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The half-life of plutonium-239 is 24 110 yrs. Of an original mass of 100.g, how much plutonium-239 remains after 96 440 yrs?
Description of Chemistry - Other, What is meant by Molality of a solution and Solute particles? Define. How many solute particles are there in 1m solution containing these substances in one kg of water?
Draw the crystal-field energy level diagram for the 3d obitals and show the placement of d electrons assuming this is a weak-field complex ion.
calculate the amount of energy as heat by the freezing of 13.3 g of a liquid substance. given that the substance has a molar mass of 82.9g/mol and a molar enthalpy of fusion of 4.60 kj/mol.
Sodium borohydride reacts very slowly with ethanol to evolve a gas. Write a balanced equation for this reaction.
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 2+ in aqueous NaCN. You can assume sodium is a secator ion and does not need
How many kilojoules of heat are absorbed when 40.6 of mgo is decomposed into mg and O2 at constant pressure
Determine the ratio of the work delivered by the turbine to the work consumed by the pump. Assume the entire cycle to be reversible and the heat losses from the pump and the turbine to be negligible.
You are a hazmat responder and walk into what appears to be a meth lab. There are flasks of iodine, White Gas fuel, Sodium Hydroxide, Nitric Acid, and a box of ephidrine.
Nitrogen oxide is a pollutant in the lower atmosphere that irritates the eyes and lungs and leads to the formation of acid rain. Nitrogen oxide forms naturally in atmosphere according to the endothermic reaction: N2+O2=2NO(g) Kp= 4.1x10^-31 at 298..
Calculate the molar solubility of Cu(OH)2, Ksp = 2.2 × 10-20, in 0.82 M NH3. Don't forget to use the complexation reaction Cu2+ + 4 NH3 ? Cu(NH3)42+, K = 5.0 × 1013.
silica gel columns having smaller particle size procedure more effective chromatographic separations
What is the significance of high pressure used in HPLC?
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