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Rate Law

Q. Analyzing a new reaction Consider the following elementary steps that make up the mechanism of a certain reaction: 1. 3A → B + C 2. B + 2D → C + F What is the rate law or step 1 of this reaction? Express your answer in standard MasteringChemistry notation. For example, if the rate law is k[A][C]^3 type k*[A]*[C] ^3.

Solved • Feb 6, 2020

Reaction Mechanism

Q. Analyzing a new reaction Consider the following elementary steps that make up the mechanism of a certain reaction: 1. 3A → B + C 2. B + 2D → C + F Which species is a reaction intermediate? a) A b) B c) C d) D e) F

Solved • Feb 6, 2020

Reaction Mechanism

Q. Analyzing a new reaction Consider the following elementary steps that make up the mechanism of a certain reaction: 1. 3A → B + C 2. B + 2D → C + F What is the overall reaction? Express your answer as a chemical equation.

Solved • Feb 6, 2020

Arrhenius Equation

Q. A certain reaction with an activation energy of 195 kJ/mol was run at 555 K and again at 575 K. What is the ratio of f at the higher temperature to f at the lower temperature? Express your answer numerically using one significant figure.

Solved • Feb 6, 2020

Arrhenius Equation

Q. The rate constant of a chemical reaction increased from 0.100 s^-1 to 2.70 s^-1 upon raising the temperature from 25.0 °C to 35..0 °C. Part A Calculate the value of ( 1/T2 - 1/T1) where T1 is the initial temperature and T2 is the final temperature. Express your answer numerically. Part B Calculate the value of ln (k1/k2) where k1 and k2 correspond to the rate constants at the initial and the final temperature as defined in Part A. Express your answer numerically. Part C What is the activation energy of the reaction? Express your answer numerically in kilojoules per mole.

Solved • Feb 6, 2020

Rate Law

Q. Consider the reaction A + 2B ⇌ C whose rate at 25 °C was measured using three different sets of initial concentrations as listed in the following table: Calculate the initial rate for the formation of C at 25 °C, if [A] = 0.50 M and [B] = 0.075 M. Express your answer to two significant figures and include the appropriate units.

Solved • Feb 13, 2020

Integrated Rate Law

Q. A certain second-order reaction (B→products) has a rate constant 1.70x10^-3 M^-1 • s^-1 at 27 °C and an initial half-life of 258 s. What is the concentration of the reactant B after one half-life? Express your answer with the appropriate units.

Solved • Feb 13, 2020