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Consider the superposition wave function



Psi x=Csin(πx/a)+d sin(2πx/a)



Is psi x an acceptable wave function for the particle in a box?

a solution of 3.80 g of CH3COOH in 80.0 g C6H6 has a freezing point of 3.50°C. calculate molar mass of the solute (CH3COOH). the normal freezing point of pure benzene is 5.50°C

 What is the unique proanthocyanidin in cranberry? What unique biological activity it processes that led us to be interested in it? Cranberry processes this activity but not other berries like blueberry or strawberry. What could be the reason?


a.      Cisplatin or Platinol has a chemical PtCl2(NH3)2 that is used in the treatment of certain cancers. Calculate (a) the amount (mol) of compound in 285.3 g of cisplatin; (b) the number of hydrogen atoms in 0.98 mol of cisplatin.



Isoflavones are weaker antioxidants than anthocyanidins. What could be the reason?


2g of NaOH is dissolved in 500dm³ of solvent.what is the molar concentration of the solution?

At 25°C and and oxygen pressure of 1.000 atm, the molar solubility of O2 (g) is 2.18x10^-3 M. What is the molar solubility of O2 (g) in a saturated water solution at the same temperature when the oxygen pressure is 0.2095 atm?

In an experiment of soap, after being dissolved 10 gr Triglyceride in ethyl alcohol, it is reacted with 25 ml of 5 M NaOH solution by stirring until boiling. Then, the reaction is filtered and cooled. After being waited in the oven overnight, the precipitation is weighted, and the obtained amount is nearly 9 gr. (Triglyceride molecular mass: 885.4 g/mol, Soap:306 g/mol)

a.) Calculate theoretical amount of soap

 

 

b. Find percentage of yield of soap

 

 

c. Calculate % error



The amino acid methionine, which is essential in human diets, has the molecular formula C5H11NO2S. Determine (a) its molecular mass; (b) the number of moles of H atoms per mole of methionine; (c) number of grams of C per mole of methionine; (d) the number of C atoms in 9.07 mol methionine



3. Lead(II) sulfate formed in the reaction of 145 mL of 0.123 M lead(II) nitrate and excess sodium sulfate.


a. Write the balance chemical equation

b. What type of chemical reaction?



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