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Which of the following is an example of an ionic crystalline solid? Choose one answer. a. calcite, CaCO3 b. fluorite, CaF2 c. iron pyrite, FeS2 d. silver chloride, AgCl e. all of these
A rock contain 3.2 grams of a radioactive isotope, uranium-235, . Determine what was the original amount of uranium-235 in the rock If the rock has undergone 2.75 half lives, and how old is the rock?
what effect does the presence of sodium sulfite group on methyl orange have on the solubility of methyl orange in water. If this group were absent, would you expect the solubility of the resulting molecule to be more or less soluble in hexane than..
Calculate the expectation value for the kinetic energy of the H atom with the electron in 2s orbital. Compare your result with total energy
Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein. Part B: Alizarin yellow R, Ka=7.9x10^-12, is yellow in its protonated form (HX) and red in its ionized form (X-)
What are the procedural difference between the preparation of tin oxide and magnesium oxide
Electrolytes and Molarity, Iii)salt is added to 81.4 g of water? iv) Identify the electrolytes and the non-electrolytes among the following compounds
What is the value of Ksp for Ag2SO4 if 5.40 g is soluble in 1.00 L of water?
What is the osmotic pressure, in atm, of a solution formed by dissolving 17.2 g of AlCl3 in 0.588 L of water at 57.4 oC? (R = 0.0821 L-atm/mol-K; 0 oC = 273 K)
cubic centimeter of rubber is worn off an automobile tire with each revolution of the wheel?
The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transiytion state theor is valid
Glycophorin A is a 131 residue integral membrane protein that contains a single transmembrane alpha helix. If the lipid bilayer has a thickness of 30 A, calculate the number of residues of an alpha helix
the structure of a protein by both NMR and X-ray crystallography and they differ in one region. Which is more likely to be the true structure of the protein when dissolved in solution? Why?
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