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A certain first-order reaction (A->products) has a rate constant of 6.60×10-3 s^-1 at 45 C. How many minutes does it take for the concentration of the reactant, [A] , to drop to 6.25 % of the original concentration?
what will be the temperature of the system when equilibrium is established? (sp Heat of H2O(s) = 2.09j/g . c (sp heat of H2O (l) = 4.18 J/g.c) Heat of Fus. of H2O(s)=333j/g
SrCO3 is a sparingly soluble salt. Using the Ksp from the appendix, a) Determine the concentrations Sr2+ and CO32- when SrCO3 is dissolved in pure water ignoring secondary reactions of Sr2+ and CO32-
A glass bottle of normal capacity 250 cm^(3) is filled brim full of water at 20 degrees Celsius. If the bottle and contents are heated at 50 degrees Celsius, how much water spills over?
Six moles of hydrogen gas at 0 degrees C is forced into a steel cylinder with a volume of 200mL. What is the pressure of this gas
Draw the mechanism (showing arrows and each step) of the synthesis of 3-nitrophthalic acid to luminol.
A system is expanded against an external pressure of 2 atm, changing its volume from 10 to 35 L and absorbing 765 J as heat from the surroundings.
Mark all the true statements A.) The value of [R]/[P] is the equilibrium constant B.) The amount of P present will not change. C.) The concentration of [R] is constant. D.) The reaction P--> R no longer takes place
What is the molality of a solution of aluminum nitrate that contains 31.0 g of Al(NO3)3 dissolved in 295.0 g of water? Use molar masses with at least as many significant figures as the data given. What is the molality of each of the ions in soluti..
What volume of concentrated HCl is necessary to completely neutralize the 10 mL of 1.5 M NaOH used
Decide whether or not each of the following metals dissolves in 1 M HCl . For these metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves.
students performed acid-base titrations. Redox reactions can also be used in titrations. An example is the titration of ascorbic acid (H2C6H6O6) in lemon juice using triiodide (I3-). A starch indicator will turn the solution blue-black at the endp..
A sample of sodium reacts completely with 0.497 kg of chlorine, forming 819 g of sodium chloride. What mass of sodium reacted
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