Chemistry Chemistry Practice Problems Solutions Library

Average Rate of Reaction Solutions Library

Access 99 Average Rate of Reaction video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Average Rate of Reaction learn videos.

Browse Solutions

99 solutions

Average Rate of Reaction

Q. Determine the average rate of change of B from t=0 s to t=382 s.A → 2BTime (s)Concentration of A (M)00.691910.3953820.1

Solved • Apr 30, 2020

Average Rate of Reaction

Q. Given the following balanced chemical equation2Fe+3H2O → Fe2O3+3H2 How is the rate of appearance of H2 related to the rate of disappearance of Fe? 

Solved • Apr 29, 2020

Average Rate of Reaction

Q. Given the following balanced chemical equation 3 O2 + 2 CH3OH → 2 CO2 + 4 H2OHow is the rate of appearance of H2O related to the rate of disappeara...

Solved • Apr 27, 2020

Average Rate of Reaction

Q. What is the initial rate of the reaction (in mol•L-1•s-1)  depicted by this graph? 

Solved • Apr 13, 2020

Average Rate of Reaction

Q. What is the average rate of formation of I2? Express your answer to three decimal places and include the appropriate units.Now consider the followi...

Solved • Mar 17, 2020

Average Rate of Reaction

Q. Consider the reaction 5Br-(aq) + BrO3-(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(l) The average rate of consumption of BrO3- is 1.86x10-4 M/s over the first ...

Solved • Mar 13, 2020

Average Rate of Reaction

Q. For the reactionIO3–(aq) + 5I–(aq) + 6H+(aq) → 3I2(aq) + 3H2O(l)the rate of disappearance of I–(aq) at a particular time and concentration is 2.6 ×...

Solved • Feb 17, 2020

Average Rate of Reaction

Q. Given the reaction below2NO + 2H2 → N2 + 2H2Othe concentration is measured in moles per liter, what are the units for the rate of production of wat...

Solved • Feb 17, 2020

Average Rate of Reaction

Q. The rate of disappearance of HBr in the gas phase reaction2HBr (g) → H 2 (g) + Br2 (g) is 0.602 M s-1 at 150°C. The rate of appearance of Br2 is __...

Solved • Jan 20, 2020

Average Rate of Reaction

Q. Ammonia reacts with oxygen according to the equation: 4 NH3(g) + 5 O2(g) => 4 NO(g) + 6 H2O(l). In an experiment in which the rate of change of ...

Solved • Dec 20, 2019

Average Rate of Reaction

Q. A concentration-time study of the gas phase reaction 2 A3 → 3 A2 produced the data in the table below.What is the average rate of decomposition of ...

Solved • Nov 1, 2019

Average Rate of Reaction

Q. Suppose that for the reaction K + L → M, you monitor the production of M over time, and then plot the followinggraph from your data:Is the reaction...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. The rate of disappearance of HCl was measured for the following reaction:CH3OH(aq) + HCl(aq) CH3Cl(aq) + H2O(l)The following data were collected: T...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. If the experiment below is run for 60 s, 0.16 mol A remain. Which of the following statements is or are true?After 60 s there are 0.84 mol B in the...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Is the rate of disappearance of reactants always the same as the rate of appearance of products?

Solved • Dec 6, 2018

Average Rate of Reaction

Q. The isomerization of methyl isonitrile (CH3NC) to acetonitrile (CH3CN) was studied in the gas phase at 215 oC, and the following data were obtained...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. You 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 ...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the combustion of H2(g): 2 H2(g) + O2(g) → 2 H2O(g). If hydrogen is burning at the rate of 0.50 mol/s, what is the rate of consumption of ...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. The reaction 2 NO(g) + Cl2(g) → 2 NOCl(g) is carried out in a closed vessel. If the partial pressure of NO is decreasing at the rate of 56 torr/min...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the following hypothetical aqueous reaction:  A(aq) → B(aq). A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The fol...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. For 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...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. For 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...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. The reaction 2NO(g) + O2 (g) → 2NO2 (g) is second order in NO and first order in O2. When [NO]= 4.1×10−2 M and [O2]= 3.6×10−2 M , the observed rate...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the gas-phase reaction between nitric oxide and bromine at 273 oC2NO(g) + Br2(g)  →  2NOBr(g).The following data for the initial rate of a...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the following reaction: 2 N2O(g) → 2 N2(g) + O2(g). Express the rate of the reaction in terms of the change in concentration of each of th...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the following reaction: 2 N2O(g) → 2 N2(g) + O2(g). In the first 15.0 s of the reaction, 0.015 mol of O2 is produced in a reaction vessel ...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Dinitrogen monoxide decomposes into nitrogen and oxygen when heated. The initial rate of the reaction is 2.4 × 10−2 M/s. What is the initial rate o...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the following reaction: C4H8(g) → 2 C2H4(g). The following data were collected for the concentration of C4H8 as a function of time: Time (...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the following reaction: H2(g) + Br2(g) → 2HBr. The graph below shows the concentration of Br2 as a function of time.Make a rough sketch of...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the following reaction: 2 HBr(g) → H2(g) + Br2(g)Express the rate of the reaction in terms of the change in concentration of each of the r...

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the reaction: Cl2(g) + 3F2(g) → 2ClF3(g).Given that Δ[Cl2]/Δt = -0.054 M/s. Find Δ[F2]/Δt

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the reaction: Cl2(g) + 3F2(g) → 2ClF3(g).Given that Δ[Cl2]/t = -0.054 M/s. Find Δ[ClF3]/Δt

Solved • Dec 6, 2018

Average Rate of Reaction

Q. Consider the reaction: Cl2(g) + 3F2(g) → 2ClF3(g).Given that Δ[Cl2]/Δt = -0.054 M/s. Find the rate of the reaction.

Solved • Dec 6, 2018

Average Rate of Reaction

Q. For the reaction A + 2B → C under a given set of conditions, the initial rate is 0.100 M/s. What is Δ[B]/Δt under the same conditions?

Solved • Dec 6, 2018

Average Rate of Reaction

Q. The thiosulfate ion (S2O32-) is oxidized by iodine as follows:2S2O32- (aq) + I2 (aq) → S4O62- (aq) + 2I - (aq)In a certain experiment, 7.05 x 10-3 ...

Solved • Nov 6, 2018

Average Rate of Reaction

Q. The decomposition of NOBr is studied manometrically because the number of moles of gas changes; it cannot be studied colorimetrically because both ...

Solved • Nov 1, 2018

Average Rate of Reaction

Q. Express the rate of this reaction in terms of the change in concentration of each of the reactants and products:2D(g) + 3E(g) + F(g)  ⟶  2G(g) + H(...

Solved • Nov 1, 2018

Average Rate of Reaction

Q. Consider the following reaction in aqueous solution:5 Br−(aq) + BrO3 −(aq) + 6 H+(aq) ⟶ 3 Br2 (aq) + 3 H2O(l)If the rate of disappearance of Br– (a...

Solved • Oct 31, 2018

Average Rate of Reaction

Q. In the nuclear industry, chlorine trifluoride is used to prepare uranium hexafluoride, a volatile compound of uranium used in the separation of ura...

Solved • Oct 31, 2018

Average Rate of Reaction

Q. Ozone decomposes to oxygen according to the equation 2O3 (g) ⟶ 3 O2 (g). Write the equation that relates the rate expressions for this reaction in ...

Solved • Oct 31, 2018

Average Rate of Reaction

Q. Consider the general reaction aA + bB → cC and the following average rate data over some time period Δt:Determine a set of possible coefficients to...

Solved • Oct 29, 2018

Average Rate of Reaction

Q. At 40°C, H2O2(aq) will decompose according to the following reaction:2H2O2 (aq) → 2H2O (l) + O2 (g)The following data were collected for the concen...

Solved • Oct 29, 2018

Average Rate of Reaction

Q. In the Haber process for the production of ammonia,N2 (g) + 3H2 (g) + 2NH3 (g) what is the relationship between the rate of production of ammonia a...

Solved • Oct 29, 2018

Average Rate of Reaction

Q. Consider the reaction 4PH3 (g) → P4 (g) + 6H2 (g) If, in a certain experiment, over a specific time period, 0.0048 mole of PH  3 is consumed in a 2...

Solved • Oct 29, 2018

Average Rate of Reaction

Q. In a study of the decomposition of nitrosyl bromide at 10°C.NOBr → NO + 1/2 Br2 the following data were obtained: (1) The observed half life for th...

Solved • Sep 11, 2018

Average Rate of Reaction

Q. The gas NO reacts with H2, forming N2 and H2O: 2NO (g) + 2H2 (g) → 2H2O (g) + N2 (g) If Δ[NO]/Δt = -19.0 M/s under a given set of conditions, what ...

Solved • Aug 28, 2018

Average Rate of Reaction

Q. Consider the reaction, 2D(g) + 3 E(g) + F(g) → 2 G(g) + H(g) When H is increasing at 0.47 mol/Ls, how quickly is G increasing? Give your answer to ...

Solved • Aug 14, 2018

Average Rate of Reaction

Q. Consider the following reaction: 2HBr (g) → H2 (g) + Br2 (g) Part A In the first 23.0 s of this reaction the of HBr dropped from 0.550 M to 0.457 M...

Solved • Aug 7, 2018

Average Rate of Reaction

Q. Consider the reaction, 2NH3 (g) → N2 (g) + 3H2( g) If the rate of hydrogen production is 0.030 mol L-1 s-1, then the rate of nitrogen production is...

Solved • Aug 1, 2018

Average Rate of Reaction

Q. The following chemical reaction was performed and the concentration of CCl4 was measured over time. Cl2 (g) + CHCl3 (g) → HCl (g) + CCI (g) The [CC...

Solved • Jul 31, 2018

Average Rate of Reaction

Q. Consider the decomposition of dinitrogen pentoxide: 2 N2O5 (g) → 4 NO2 (g) + O2 (g) The following data were collected for the reaction at a given t...

Solved • Jun 25, 2018

Average Rate of Reaction

Q. Consider the reaction 8H2S(g) + 4O2 (g) → 8H2O(g) + S8 (g) Δ[H2S]/Δt = -0.031 M/s Part AFind Δ[O2]/Δt. Express your to two significant figure and i...

Solved • Jun 19, 2018

Average Rate of Reaction

Q. The following chemical reaction was performed and the concentration of HCl was measured over time. Cl2 (g) + CHCl3 (g) → HCl (g) + CCl4 (g) The [HC...

Solved • Jun 19, 2018

Average Rate of Reaction

Q. In the reaction 2N2O5 → 4NO2 + O2 given that the rate law is v = k[N 2O5] where v is the reaction rate or reaction velocity, calculate the rate of ...

Solved • Jun 19, 2018

Average Rate of Reaction

Q. For the gas phase decomposition of dimethyl ether at 500°C, the rate of the reaction is determined by measuring the appearance of CH4. CH3OCH3 → CH...

Solved • Jun 6, 2018

Average Rate of Reaction

Q. Suppose a small lake is contaminated with an insecticide that decomposes with time. An analysis done in June shows the decomposition product concen...

Solved • Jun 6, 2018

Average Rate of Reaction

Q. A reaction generates chlorine gas (Cl 2) as a product. The reactants are mixed and sealed in a 500.-mL container. After 30.0 minutes, 2.05 x 10-3 m...

Solved • Jun 6, 2018

Average Rate of Reaction

Q. At a given temperature, the elementary reaction A ⇌ B in the forward direction is first order in A with a rate constant of 4.30 x 102 s-1. The reve...

Solved • May 31, 2018

Average Rate of Reaction

Q. The decomposition of dinitrogen pentoxide is described by the chemical equation 2N2O5(g) → 4NO2(g) + O2(g) If the rate of appearance of NO 2 is equ...

Solved • May 30, 2018

Average Rate of Reaction

Q. a. If Δ[NO3] / Δt is -21.51 x 104 mM/min in the following reaction, what is the rate of appearance of NO2? NO3(g) + NO(g) → 2NO(g) b. What is the r...

Solved • May 29, 2018

Average Rate of Reaction

Q. The rate of the following reaction is 0.720 M/s. What is the relative rate of each species in the reaction?

Solved • May 27, 2018

Average Rate of Reaction

Q. The decomposition of N2O5 can be described by the equation2N2O5 (soln) → 4NO2 (soln) + O2 (g)Given these data for the reaction at 45° C in carbon t...

Solved • May 21, 2018

Average Rate of Reaction

Q. Consider the reaction: 8H2S(g) + 4O2(g) → 8H2O(g) + S8(g)            Δ[H 2S]/Δt = -0.031 M/s a. Find Δ[O2]/Δt.b. Find Δ[H2O]/Δt.c. Find Δ[S8]/Δt.d....

Solved • Apr 2, 2018

Average Rate of Reaction

Q. Consider the reaction: 8H2S(g) + 4O2(g) → 8H2O(g) + S8(g)        Δ[H2S]/Δt = -0.071 M/s a. Find Δ[O2]/Δt. Express your answer to two significant fi...

Solved • Mar 28, 2018

Average Rate of Reaction

Q. Consider the following reaction and data:H2 + 2ICl → 2HCl + I 2Time (s)                I  2 concentration (M)    5                              1.1...

Solved • Mar 27, 2018

Average Rate of Reaction

Q. Consider the reaction:8H2S(g) + 4O2 → 8H2O(g) + S8(g)Δ[H2S]/Δt= - 0.019 M/sa. Find Δ[O2]/Δtb. Find Δ[H2O]/Δtc. Find Δ[S8]/Δtd. Find the rate of the...

Solved • Mar 23, 2018

Average Rate of Reaction

Q. Consider the following reaction: NO2(g) → NO(g) + 1/2 O2(g). The following data were collected for the concentration of NO2 as a function of time. ...

Solved • Mar 22, 2018

Average Rate of Reaction

Q. The aqueous reaction of KOH with HBr is:KOH(aq) + HBr(aq) → KBr(aq) + H2O(l)At the start of such a reaction, the concentration of KOH(aq) is 0.275M...

Solved • Mar 21, 2018

Average Rate of Reaction

Q. An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the course of the react...

Solved • Mar 8, 2018

Average Rate of Reaction

Q. Consider the reaction5Br−(aq) + BrO3−(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(l)The average rate of consumption of Br− is 2.06 × 10−4 M/s over the first tw...

Solved • Feb 21, 2018

Average Rate of Reaction

Q. Consider the reaction:2H3PO4 → P2O5 + 3H2OUsing the information in the following table, Time (s)                          P  2O5 (M)0              ...

Solved • Feb 20, 2018

Average Rate of Reaction

Q. Complete the expressions for the rate of appearance of products and the rate of disappearance of reactants in each of the following reactions. NOTE...

Solved • Feb 15, 2018

Average Rate of Reaction

Q. The decomposition of N2O5 can be described by the equation: 2N2O5 (soln) →  4NO2 (soln) + O 2 (g)   Given this data for the reaction at 45 degre...

Solved • Jan 4, 2018

Average Rate of Reaction

Q. The decomposition of N2O5 can be described by the equation2N2O5 → 4NO2 + O2Given these data for the reaction at 45 °C in carbon tetrachloride solut...

Solved • Sep 26, 2017

Average Rate of Reaction

Q. The decomposition of N2O5 can be described by the equation.2N2O5 (soln) →  4NO2 (soln) + O2 (g)Given this data for the reaction at 45°C in carbon t...

Solved • Sep 23, 2017

Average Rate of Reaction

Q. The balanced equation for the reaction of bromate ion with bromide in acidic solution is given by: At a particular instant in time, the value of −...

Solved • Jul 25, 2017

Average Rate of Reaction

Q. Consider the following hypothetical reaction 4A (g) + 2B (g) → 3C (g) + D (g) Which of the following statement(s) is/are correct? i. The rate B ...

Solved • Apr 28, 2017

Average Rate of Reaction

Q. Consider the reaction N2(g) + 3H2(g) → 2NH3(g) Suppose at a particular moment during the reaction molecular hydrogen is reacting at a rate of 0.08...

Solved • Apr 12, 2017

Average Rate of Reaction

Q. What is the rate for the formation of Cu(s) in the reaction Cu2+(aq) + H2(g) ⇌ Cu(s) + 2 H+(aq) if Δ[H+] / Δt = 1.2 x 10 -3 ?1. 6 x 10-42. 2.4 x 10...

Solved • Apr 7, 2017

Average Rate of Reaction

Q. Consider the reaction: 2 NO(g) + O2(g) →2 NO2(g) If the instantaneous rate of reaction of nitric oxide (NO) is ‐ 0.016 M/s, at what rate is molecul...

Solved • Nov 15, 2016

Average Rate of Reaction

Q. For the reaction given, the FeCl3 changes from 1.000 M to 0.444 M in the first 10 seconds.Calculate the average rate in the first 10 seconds. 2 FeC...

Solved • Sep 23, 2016

Average Rate of Reaction

Q. Consider the following chemical equation 12 HCIO4 (aq) + P4O10 (g) --> 4 H3PO4 (aq) + 6 Cl2O7 (g) If the rate of the appearance with respect t...

Solved • Aug 25, 2016

Average Rate of Reaction

Q. For the reaction A + 2B → C, which expression is correct?A) Δ[C]/ Δt = Δ [A]/ ΔtB) Δ[C]/ Δt = 2Δ [B]/ ΔtC) Δ[C]/ Δt = -2Δ [B]/ ΔtD) Δ[C]/ Δt = -(1/...

Solved • Aug 25, 2016

Average Rate of Reaction

Q. For the reactionBrO3- + 5Br - + 6H+ → 3Br2 + 3H2Oat particular time, -Δ[BrO3-]/ Δt = 1.5 x 10 -2 M/s.What is -Δ [Br-]/ Δt at the same instant?A) 13...

Solved • Aug 25, 2016

Average Rate of Reaction

Q. Given the following balanced equation, determine the rate of reaction with respect to [SO2]. 2 SO2 (g) + O2 (g) → 2 SO3 (g) A. Rate = -1/2 Δ[SO2]...

Solved • Aug 24, 2016

Average Rate of Reaction

Q. Given the following balanced equation, determine the rate of reaction with respect to [NOCl]. If the rate of Cl2 loss is 4.84 x 10-2 M/s, what is t...

Solved • Aug 24, 2016

Average Rate of Reaction

Q. The combustion of propanol, C3H7OH (l), to produce carbon dioxide and water vapor is a highly exothermic process2 C3H7OH (l) + 9 O2 (g) → 6 CO2 (g)...

Solved • Aug 24, 2016

Average Rate of Reaction

Q. Consider the following reaction:6NaOH + Al2O3 + 12HF → 2Na3AlF6 + 9H2OAt a given time, water is being produced at a rate of 0.54 M/min for this rea...

Solved • Aug 15, 2016

Average Rate of Reaction

Q. Which statement is true of the reaction below?  2 A (g) + B (g) → C (g) + 2 D (g) a) B is lost at twice the rate that A is lost b) D is gained a...

Solved • May 12, 2016

Average Rate of Reaction

Q. Consider this reaction. 4 NH3 (g) + 3 O2 (g) ⇌ 2 N2 (g) + 6 H2O (l) If the rate formation of N2 is 0.10 M•s-1, what is the corresponding rate of ...

Solved • May 9, 2016

Average Rate of Reaction

Q. Under certain conditions, the average rate of appearance of oxygen gas in the reaction 2O3(g) → 3O2(g) is 1.2 x 10–3 atm•s–1. What is the average...

Solved • Apr 26, 2016

Average Rate of Reaction

Q. For reaction 5 O2 (g) + 4 NH3 (g) → 4 NO (g) + 6 H2O (g) if NH3 is being consumed at a rate of 0.50 M • s –1, at what rate is H2O being formed? ...

Solved • Apr 22, 2016

Average Rate of Reaction

Q. Using the format given in your text, which of the following rate equalities is correct for the following reaction? 4 NH3(g) + 7 O2 (g) → 4 NO2(g) ...

Solved • Apr 15, 2016

Average Rate of Reaction

Q. For the reaction, 4PH3(g) → P4(g) + 6H2(g) the rate of reaction is 0.018 moles L−1s−1, what is the rate of formation of H 2? a) 0.018 moles L−1s...

Solved • Mar 28, 2016

Average Rate of Reaction

Q. For the reaction,2NO(g) + 2H2(g) → N2(g) + 2H2O(g)at a particular time the concentration of NO was decreasing at an instantaneous rate of 0.54 mole...

Solved • Mar 28, 2016

Average Rate of Reaction

Q. Based on your knowledge of general rates answer the following question. 

Solved • Mar 28, 2016

Average Rate of Reaction

Q. The rate of decrease in N2H4 partial pressure in a closed reaction vessel is 75 torr/h. What is the rate of change of ammonia partial pressures and...

Solved • Feb 10, 2016

Average Rate of Reaction

Q. Given the following balanced equation, if the rate of Cl2 loss is 4.24 × 10-2 M/s, what is the rate of formation of NOCl?  

Solved • Feb 2, 2016

Average Rate of Reaction

Q. What is the balanced reaction for the following rate relationships?    

Solved • Feb 2, 2016