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A polyatomic ion is composed of C, N, and an unknown element X. The skeletal Lewis structure for this polyatomic ion is [X?C?N]-. If the ion X4+ has the electron configuration [Xe] 4f145d106s2, what is the element X? Knowing the identity of X, write the completed Lewis structure for the polyatomic ion.
A baseball pitcher's fastball is clocked at 100 miles per hour (mph). Calculate the wavelength of a 141 g baseball in nm at this speed.
How much heat (in kJ) is required to warm 13.0 g of ice, initially at -11.0 C, to steam at 111.0 C. The heat capacity of ice is 2.09 J/g C and that of steam is 2.01 J/g C
concentrated sulfuric acid has a concentration of 18 m. how much concentrated sulfuric acid would be needed to make 255
Which one of the following polyprotic acids is the weakest acid in terms of its first acid-ionization equilibrium constant
We know Pro can interrupt an a-helix, chemically, do you think it will cause any unusual problems in the determination of, angiotension II sequences? Explain.
at a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0s. If the initial concentration of N2O5 is 1.0x10^-6 molecules/cm^3, what will be the concentration in molecules/cm^3 after 26.1s
Find the formal concentration of the acid in each phase when 100 mL of 0.10 M aqueous acid is extracted with 35 mL of octanol at (a) pH 4.00 and (b) pH 9.00.
From the understanding of colligative properties, how would I design an experiment to measure the freezing point of a material which freezed at -2'c using the same apparatus used in the laboratory and any chemical reagents commonly found in a chem..
What is the isotopic difference (in per mil) at 25degrees between gas, liquid, and solid phase for the elements carbon and sulfur. Show calculations
The atomic mass of Potassium 39 is 38.96371 AMU. Calculate the binding energy for a mass of this nuclide using 1.008665 AMU for the mass of the neutron, 1.007276 AMU for the mass of the proton, 0.00054858 AMU for the mass of the electron
Use the dipole moments of HF and HCl ( HCl= 1.08 D, HF= 1.82 D) together with the percent ionic character of each bond (HCl 20% ionic, HCl 45% ionic) to estimate the bond length in each molecule.
Give a nanoscale interpretation of the fact that at the melting point the density of solid mercury is greater than the density of liquid mercury, and at the boiling point the density of liquid mercury is great than the density of gaseous mercury.
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