Question 18 2 pts Consider the following hypothetical reaction: A (aq) B (aq) At the beginning of the reaction, 0.850 mol of A are added to the reaction flask containing 1.0 L of solution. The reaction is then monitored and the following data is collected: Time (minutes) 0 10 20 Moles of A 0.850 mol 0.550 mol 0.420 Calculate the average rate of disappearance of A between t = 0 minutes and t = 20 minutes. 0.0215 mol/min -0.0215 mol/min...
the following first order reaction has a half life of 22.5 minutes. 2H2O2(aq) 2H2O(l) + O2(g) a. calculate the rate constant for this reaction. b. if the initial concentraition of H2O2 is 0.30M, calculate the amout of H2O2 that reamains after 45 min.
Consider the reaction: 2 NO(g) + O2 (g)--> 2 NO2 (g) The following data were obtained from three experiments using the method of initial rates: 3. Consider the reaction: 2 NO(g) + O2(g) → 2 NO2(g) The following data were obtained from three experiments using the method of initial rates: Initial [NO] Initial rate NO Initial [02] mol mol L-1 mol L-1 L-15-1 0.010 0.010 Experiment 1 Experiment 2 Experiment 3 0.020 0.010 2.5 x 10-5 1.0 x 10-4 5.0...
For the reaction 2N,05(e) → 4NO2(g) + O2(g), the following data were collected: t(minutes) [N205] (mol/L) 0 1.24 x 10-2 10. 0.92 x ex 102 20. 0.68 10-2 30. 0.50 x 10-2 0.37 * 10-2 * 10-2 70. 0.15 x 10-2 40. 50 0.28 x A graph of In[N 20 s) vs time produced a straight line. Calculate the value of k and include units.
2 pts Question 14 Consider the reaction 2H2(g) + O2(g) → 2H2O(l) AH = -286 kJ Which of the following is true? The reaction is exothermic The reaction is endothermic The reaction is neutral with respect to energy change Heat is absorbed by the system Information is not enough to tell about the energy change
Uranyl nitrate decomposes according to UO2(NO3)2(aq) -> UO3(s) +2 NO 2 (g)+ 1/2 O2(g) The following data were recorded for the reaction at 25 °C t/min 20.0 60.0 180.0 360.0 [UO2(NOs)2]M 0.01413 0.01096 0.00758 0.00302 0.00055 Determine the order of reaction and rate constant for the reaction
27) (14 pts) Two reactions #1 and #2 that can be represented as A 2B were followed as shown in the table below. Time, min 20 80 100 C 10 30 40 50 60 Reaction #1 [A], M 1.6001290 1081 0.930 0.816 0.727 0,656 0.548 0.471 [A], M 1.600 1.345 1131 0951 0.800 0.673 0566 0.400 0283 Reaction #2 A) (4 pts) Determine the reaction order for each reaction. B) (4 pts) Determine the value and units for the rate...
Question 4 1 pts Which of the following mole ratios CANNOT be derived from the reaction 2 502 (g) + O2 (g) + 2 H20 (1) --> 2 H2SO4 (aq) ? 02 mol SO2 2 mol H2SO4 2 mol H2SO4 2 mol O2 0 1 mol O2 2 mol H20 O 2 mol O2 1 mol O2 2 mol H20 2 mol SO2 Question 1 1 pts What do the coefficients in a balanced equation tell us? Mark ALL that...
a. in the reaction: 2 C2H6 (g) + 7 O2 (g) -----> 4 CO2 (g) + 6 H2O (g), increasing the concentration of C2H6 (g) will: increase the acivation energy, decrease the activation energy, increase reaction rate OR decrease the reaction rate? b. An equilibrium constant with a value of 5.7 X 10-8 indicates that at equilibrium: the reactants are favored, the products are favored, OR approximately equal concentrations of reactions and products are present. c. A balloon that contains...
9,10,11 9. Consider the decomposition reaction of N2Os. 2 N203(g) → 4NO2(g) + O2(g) follows the first order kinetics with rate constant of 4.8 x 10's. (a) if the initial 165 x 10-2M what is the concentration at 825 s? (b) How long it will take for concentration is 1.65 x 10-2M what is the concentrat the concentration of N2Os to decrease to 1.00 x 10-2M? t 10. Nitrosyl chloride, NOCI, decomposes slowly to NO and Cl2, the reaction follows...