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Suppose 33mL of 1.20 M HCl is added to 42ML of a solution containing excess sodium hydroxide in a coffee-cup calorimeter. The solution temperature, originally at 25.0 degrees C, rises to 31.8 degrees C.
a) provide a thermochemical equation, including delta H (watch sign)
b) What is the energy (delta H) evolved in kJ per mole of HCl?
For simplicity, assume the heat capacity and the density of the final solution are those of H2O. (Note: in more accurate work, these values are not the same and must be calculated). Also assume that the total volume of the solution equals the sum of the volumes of HCl(aq) and NaOH(aq).
Benzene is a toxic chemical used in the manufacturing of mechanical chemicals. A manufacturer claims that its exit (effluent) water meets the federal regulation standards with a mean of less than 7980 ppm of benzene.
Assume you are an observer standing at a point along a three- lane roadway. All vehicles in lane 1 are traveling at 30 mi/ h, all vehicles in lane 2 are traveling at 45 mi/ h, and all vehicles in lane 3 are traveling at 60 mi/ h.
a the soil profile on a site consisted of 4 m thick homogeneous clay deposit overlying an impermeable rock. the
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Assume the rate constant for BOD decay is 0.2 d^-1, the mean velocity of the stream is 0.5 m s^-1, and the initial concentration is 100 mg L^-1 at x=0. Plot the resulting concentration with downstream distance x in km.
A $125,000 tractor trailer is being depreciated by the Stright Line method over five years to a final Book Value of zero. Half year convention does not apply to this asset, After three years the rig is sold for A
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describe the measurements that would have to be taken and the equations that would have to be used to determine G23, V32, and E2 for a specially orthotropic transversely isotropic material from a single tensile test.
Calculate the water/cement ratio of the cement paste in which all the cement will hydrate to leave no capillary pores. (density of cement: 3.1 g/cm3) ?
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