13. Construct energy-level diagrams for both high- and low-spin situations for the d6 electron configuration in (a) an octahedral field; (b) a tetrahedral field.
Please explain if possible...I do understand the orbital principle generally. Thank you.
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Which method, UPS or XPS, is better for resolving chemical shifts and why? Which direction would a peak in a given spectrum move if an atom loses a valence charge? What if the atom gains a valence charge? Does the kinetic energy of the photoelectron depend on the X-ray or UV beam energy?
In: Chemistry
In: Chemistry
Classify each statement as applying to osmosis, dialysis, or both osmosis and dialysis. Be sure to place all statements. Note: If any part of this question is answered incorrectly, a single red X will appear indicating that one or more of the phrases has been placed incorrectly.
-involves the movement of water across a semipermeable membrane
-may be used as a way to seperate small molecules and ions from colloids
-involves the movement of small particles across a semipermeable membrane
-involves the movement of water across a cell membrane.
-can be used medically in artificial kidney machines to remove urea.
In: Chemistry
For the reaction shown, compute the theoretical yield of the
product (in grams) for each of the following initial amounts of
reactants.
Ti(s)+2F2(g)→TiF4(s)
1)7.0 g Ti , 7.0 g F2
Express your answer using two significant figures.
m= ______ g
2) 2.3 g Ti , 1.5 g F2
Express your answer using two significant figures.
m=_______ g
3) 0.236 g Ti , 0.292 g F2
M =_____ g
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In: Chemistry
A 2.32 g sample of a substance suspected of being pure gold is warmed to 71.9 ∘C and submerged into 15.9 g of water initially at 24.9 ∘C. The final temperature of the mixture is 26.7 ∘C.
What is the heat capacity of the unknown substance?
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Consider the following balanced equation Ca3(PO4)2 (s) + 3H2SO4 (aq) -------> 3CaSO4 (s) + 2H3PO4 (aq)
What masses of calcium sulfate and phosphoric acid can be
produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg
concentrated sulfuric acid (98% H2SO4 by
mass)?
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A 2.43 g lead weight, initially at 10.6 ∘C, is submerged in 7.78 g of water at 52.9 ∘C in an insulated container. What is the final temperature of both the weight and the water at thermal equilibrium?
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1. Which of the following slightly soluble substances are more soluble in acidic solution: AgCl AgCN CaF2? Explain why.
2. 50.0 ml of a solution containing 0.010M Pb(NO3)2 is mixed with 50.0 ml of a solution containing 0.10 M NaCl. What will the concentrations of Pb++ and of Cl– be after the mixing? PbCl2 has a Ksp = 1.7 x 10-5 . What is the value of Q for the lead and chloride ions? Will a precipitate form in the mixture? Why or why not.
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| Weak Acid | Ka | Weak Base | Kb |
| CH3COOH (Acetic Acid) | 1.8 X 10-5 | NH3 (Ammonia) | 1.76 X 10-5 |
| C6H5COOH (Benzoic Acid) | 6.5 X 10-5 | C6H5NH2 (Aniline) | 3.9 X 10-10 |
| CH3CH2CH2COOH (Butanoic Acid) | 1.5 X 10-5 | (CH3CH2)2NH (Diethyl amine) | 6.9 X 10-4 |
| HCOOH (Formic Acid) | 1.8 X 10-4 | C5H5N (Pyridine) | 1.7 X 10-9 |
| HBrO (Hypobromous Acid) | 2.8 X 10-9 | CH3CH2NH2 (Ethyl amine) | 5.6 X 10-4 |
| HNO2 (Nitrous Acid) | 4.6 X 10-4 | (CH3)3N (Trimethyl amine) | 6.4 X 10-5 |
| HClO (Hypochlorous Acid) | 2.9 X 10-8 | (CH3)2NH (Dimethyl amine) | 5.4 X 10-4 |
| CH3CH2COOH (Propanoic Acid) | 1.3 X 10-5 | CH3CH2CH2NH2 (Propyl amine | 3.5 X 10-4 |
| HCN (Hydrocyanic Acid) | 4.9 X 10-10 |
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When you titrate 17.2 mL of a 0.14 M solution of (CH3)3N (trimethylamine), it required 17.0 mL of hydrochloric acid solution. Assuming that you have reached the equivalence point, what is the pH of the resulting solution?
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The titration of weak diprotic acid H2A with strong base is conducted. What is the pH of the solution at the following volumes, 0,10,25,50,60,75,100,125,and 150mL if Ka1=1.0x10^-4 and Ka2=3.5x10^-4 and the concentrations for both HA- and OH- are 0.1M?
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A 62.0 mL sample of a 0.122 M potassium sulfate solution is mixed with 36.5 mL of a 0.108 M lead(II) acetate solution and the following precipitation reaction occurs: K2SO4(aq)+Pb(C2H3O2)2(aq)→2KC2H3O2(aq)+PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 0.992 g . Determine the limiting reactant, the theoretical yield, and the percent yield.
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do the equilibruim concentration of the reactants and the products depend on their initial concentration?
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Oxy-myoglobin was measured at wavelength of 417 nm with molar absorptivity of 12,800 M^-1cm^-1. Met-myoglobin was measured at wavelength of 409 nm with molar absorptivity of 17,900 M^-1cm^-1. In 10.0 g of meat (3.0 mL of total solution) the absorbance of oxy-myoglobin was 0.769 using a 1 cm cell and the met-myoglobin was 0.346. Find the moles of oxy-myoglobin and the met-myoglobin per gram of meat.
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Determine the number of possible electron arrangements given the following term:
4D
please show how you determined the answer
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