A certain substance, X, decomposes. 75 % of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is the following order: zeroth order, first order, second order
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1. A reaction was shown to follow second-order kinetics. How much time is required for [A] to change from 0.500 M to 0.160 M? (k = 0.456 M⁻¹ s⁻¹) 2. A substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 16.0% of the substance to decompose? 3. How long will it take for the concentration of A to decrease from 0.500 M to 0.100 M in the first-order reaction A → B?...
A certain substance, initially at 0.10 M in solution, decomposes by second-order kinetics. If the rate constant for this process is 0.40 L/mol • min, how much time is required for the concentration to reach 0.020 M?
A certain substance, initially present at 0.500 M, decomposes by second-order kinetics with a rate constant of 4.00 × 10-1 L/mol min. Calculate the time (in minutes) required for the system to reach a concentration of 0.116 M. ___ min?
The reaction, A → products, is known to be
zeroth order with respect to the concentration of A and zeroth
order overall. The rate constant for the reaction is 0.0750
M·hr-1 at a certain temperature.
If the initial concentration of A is 0.875 M. What will be the
concentration of A after 10.0 hr?
Answer M
How long would it take for 80.0% of the starting material (A) to
undergo reaction?
Answer hr
The reaction, A → products, is known...
please help with question 25 a and b. showing all work
25. a. (3pts) A radioactive sample of substance X has initial mass = 3.25mg. It decays by a first- order reaction. If its half-life = 5.6 days, calculate its mass after 11.2 days. Given k = 0.0490. k= b. (4pts) Compound Z decomposes by a second-order reaction. We are told the initial concentration is 0.660M. If the value of k = 7.12 x 10 sec"!, what will the concentration...
A certain reaction obeys second-order kinetics with respect to its only reactant (call it R) and has a rate constant of 0.0520 L mole-1 s-1. If the initial concentration of reactant R is 0.265 moles/liter, what is the concentration of R after 3.50 minutes? _______________
10 and 11
10. Nitrosyl chloride, NOCI, decomposes slowly to NO and Cl2, the reaction follows second order kinetics with a rate constant of 0.020 L mol-' s at a certain temperature. 2 NOCI (g) → 2 NO(g) + Cl2(g) If the initial concentration of NOCI in a closed reaction vessel is 0.050 M, what will be the concentration be after 30 minutes? 11. The reaction 2 NO2 (g) → 2 NO(g) + O2(g), is second order with respect to...
please help with question 25 a and b. showing all work
25. a. (3pts) A radioactive sample of substance X has initial mass 3.25mg. It decays by a first- order reaction. If its half-life = 5.6 days, calculate its mass after 11.2 days. Given k = 0.0490. On k= b. (4pts) Compound Z decomposes by a second-order reaction. We are told the initial concentration is 0.660M. If the value of k 7.12x 10sec, what will the concentration be after 2...
Question 22 2 pts The following reaction is first order in respect to CH3OH and first order in respect to HCI. With this in mind, what is the rate constant for the reaction? Be sure you choose the answer with the right units. CH2OH(aq) + HCl(aq) CH2Cl (aq) + HO (0) CH3OH HCI Initial Rate Reaction conc. conc. (M/s) 1 0.100 M 0.100 M 1.1 x 10-2 *conc = concentration 1.1 M-1 • 5:1 1.15-1 11 M-1.5-1 11 5-1 Question...
If 10.0 g of a substance A decomposes for 100 min, the mass of A remaining unreacted is found to be 1.25g. What is the half life of this reaction if it follows first order kinectics? The rate law for a reaction tha is first order in the disappearance of a single reaction, X. Intergrated form of first order rate law