Assume that the reaction represented by the equation
A → products
is first order in A, with a rate constant of k = 1.246×10-3 s-1. If the initial concentration of A is {y} M, how much time does it take for the concentration to drop to 30% of the initial value?
Enter your result in seconds, without the unit, to a precision of 0.1 seconds.
Assume that the reaction represented by the equation A → products is first order in A,...
Assume that the reaction represented by the equation A → products is second order in A with a rate constant of 8.5×10-2 M-1·s-1. What is the concentration of A after a reaction time of 5s if the initial concentration of A was 7.0 M? Enter your result in M, without the unit, to a precision of 0.1M.
Half-life equation for first-order reactions: t1/2=0.693k where t1/2 is the half-life in seconds (s), and k is the rate constant in inverse seconds (s−1). a) What is the half-life of a first-order reaction with a rate constant of 4.80×10−4 s−1? b) What is the rate constant of a first-order reaction that takes 188 seconds for the reactant concentration to drop to half of its initial value? Express your answer with the appropriate units. c)A certain first-order reaction has a rate constant...
The reaction, aA products, is a first order reaction with a rate constant of 1.248 x 10-4 s-1 . a. How long (in seconds) does it take for the initial amount of A to decrease by 30%? b. What fraction of reactant remains after 30 minutes? c. What is the half-life for the reaction? d. How long does it take for the initial amount of reactant to decrease by 87.5%?
A certain first-order reaction (A products) has a rate constant of 5.40 10-3 s I at 45 °C How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration? at 27 °C A certain second-order reaction (B-products) has a rate constant of 1.05x10-3 M 1.s and an initial half-life of 266 s What is the concentration of the reactant B after one half-life?
1. The following chemical reaction: A → products shows first order kinetics with respect to A; rate = k[A]. Assume k = 10.09 x 10-4 s-1 . If the initial concentration of A was 0.82 mol L-1 and then decreased to 0.11 mol L-1 , how much time elapsed in minutes? 2. Consider the following balanced chemical equation: H2O2 (aq) + 3 I-(aq) + 2 H+(aq) → I3- (aq) + 2 H2O (l) In the first 62.9 seconds of the...
A
certain reactant disappears by a first order reaction that has a
rate constant K= 3.5x10^-3 s-1. If the initial concentration of the
reactant is 0.500 M , how long will it take for the concentration
to drop to
0.200 M ?
4. A certain reactant disappears by a first-order reaction that has a rate constant k=3.5 x 10 s. If the initial concentration of the reactant is 0.500 M, how long will it take for the concentration to drop...
The first order reaction, SO2Cl2 -> SO2 + Cl2, has a rate constant of 0.17 h^-1. If the initial concentration of SO2Cl2 is 1.25 x 10^-3 M, how many seconds does it take for the concentration to drop to 0.31 x 10^-3 M?
Part A. A certain first-order reaction (A→products) has a rate constant of 3.90×10−3 s−1 at 45 ∘C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration? Part B. A certain second-order reaction (B→products) has a rate constant of 1.90×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 298 s . What is the concentration of the reactant B after one half-life?
Part A: A certain first-order reaction (A→products) has a rate constant of 6.30×10−3 s−1 at 45 ∘C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration? Part B: A certain second-order reaction (B→products) has a rate constant of 1.30×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 264 s . What is the concentration of the reactant B after one half-life?
1. A certain first order reaction has a rate constant of 0.036 min-1. How much of the reactant will remain if the reaction is run for 2.5 hours and the initial concentration of the reactant is 0.31 M? 2. A certain first order reaction has a rate constant of 0.036 min-1. How much of the reactant will remain if the reaction is run for 2.5 hours and the initial concentration of the reactant is 0.31 M? 3. The rate constant...