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Which statement is false concerning nuclear fission? 1) Absorption of a neutron by a U-235 nucleus will release at least one neutron. 2) If sufficient U-235 is present, the release of the neutrons will set up a chain reaction. 3) Reaction rates will be affected by pressure, temperature and catalysts just like chemical reactions 4) A large nuclei is broken down to smaller ones.
Describe the preparation of 12 mL of a 0.050 M solution of each of the halogens, using the reactions in the preceding question. Available to you are solid Ca(OCl)2
Assume the total heat capacity of the air C air=30 J/K. Describe what's the likely ice will ne after the system reaches equilibrium. b) Estimate theliekly final temperature after reaching equilibrium
During the discharge of an alkaline battery, 4.30 g of Zn are consumed at the anode of the battery. What mass of MnO_2 is reduced at the cathode during this discharge? (in g) also How many coulombs of electrical charge are transferred from Zn to M..
Solid ammonium chloride, NH4CI reacts with solid sodium hydroxide to produce ammonia gas, water and sodium chloride NaCl
During studies of the reaction below, 2 N2H4(l) + N2O4(l) ? 3 N2(g) + 4 H2O(g) a chemical engineer measured a less-than-expected yield of N2 and discovered that the following side reaction occurs
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density
Vanillin is the substance whose aroma the human nose detects in the smallest amount. The threshold limit is 2.0 x 10^-11 g per liter of air. If the current price of 50.0 g of vanillin is $103 determine the cost to supply enough vanillin so that th..
The activation energy of the orginal pathway is 106 KJ/mol. What is the activation energy of the new pathway, all other factors being equal?
Explain in some detail-consider solvent, nucleophile, and substrate structure. Provide the appropriate mechanism for the reaction of bromocyclopentane in sodium iodide /acetone. 2. Why do the reactions in NaI /acetone go to completion
The freezing point of benzene is 5.5oC. What is the freezing point depression of a solution of 5.00 g naphthalene (C10H8) in 444 g benzene (Kf of benzene = 4.90oC/m)?
This reaction is a catalytic hydrogenation that only partially reduces an alkyne. Consider whether the hydrogenation
At constant pressure and 25 degrees celcius a sample of gas occupies 4.5 liters. At what temperature will the gas occupy 9.0 liters?
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