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The Flask Apparatus contains 2.00 L of H2 at a pressure of 346 torr and 1.00 L of N2 at an unknown pressure. If the total pressure in the flasks is 306 torr after the stopcock is opened, determine the intial pressure of N2 in the 1.00 L flask?
For the formation of a photchromic imine you use ammonium bromide. Give 2 reasons why you cannot use concentrated HBr.
Carboxypeptidase A is an exopeptidase, which means that it only cleaves the C-terminal residue from a polypeptide chain. Why is only the C-terminal residue cleaved, and no cleavage in the chain?
A cylinder with a piston contains 897 ml of dry oxygen at a pressure of 582 mm Hg and a temperature of 327 K. If the temperature is reduced to 286 K and the pressure increased to 628 mm Hg what is the new volume ?
What is the second step in the scientific method? 1-to analyze the data, and create a theory to confirm the experimental observations 2- to analyze the data, and propose a tentative hypothesis to explain the experimental observations.
The vapor above a mixture of pentane and hexane at room temperature contains 35.5 pentane by mass. What is the mass percent composition of the solution
compound of carbon and oxygen contains 3.00g of carbon and 8.00g of oxygen, what is the mass percent of carbon in the compound?
Calculate the lattice energy of Na2O for the following data: Ionization energy of Na(g):::495kj/mol, Electron affenity of O(g) for 2e-:::603 kj/mol
An inorganic chemist who studies the reactions of phosphorus halides mixes 0.105 mol of PCl5 with 0.045 mol of Cl2 and 0.045 mol of PCl3 in a 500-mL flask at 250oC .
The half life of Uranium-238 is 4.5 x 10^9 yr. A sample of rock of mass 1.6 g is found to produce 29 dis/s. Assuming all the radioactivity is due to Uranium 238, find the percent by mass of Uranium 238 in the rock.
What is the pH of a saturated solution of Ba(OH)2 at 25oC? For Ba(OH)2, Ksp=5.0x10-3.
Total pressure in kPa 10 seconds after initiation of the reaction if initially there was 88.3kPa of pure N 2 O 5 vapor Enter the total pressure in kPa 10 minutes after initiation of the reaction.
Calculate the lattice energy for LiF(s) given the following; sublimation energy for Li(s) +166KJ/mol, ?Hf for F(g) +77KJ/mol, first ionization energy of Li(g) +520KJ/mol, electron affinity of F(g) -328KJ/mol, enthalpy of formation of LiF(s) -617KJ..
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