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The radioactive decay of Tl-206 to Pb-206 has a half-life of 4.20 min. Starting with 3.70 1022 atoms of Tl-206, calculate the number of such atoms left after 38.0 min.
Discuss the importance of economics as it relates to pollution prevention. Supple at least two seperate examples to augment your discussion.
How many mL of a .244 M HCL solution will react with .0235 mole of MgO? The reaction of MgO and HCl is given below.
Use a combination of balanced chemical equations and their K's to calculate the equilibrium constant for the titration of formic acid with NaOH, which you used in the previous question. (Hint: You will need to include the value of Kw at some point..
For the decomposition of solid ammonium chloride into ammonia gas and hydrogen chloride gas Kp = 1.1 x 10-16. Calculate the change in standard free energy for this decomposition reaction.
A reaction has a rate constant of 1.27×10?4 /s at 28 degrees C and 0.226 /s at 78 degrees C. Determine Activation Barrier. What is the value of the rate constant at 16 degrees C?
Imagine that 1.00 mol H2O(l) is placed in a piston with a constant external pressure Pext = 1 bar. The piston is then placed in a large thermal bath at a temperature of 270 K.
In order to obtain a stock solution of 1000 ug/ ml for each of clomipramine hydrochloride and imipramine hydrochloride , how many grames of each compound should be weighed
Determine the mass of lithium hydroxide produced when 0.38 g of lithium nitride reacts with water to make Ammonia (NH3) and Lithium hydroxide.
A gas expands and does P-V work on the surroundings equal to 345 J. At the same time, it absorbs 191 J of heat from the surroundings. Calculate the change in energy of the gas.
Determine ΔSsys separately for the volume and temperature changes and show that ΔSsys=0 for a reversible adiabatic process. Also, if the expansion had instead occurred irreversibly against a constant external pressure of 1 atm
How many moles contain each of the following? 3.75 x 10^24 molecules CO2
50.0 ml of 2.00M H2SO4 react with 75.O ml of 2.00M NaOH.Identify the limiting and excess reactants.
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