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Determine the equilibrium constant for the system 2A 3B. At equilibrium, the concentrations are shown here: [A] = 9.43 x 10-2 M, [B] = 1.41 x
10-2 M
3.15 x 10-4
3.17 x 103
4.74
0.0224
0.0317
Calculate the pH of a solution prepared by mixing 10.0 mL of 0.500 M NaOH and 20.0 mL of 1.50 M benzoic acid solution. (Benzoic acid is monoprotic: it's ionization constant is 6.7 x 10-5)
A chemistry student needs 40.0 mL of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of pentane is 0.626 g cm^3. Calculate the mass of pentane the student should weigh out.
A 0.140-mole quantity of M(NO3)2 is added to a liter of 1.030 M NaCN solution. What is the concentration of M2 ions at equilibrium?
there is no measurable difference between final and initial pH - that is why it is called a buffer E. final pH is 0.16 pH units lower than original pH
calculate the pH of a soluion created by mixing 389.5 mL of .182 M HC4H7O2,
Determine an expression for the rate of decomposition in terms of elementary reaction rate constants and reactant and productconcentrations. What is the reaction order with respect toethylene epoxide
Suppose a bone from an ancient human contains 17.5% of the {rm C}-14 found in living organisms. How old is the bone?
use average bond energies to estimate the energy change in kjmol for the reaction all bonds are single bonds except as
Calculate the pH of a solution formed by mixing 5.00 mL of 0.015 M HBr with 20.0 mL of 0.200 M HCL.
Heat evolved per mole of Mg 6) Change in enthalpy for the following specific reaction. Be sure to indicate the correct sign (- or +) for the change in enthalpy. Mg(s) + 2H(aq)===>Mg(aq)+H2(g)
If you stacked Avogadro's number of pennies one on top of the other on Earth's surface, how far would the stack extend (in km). [For comparison, the sun is about 150 million km from Earth and the nearest star (Proxima Centauri) is about 40 trillio..
What are the various uses of radioactivity in healthcare? What are the future trends in healthcare with respect to the use of radioactivity?
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