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Which of these makes the best buffer?

Which one of the following has the highest standard molar entropy, S°, at 25°C?

Radon-220 decays to polonium-216. What particle is emitted?

Using the following data, determine the standard cell potential for the electrochemical cell constructed based on the following unbalanced reaction expression: .Half-reaction                     Standard reduction potential                       −1.662 V                     −0.277 V

All of the following would make basic aqueous solutions EXCEPT

Calculate the pH of a 1.60 M NaCH3CO2 solution. Ka for acetic acid, CH3CO2H, is 1.8 × 10-5.

Calculate the pH of a 0.800 M CH3NH3Cl solution. Kb for methylamine, CH3NH2, is 3.7 × 10-4.

Which is the strongest acid?  

When 10.0 g cholesterol was dissolved in 0.500 kg cyclohexane (C6H12, 84.18 g/mol, Kf = 20.2°C/m, Tf = 6.55°C), the freezing point of the solution was 5.50°C. What is the approximate molar mass of cholesterol?

Nitrogen-13 decays by positron emission to produce