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1) Calculate the half-life (in s) of a first-order reaction ifthe concentration of the reactant is 0.0782 M 25.2 s after the reaction starts and is 0.0285 M 56.3 s after the reaction starts.
2) Suppose the half-life is 20.3 s and the reactantconcentration is 0.0776 M 57.8 s after the reaction starts. How many seconds after the start of the reaction does it take for the reactant concentration to decrease to 0.0237 M?
Ammonia is, of course, a base, and S2- is the anion of the weak diprotic acid, H2S. Find the molar solubility of zinc sulfide in: a) pH 9.00 ammonia/ammonium ion buffer with a total NH3/NH4+ concentration of 0.100 M b) The same solution as a but i..
Calculate the radiation dosage (in grays) for an 77-kg person that is exposed for 7.0 seconds to a 3.0 Ci source of beta radiation. Assume that 100% of the radiation is absorbed
What is the electronic geometry of the oxygen atom, O3 ? Answer a. tetrahedral b. triangular planar c. linear d. T-shaped e. angular
Calculate the hydroxide ion concentration in a solution that is 0.068 M morphine C17H19O3N and 0.045 M morphine hydrochloride C17H20O3NCl. Kb of C17H19O3N is 1.6 x 10^-6
What volume of STP of CO2 would be produced by the fermentation of 13.94 of 13.94g of glucose?
Experimental procedure, part A. whats is the procedure for preparing 250 mL of 0.0210 M Na2S2O3 for this experiment from a 100 mL volume of standard 0.106 M Na2S2O3?
A:how many valance electrons does calcium fluorine have. B: what is its empirical formula. c: what is its lewis structure
The equilibrium of Fischer esterification reactions in general is slightly towards product formation. The equilibrium can be made more favorable for product formation by all of the following except
Compare the electron-dot of CH4 and H2O. Why do these molecules have similar bond angels but different names for their shapes
Kc = 9.7 at 900 K for the reaction NH3(g) + H2S(g) --> NH4HS(s) If the initial concentrations of NH3(g) and H2S(g) are 2.0 M, what is the equilibrium concentration of H2S(g)?
There is a one to one relationship between the number of moles of hydrogen gas evolved and the moles of Magnesium metal consumed in the reaction, therefore moles of H2 evolved = moles Mg consumed and the atomic weight of Mg = weight of Mg consumed..
The initial concentrations of the three gases are 0.550 M H2S, .550 M H2, and .275 M S2. Determine the equilibrium concentrations of the gases.
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