basi Hint: You will need a table of Ka values to answer these questions. QUESTION 10...
Need help really bad QUESTION 7 Use the following table to answer the questions below. Important: Round off all of your answers to one decimal point Labor force Unemployed (thousands) (thousands) Regies May 2010 May 2011 May 2010 May 2011 Northeast 2 017 28.2019 482.7 2.254.1 South 5. 5 5.44.1 21 1263 126.3 4.896.6 34.530.2 34.410.0 105.7 2.83.7 15.12 35.6180 3,054.0 Midwest South %, Midwest South A. In May 2010, the number in thousands) of workers employed was in the...
Click Submit to complete this assessment Question 5 of 5 Save Question 5 10 points A solution of a weak acid, HA was created by dissolving 3.12 g inte enough water to make 2500 mL of solution. The resulting pH was 4.24. What is the Ka of this acid? The molar mass of this acid is 174.1 g/mol Type you answer below to two significant figures. In the work to be submitted after the exam is done, include a balanced...
Using tabulated Ka and Kb values, calculate the pH of the following solutions. Answer to 2 decimal places. A solution containing 3.1x101 M HF and 4.6x101 M NaF. For HF, Ka 7.2x10-4 Submit Answer Tries o/s 1000.0 mL of solution containing 23.0 g of HOCI and 45.0 g of NaoCI For Hoci, Ka-3.5x10-8 Submit Answer Tries o/s A solution made by mixing 135.00 mL of 1.100 M HOBr with 50.00 mL of 1.000 M NaOH. For HOBr, Ka-2.0×10-9. Submit Answer...
B, C, and D are wrong. Please show all work. Thank you! Ka was not provided in the info. <Assignment 13 (Chapter 16) Problem 16.88 ③ 5 of7 Review Constants 1 Periodic Table Consider the titration of 44.0 mL of 0.270 M HF with 0.190 M NaOH. Calculate the pH at each of the following points. Part A How many milliliters of base are required to reach the equivalence point? Express your answer using three significant figures. VNaOH = 62.5...
Can you please try to answer these four questions for me? 3 pts Question 22 20.0mL of a 0.100 M solution of HA is mixed with 10.0mL of water. The pH of the solution is 1.25. What is the Ka of the acid? Report your answer to 3 decimal points. 3 p Question 27 Determine the molar solubility of an ionic compound with the general formula X,Y, where X is the cation and Y is the anion, given a Ksp...
Given that at 25.0 ∘C Ka for HCN is 4.9×10^-10 Kb for NH3 is 1.8×10^−5 - Part C Calculate the pH of a 0.20 M solution of KCN at 25.0 °C. Express the pH numerically using two decimal places. View Available Hint(s) Templates Symbols uido redo reset keyboard shortcuts help pH = Submit Request Answer - Part D Calculate the pH of a 0.20 M solution of NH Brat 25.0°C. Express the pH numerically using two decimal places. View Available...
please help Question Completion Status: QUESTION 11 Which one is correct answer for Kb? CN (aq) + H20 (1) + HCN (aq) + OH- (aq) ОА OB.F (aq) + H20 (1) + HF(aq) + OH-(aq) OC Zn(OH)6 (aq) + H2O(l) — [Zn(OH)5(OH2)]+ e- 2+ HCN(aq) + F(aq) + CN (aq) + HF(aq) E. Both A and B is for Kb Click Save and Submit to save and submit. Click Save All Answers to save all answers. QUESTION 12 of the...
i need help on both LUIUS. Question Completion Status: QUESTION 21 A 35.0 mL sample of 0.180 M benzoic acid is titrated with a 0.180 M NaOH solution. What is the pH at the equivalence point? The Ka of benzoic acid is 6.3 10-5 11.20 9.80 4.20 08.58 7.00 QUESTION 22 A 25.0-ml sample of 0.150 M hydrocyanic acid (HCN) is titrated with a 0.150 M NaOH solution. What is the pH after 13 ml NaOH has been added? The...
QUESTIONS Calculate the pH of a solution that has a[OH) = 4.20 x 10-SM (significant figures) Click Save and Submit to save and submit. Click Save All Answers to save all answers. IF Type here to search o Re * $
Using the appropriate interest table, answer each of the following questions. (Each case is independent of the others.) Click here to view factor tables What is the future value of $7,890 at the end of 5 periods at 8% compounded interest? (Round factor values to 5 decimal places, e.g. 1.25124 and final answer to 0 decimal places, e.g. 458,581.) The future value $enter the future value in dollars rounded to 0 decimal places eTextbook and Media Click here...