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The equilibrium constant K for a certain reaction was measured as a function of temperature (in Kelvin). A plot of ln(K) versus 1/T for this reaction gives a straight line with a slope of 1.352 x 104 K and a y-intercept of -14.51. Determine the value of ?H° for this reaction.
A hypothetical element, Z, has two stable isotopes. Z-38 = 38.012 u 75.68% Z-46 = 45.981 u 24.32% The element's atomic mass would be closest to which of the elements? K, Ar, Ca
considering this homogeneous gas reaction ararr3r that follows second-order kinetics. for a feed rate of 6nbspm3hr of
Compute a wavelength of the yellow light emitted by a sodium lamp if the frequency of the radiation is 5.10*10^-14hz
on a smoggy day in a certain city the ozone concentration was0.50 ppm by volume. calculate the partial pressure of
The titration of a 25 ml sample of 0.110 M HC2H3O2 with 0.130 M NaOH. Determine the following? the initial pH, the volume of added base required to reach the equivalence point
A 30.0 mL sample of a diprotic acid is titrated with 0.255 M KOH. If 59.5 mL of base is required to reach the second equivalence point
the temperature of a metal bar rises by 15 C when it absorbs 4.26 kJ of heat. The mass of the bar is 472g. Determine the specific heat of the metal bar.
Rubidium-87 decays by beta decay with a half-life of 4.9 x 10^10 yr. How many 87Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour
Using resonance contributors, explain why the nitrile group is a deactivator and a meta director in electrophilic aromatic substitution
What is the coefficient of Br- when the following redox equation is correctly balanced. Show the balanced equation. BrO- + Fe(OH)2 > Br- + Fe(OH)3 (basic solution)
A compound is known to have a free amino group with a pKa of 8.8, and one other ionizable group with a pKa between 5 and 7. To 100 mL of a 0.2 M solution of this compound at pH 8.2 was added 40 mL of a solution of 0.2 M hydrochloric acid.
what is the mass in grams of 30.0 mL of the liquid propylene gylcol, a moisturizing agent for foods, which has a density 1.036 g/mL at 25 degree Celsius.
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