09:14Introduction to reaction rates | Kinetics | AP Chemistry | Khan AcademyKhan Academy Organic Chemistry658views
Multiple ChoiceConsider the following reaction:2 H2O2 (aq) → 2 H2O (l) + O2 (g)Calculate the rate of the reaction between 25 sec and 65 sec.1660views17rank3comments
Multiple ChoiceThe rate of consumption of C3H6 in the following reaction is 0.45 M/s. Calculate the rate of production of H2O. 2 C3H6 + 2 NH3 + 3 O2 → 2 CH2CHCN + 6 H2O258views
Textbook QuestionUse the following equation and graph to answer questions 1 and 2. Hydrogen iodide decomposes at 410 °C, according the reaction: 2 HI1g2¡H21g2 + I21g2 The graph shows how the concentration of HI changes over time. What is the average rate of loss of HI over the time period 0–40 s (LO 14.1) (a) 7.5 * 10-3 M>s (b) 4.8 * 10-3 M>s (c) 3.0 * 10-2 M>s (d) 3.5 * 10-3 M>s670views
Textbook QuestionYou study the rate of a reaction, measuring both the concentration of the reactant and the concentration of the product as a function of time, and obtain the following results: Which chemical equation is consistent with these data: (i) A → B, (ii) B → A, (iii) A → 2 B, (iv) B → 2 A?710views
Textbook Question(a) What are the units usually used to express the rates of reactions occurring in solution?1025views
Textbook QuestionConsider the following hypothetical aqueous reaction: A1aq2S B1aq2. A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The following data are collected: Time (min) 0 10 20 30 40 Moles of A 0.065 0.051 0.042 0.036 0.031 (a) Calculate the number of moles of B at each time in the table, assuming that there are no molecules of B at time zero and that A cleanly converts to B with no intermediates.899views
Textbook QuestionConsider the following hypothetical aqueous reaction: A1aq2S B1aq2. A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The following data are collected: Time (min) 0 10 20 30 40 Moles of A 0.065 0.051 0.042 0.036 0.031 (b) Calculate the average rate of disappearance of A for each 10-min interval in units of M>s.1552views1rank
Textbook QuestionA flask is charged with 0.100 mol of A and allowed to react to form B according to the hypothetical gas-phase reaction A1g2¡B1g2. The following data are collected: Time (s) 0 40 80 120 160 Moles of A 0.100 0.067 0.045 0.030 0.020 (c) Which of the following would be needed to calculate the rate in units of concentration per time: (i) the pressure of the gas at each time, (ii) the volume of the reaction flask, (iii) the temperature, or (iv) the molecular weight of A?1057views
Textbook QuestionThe isomerization of methyl isonitrile 1CH3NC2 to acetonitrile 1CH3CN2 was studied in the gas phase at 215 C, and the following data were obtained: Time (s) 3CH3nC4 1M2 0 0.0165 2000 0.0110 5000 0.00591 8000 0.00314 12,000 0.00137 15,000 0.00074 (b) Calculate the average rate of reaction over the entire time of the data from t = 0 to t = 15,000 s.559views
Textbook QuestionThe rate of disappearance of HCl was measured for the following reaction: CH3OH1aq2 + HCl1aq2¡CH3Cl1aq2 + H2O1l2 The following data were collected: Time (min) 3HCl 4 1M2 0.0 1.85 54.0 1.58 107.0 1.36 215.0 1.02 430.0 0.580 (b) Calculate the average rate of reaction for the entire time for the data from t = 0.0 min to t = 430.0 min.786views
Textbook QuestionThe rate of disappearance of HCl was measured for the following reaction: CH3OH1aq2 + HCl1aq2¡CH3Cl1aq2 + H2O1l2 The following data were collected: Time (min) 3HCl 4 1M2 0.0 1.85 54.0 1.58 107.0 1.36 215.0 1.02 430.0 0.580 (a) Calculate the average rate of reaction, in M>s, for the time interval between each measurement.553views
Textbook QuestionThe rate of disappearance of HCl was measured for the following reaction: CH3OH1aq2 + HCl1aq2¡CH3Cl1aq2 + H2O1l2 The following data were collected: Time (min) 3HCl 4 1M2 0.0 1.85 54.0 1.58 107.0 1.36 215.0 1.02 430.0 0.580 (c) Which is greater, the average rate between t = 54.0 and t = 215.0 min, or between t = 107.0 and t = 430.0 min?357views
Textbook QuestionFor each of the following gas-phase reactions, indicate how the rate of disappearance of each reactant is related to the rate of appearance of each product: (c) N21g2 + 3 H21g2¡2 NH31g22053views
Textbook Question(b) The reaction 2 NO1g2 + Cl21g2¡2 NOCl1g2 is carried out in a closed vessel. If the partial pressure of NO is decreasing at the rate of 56 torr/min, what is the rate of change of the total pressure of the vessel?1366views
Textbook QuestionConsider the reaction: 2 HBr( g) ¡ H2( g) + Br2( g) a. Express the rate of the reaction in terms of the change in concentration of each of the reactants and products.1714views1rank
Textbook QuestionConsider the reaction:2 HBr (g) → H2 (g) + Br2 (g)c. If the volume of the reaction vessel in part b was 1.50 L, what amount of Br2 (in moles) was formed during the first 15.0 s of the reaction?2584views1comments
Textbook QuestionConsider the reaction: 2 HBr( g) ¡ H2( g) + Br2( g) b. In the first 25.0 s of this reaction, the concentration of HBr dropped from 0.600 M to 0.512 M. Calculate the average rate of the reaction during this time interval.2801views
Textbook QuestionConsider the reaction: 2 N2O( g) ¡ 2 N2( g) + O2( g) a. Express the rate of the reaction in terms of the change in concentration of each of the reactants and products.3061views
Textbook QuestionFor the reaction 2 A( g) + B( g) ¡ 3 C( g), b. when A is decreasing at a rate of 0.100 M>s, how fast is B decreasing? How fast is C increasing?1703views1rank
Textbook QuestionFor the reaction 2 A( g) + B( g) ¡ 3 C( g), a. determine the expression for the rate of the reaction in terms of the change in concentration of each of the reactants and products.2260views3rank
Textbook QuestionConsider the reaction: 8 H2S( g) + 4 O2( g) ¡ 8 H2O( g) + S8( g) Complete the table.1251views
Textbook QuestionConsider the reaction: C4H8( g) ¡ 2 C2H4( g) The tabulated data were collected for the concentration of C4H8 as a function of time: a. What is the average rate of the reaction between 0 and 10 s? Between 40 and 50 s?977views
Textbook QuestionConsider the reaction: NO2( g) ¡ NO( g) + 1 2 O2( g) The tabulated data were collected for the concentration of NO2 as a function of time: a. What is the average rate of the reaction between 10 and 20 s? Between 50 and 60 s?886views
Textbook QuestionConsider the reaction: NO2( g) ¡ NO( g) + 1 2 O2( g) The tabulated data were collected for the concentration of NO2 as a function of time: b. What is the rate of formation of O2 between 50 and 60 s?723views
Textbook QuestionConsider the reaction: H2( g) + Br2( g) ¡ 2 HBr( g) The graph shows the concentration of Br2 as a function of time. a. Use the graph to calculate each quantity: (i) the average rate of the reaction between 0 and 25 s1364views
Textbook QuestionConsider the reaction: 2 H2O2(aq) ¡ 2 H2O(l ) + O2( g) The graph shows the concentration of H2O2 as a function of time. Use the graph to calculate each quantity: d. If the initial volume of the H2O2 is 1.5 L, what total amount of O2 (in moles) is formed in the first 50 s of reaction?1315views
Textbook QuestionA 1.50 L sample of gaseous HI having a density of 0.0101 g>cm3 is heated at 410 °C. As time passes, the HI decomposes to gaseous H2 and I2. The rate law is -Δ3HI4>Δt = k3HI42, where k = 0.031>1M ~ min2 at 410 °C. (b) What is the partial pressure of H2 after a reaction time of 8.00 h?402views
Open QuestionWhich species has the greatest rate of appearance in the reaction below? 2 H2S + O2 → 2 S + 2 H2O144views
Open QuestionWhich species has the greatest rate of disappearance in the reaction below? CH4 + 2 O2 → CO2 + 2 H2O151views
Open QuestionWhich species has the greatest rate of disappearance in the reaction below? CH4 + 2 O2 → CO2 + 2 H2O140views