i need the same thing done here does questions 19-22 show work

19. The hydronium ion concentration of a dilute solution of vinegar is 1.45 x 10-M. What is the pH of this solution? A ) 5.71 8 7 B ) - 4.8 C ) 4.8 7 D ) - 5.7 2" , E ) 7.0 20. The pH of a popular soft drink is 3.4; what is its hydronium ion concentration? A) 5.0 x 10 4 M B) 4.0 x 104M C). 2,5 x 105 M D) 1,0 x 10-7 M E) 5.0 x 10-5M PART II PROBLEMS: PLEASE SHOW ALL YOUR WORK TO RECEIVE FULL CREDIT. ANSWERS MUST BE SHOWN WITH THE RIGHT NUMBER OF SIGNIFICANT FIGURES. ON NUMERICAL PROBLEMS, YOU MUST SHOW YOUR WORK AND INCLUDE UNITS TO RECEIVE FULL CREDIT. 21. At 2000 C the equilibrium constant for the reaction 2NO(8) =N2(8) + 02(8) is Kc = 2400. If the initial concentration of NO is 0.175 M, what are the equilibrium concentrations of N2, O2 and NO? (Show all your work including ICE table) 22. 4.00 mol NO2 was initially placed in a 80.0 L flask and allowed to equilibrate at 200 C. At equilibrium, 3.76 mole of NO2 remained. Fill in the following ICE table and determine the value of Kc at 200 C. 2NO2 (8) 2 NO (g) O2 (g ) 0.00 0.00 M Initial M Change M Equilibrium Kc = W