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A flow rate of 1000 kg/h of water at 21.1 C is heated to 110 C when the total pressure is 244.2 kPa in the first stage of a process. In the second stage at the same pressure the water is heated further, until it is all vaporized at its boiling pt. Calculate total enthalpy change in the first stage and in both stages.
What mass of HCl is contained in 30.0ml of a solution solution which is 37.2 mass% HCl has a density of 1.19g/ml.
25.2 mL of qater are placed in a graduated cylinder. A 22.6 g stone is dropped in, and the water level rises to 32.4 mL. Find the stone's density.
You have been provided with a 0.1M aqueous solution of glycine at pH 9.0. Calculate how much (in ml) of 5M NaOH solution that you must add to 1 L of this 0.1M glycine solution in order to bring its pH to exactly 9.80
The specific heat of fat is 0.45 cal/(g C) and the density of fat is 0.94g/cm^3 . How much energy (in calories) is needed to heat 10cm^3 of fat from room temperature (25 C) to its melting point (35 C).
Calculate the diffusion limiting current for the oxidation of an organic compound at an electrode in stagnant solution. Assume 6 electrons are involved in the reaction (n=6). C(org) = 0.01 M, D(org) = 2x10^-5 cm^2/s.
10.00 mL of the final acid solution with excess barium chloride to produce a precipitate of barium sulfate (FW=2.33g/mol). The dry solid weighs 0.397 g.
A compound contain 60.87% carbon, 4.38% hydrogen, and 34.75% oxygen then determine its empirical formula?
What is the pH of the buffer that results when 11 g of NaCH3CO2 is mixed with 85 mL of 1.0 M CH3CO2H and diluted with water to 1.0 L? (Ka of CH3CO2H = 1.8 ´ 10-5)
What differences might you expect in the comparative solubility of each of them in lipids? WHY?
When 0.5000L of a 1.00M solution of Pb(NO3)2 is mixed with and excess of 1.00M solution of KI how many grams fo lead(II) iodide are formed
Hydrogen gas was collected over water in a eudiometer at 25 C when the atmospheric pressure was 752 mm Hg. What was the pressure of the hydrogen gas?
How many atomsof carbon are present in 34.5 grams of caffeine?
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