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Calculate the pH of the buffer after the addition of 0.15 mL of 6M HCl based on the known value of Ka for acetic acid
A metal sample weighing 124.10 g and at a temperature of 99.3 C was placed in 42.87 g of water in a calorimeter at 23.9 C. At equilibrium the temperature of the water and metal was 41.6 C.
calculate the equilibrium partial pressures of all gases in the reaction and set up the expression for Kp in terms of equilibrium partial pressures but do NOT solve.
Ethanol (C2H5OH) melts at -114 °C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively.
Calculate the planar densities in ions per square nanometer on the (1 1 1) and (1 1 0) planes for (a) NiO and (b) NaCl. Ionic radii are Ni2+ = 0.078 nm and O2-=0.132nm, Na+=0.098nm, and Cl-=0.181nm
When a 3.00-g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of 2.472 kJ·K-1, the temperature decreases by 0.280 K. Calculate the molar heat of solution of KCl in kJ/mol
The well-preserved remains of a now extinct woolly mammoth is entombed in the permafrost lands of Siberia. Scientists have conducted carbon dating experiments on plant debris found in the stomachs of this mammoth.
Classify the following salt solution as neutral acidic or basic. Explain and use quilibrium value constants
A balloon filled with 39.1 mol helium has a volume of 876 L at 0.0 C and 1.00 atm pressure. The temperature of the balloon is increased to 38.0 C as it expands to a volume of 998 L, the pressure remaining constant.
added 5 mL of 0.10 M H2SO4 instead of 5mL 0.10 M of HCl calculate the ph of the solution using henderson-hasselbalch
50mL of .250M sodium benzoate, NaC7H5O2, is being titrated by .200M HBr. Calculate the pH of the solution
How many kJ of energy are required to convert 747 grams of water (liquid) at 23.4°C to steam at 100°C? The following information is given for H2O:
A beaker containing 250 mL of a 0.500 M solution of acetic acid COOH) is added to 125 mL of a 0.850 M solution of sodium carbonate. The reaction that ensues produces carbon dioxide, sodium acetate COONa), and water. How many grams of carbon dioxid..
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