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What is the enthalpy change corresponding to the melting of 2.5 moles of H2O? what is the system? What is the surrounding? In what direction does the heat flow? Is the process endothermic or exothermic?
solution has an osmotic pressure of 3.80torr at 35?C. What is the molar mass of the protein?
MgNH4PO4.6H2O loses H2O stepwise as it is heated. Between 40c and 60 the monohydrate is formed, and above 100 celcius the anhydrous material is formed.What are the phosphorus percentage of the monohydrate and of the anhydrate material?
What mass of H2 forms if 12 grams of Zn reacts with 7 grams of HCl?
Calculate the formula weight of CuSO4 . Use the following atomic weights: Cu is 63.5463 g/mol, S is 32.0666 g/mol, and O is 15.99943 g/mol. Your reported answer should have the correct number of significant figures and units.
consider a .7 L of a buffer composed of 0.4 M HClO and 0.5 NaClO? How many moles of strong base could this buffer withstand?
Gastric juice is made up of substances secreted from parietal cells, chief cells, and mucous-secretig cells. The cells secrete HCl, proteolytic enzyme zymogens, mucin, and intrinsic factor. The pH of gastric juice is acidic, between 1-3.
Suppose the pH of the water is 4.67 and that the concentration of iron(II) in the water is 5.17x 10-5 M, what is the potential of the corrosion reaction under the above conditions at 298 K?
consider the following energy diagram for an enzyme-catalyzed reaction. which step is probably the slowest? chose from the following answer.
Calculate the average kinetic energies of the CH4 and N2 molecules at 286 K and 556 K?
An antacid tablet contraining calcium carbonate as an active ingredient required 9.53 mL or 0.0956 M H2S04 for comlete neutralization.
choose the correct answer for the atom using the periodic chart. Larger atomic or ionic radius, F or F(-)
Rank the following carbonyl-containing compounds in order of reactivity towards nucleophilic attack.From most reactive to least reactive
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