Calculate the mass of solid NaCH3COO that must be added to 1.0 liter of 0.20 M CH3COOH solution so that the pH of the resulting solution will be 5.00. Assume no volume change due to the addition of solid NaCH3COO. Show your work. 

Which of the following statements about the measurement of pH is incorrect?

Estimate the heat of reaction at 298 K for the reaction shown, given the average bond energies below. Show your work.             Br2(g) + 3F2(g)

Which of the following statements about the measurement of pH is incorrect?

A 50.0 mL solution of 1.2 M HCl at 24.1°C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1°C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8°C. The density of the final solution is 1.05 g/mL. Calculate the molar heat of neutralization. Assume the specific heat of the solution is 4.184 J/g•°C. The heat capacity of the calorimeter is 32.5 J/°C. Show your work. 

Estimate the heat of reaction at 298 K for the reaction shown, given the average bond energies below. Show your work.              Br2(g) + 3F2(g)

Assume the following reaction occurs by the given reaction mechanism.             3H2 + CO  

The rate constant for the first-order reaction below is k = 3.3 × 10−2 min−1 at 57 K. What is the half-life (in minutes) for this reaction at 57 K?            A →  B + C

Which chemical change listed below represents a decrease in entropy?

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