Which one of the following is not amphoteric?  

Using the data in the table, which of the conjugate bases below is the weakest base?                

Which transformation could take place at the cathode of an electrochemical cell?  

The concentration of fluoride ions in a saturated solution of barium fluoride is ________ M. The solubility product constant of BaF2 is  

8) For the reaction             2 C4H10 (g) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (g) ΔH° is -125 kJ/mol and ΔS° is +253 J/K ∙ mol. This reaction is ________.  

The rate law of a reaction is rate = k[D][X]. The units of the rate constant are ________.  

HZ is a weak acid. An aqueous solution of HZ is prepared by dissolving 0.020 mol of HZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 4.93 at 25.0 °C. The Ka of HZ is ________.  

The Keq for the equilibrium below is 7.52 × 10-2 at 480.0 °C.               2Cl2 (g) + 2H2O (g)   4HCl (g) + O2 (g)   What is the value of Keq at this temperature for the following reaction?               2HCl (g) + O2 (g) Cl2 (g) + H2O (g)  

Which solution has the greatest buffering capacity?  

Q3. Goodness of fit tests (Use trainData for this question) (12 points) a.i (1 point) State why we cannot perform goodness-of-fit (GOF) tests for model2. ii. (1 point) Describe how we can modify the dataset to enable goodness-of-fit testing. Provide a general approach. iii. ( 5 points) Convert the dataset accordingly and fit a logistic regression model. Name it ‘model3’, and display its summary. Note: Use the same predictors as used for model2. b. (2 points) Use the Deviance residuals to form goodness-of-fit hypothesis tests on model3. What do you conclude from the result of the test? c. (3 points) Compare the summary of model2 and model3. What changes do you observe? Explain.