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The first order decay of radon has a half-life of 3 days. How many grams of radon remain after 7.22 days if the sample initially weighs 250.0 grams?
Tris is widely used in a biochemical laboratory. Its acid dissociation constant is 8.32x10^-9. You have available at your lab bench a 0.1M solution of Tris in its protonated form, 0.1M solution of HCl and NaOH,
What is the molarity of a solution that contains 75.0g of KNO3 dissolved in 0.350L of solution
The reaction that occurs here is the reaction of iodide ions with peroxydisulfate ions to produce iodine molecules and sulfate ions. Write the balanced net ionic equation for this reaction.
Write down the reactions that occurred in each test tube if no reaction occurred then put NR on the product side Test tube.
27.5 grams of hydrogen chloride is dissolved into 70.0 ml of water. Calculate the mole fraction for the hydrogen chloride that is dissolved in the water.
In an adiabatic compression if one mole of an ideal gas with a Cv=5R/2, the temperature rises from 293 K to 325 K. Calculate the heat, work, change in enthalpy and change in internal energy
An empty vial weights 31.45 g. If the vial weighs 179.56 g when filled with liquid mercury (d=13.53g/cm3), what is its volume
What are the conditions where Nucleophilic Substitution will predominate over elinmation? ALSO What are the conditions of solvent, temperature
Which of the following organic halides will undergo an E2 elimination on heating with potassium hydroxide in ethanol? a. 2,2-dimethyl-1-bromopropane b. 2,2-dimethyl-1-bromocyclohexane c. benzyl chloride (C6H5CH2Cl)
Why is the dissolving of salt sometimes an exothermic and sometimes an exothermic process
Choose any one chemical process industry, and describe various types of reactors used in that Industry. Diagrams and neat flow sheets may be included wherever they are relevant The student should critically anlyse the use of a particular type of r..
Consider the possible reaction when stoichiometric amounts of solutions of Ba(OH)2(aq) and Al2(SO4)3(aq) are mixed. The products of the reaction are
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