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Compute the wavelength of light necessary to excite the lone electron of a He+ ion from a 3p to a 6f orbital
Define the acid dissociation for a weak acid HX at 25 degrees is 1.80 x 10-5. Compute the free energy of formation for X-(aq) at 25 degrees C. The standard free energies of HX (aq) as well as H+ (aq) at 25 degrees C are -121.5 kJ/mol and 0 respect..
Poly(propylene) is made of one kind of monomer. Give the two monomers used to make nylon 6,6. Why are two monomers needed to make nylon 6,6 while only one is needed to make poly(propylene)?
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 150.00 pm.
which one of the following represents the best method for the preparation of 3-chloro-3 ethylpentane?
1. the problem below concern cacl2.a. 0.135 gram of cacl2 is dissolved to 250 ml. what is the prepared molarity of the
question a patient receives 200ml of a 3.0 mv amino acid solution twice a day. express answer in 2 significant
Nalorphine (C19H21NO3), a relative morphine, is used to combat withdrawl symptoms in narcotics users. How many grams of a 0.0036 molality aqueous solution of nalorphine are needed to obtain a dose of 2.51mg
6Na+Fe2O3->3Na2O+ 2Fe. If you are provided 20.0 moles of sodium & excess iron (III) oxide, how many moles of iron would form?
If 29.10 mL of a 0.145 M nitric acid is required to neutralize 50.00 mL of barium hydroxide solution, what is the molar concentration of the base?
A smple of mixture of NaCl, Caco3 and SiO2 weighed 7.30 grams. During the water wash the sample lost 2.21 grams. After treatment with HCL, the sample weighed 2.05 grams.
6Li(s) + N2(g)------ 2Li3N(s) a, What is theortically yield of Li3N in gram when 12.1gm of Li is heated with 33 gm of N2? b, If actual yield of Li3N is 6.09g what is the percent yield of reaction
Assume three significant figures and an average wavelength of 504 nm for solar radiation. A green leaf has a surface area of 2.00 cm^2
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