16H+⟶4Cr3++3CH3COOH+11H2O3C2H5OH+2Cr2O72−+16H+⟶4Cr3++3CH3COOH+11H2O

The excess Cr2O2−7Cr2O72− was then back titrated with 23.523.5 mL of 0.13300.1330 M Fe2+Fe2+ , producing Cr3+Cr3+ and Fe3+Fe3+ . Calculate the weight per volume percent (% w/v) of ethanol in the original whiskey sample.