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A sulfuric acid solution is added to scale-forming water to convert calcium carbonate to calcium bicarbonate. Write the chemical equation for this reaction, and calculate the amount of sulfuric acid in milligrams per liter to neutralize 20 mg/l of calcium carbonate.
A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results fromt he trypsinm chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence.
What affect would an increased concentration of 2,3-BPG have on the oxygen-binding curve for hemoglobin. Why would this adaptation be beneficial for functioning well at high altitude?
Calculate the difference in activation energy between disproportionation and combination. At what temperature will termination be 90% by combination
If 60.0 g of H3PO4 is dissolved in enough water to form 175 mL of solution, what is the molarity (M) of the solution
Calculate the entropy change when 100 g of argon is heated and compressed from 300 K, 1.0 atm, to 900 K, 17 atm
If it is Ionic, mention which is the cation and which is the anion. Discuss how the ions formed (gaining or losing electrons and how many). If it is covalent, discuss where the covalent bonds are and draw the structure.
A radiation source has an intensity of 650 rem at 1.0 m, what distance is needed to decrease the intensity of expo- sure to below 25 rem, the level at which no effects are detectable
The mass of Earth is 5.974 ô°€ 1024 kg. Assume that Earth is a sphere of diameter 1.28 ô°€ 104 km and calculate the average density of Earth in g/cm3.
Choose the selection which correctly identifies the forces which must be overcome to convert NH3 from a liquid to a gas. a) Only London dispersion forces must be overcome. b) Only dipole-dipole forces must be overcome
Calculate the molarity of an aqueous NaOH solution if 30.10ml of .500M H2SO4 is required to reach the end point when titrated against 10.00mL of NaOH solution.
Calculate the pH value of solution (a) after 10.0 mL of NH3 solution have been added and (b) after 25.0 mL solution have been added (Ka for NH4+ = 5.6 x 10^(-10).)
What is the persent yield of diethyle ether. b, During the proecess 45% of ethanol that did not produce diethyl ether react by the side reaction. What mass of ethylene is produced
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