the half life of protactinium-217 is 4.90x 10^-3 sec. a)what is the order of the reaction?...

the half life of protactinium-217 is 4.90x 10^-3 sec. a)what is the order of the reaction? How do you know? b) What is the rate constant for the decay?

Expert Solution

Given half life of protactinium-217 is , t_1/2 = 4.90x 10^-3 sec

(a) Protactinium-217 is a radioactive nuclei.We know that all radio active nuclear reactions are of first order reaction.

So the order of the reaction is one (1)

(b) For a first order reactions, rate constant , K = 0.693 / t_1/2

= 0.693 / (4.90x10^-3 s)

= 141.4 s^-1

queen_honey_blossom answered 5 days ago

Part A What is the half-life of a first-order reaction with a rate constant of 1.80×10−4 s−1?...

Part A What is the half-life of a first-order reaction with a rate constant of 1.80×10−4 s−1? Express your answer with the appropriate units. Part B What is the rate constant of a first-order reaction that takes 163 seconds for the reactant concentration to drop to half of its initial value? Express your answer with the appropriate units. Part C A certain first-order reaction has a rate constant of 3.10×10−3 s−1. How long will it take for the reactant concentration to...

A first-order reaction has a half-life of 17.3 minutes. What is the time required for the...

A first-order reaction has a half-life of 17.3 minutes. What is the time required for the reactant concentration to decrease to 2.0% of it's origional value? Thank you!

The reaction A(aq) ---> B(aq) + C(aq) is a first order reaction. The half-life of A(aq)...

The reaction A(aq) ---> B(aq) + C(aq) is a first order reaction. The half-life of A(aq) is 86.6 s at 25.0oC and its half-life is 66.2 s at 45.0oC. What is its half-life (in s) at 65.0oC?

Suppose the half-life is 55.0 s for a first order reaction and the reactant concentration is...

Suppose the half-life is 55.0 s for a first order reaction and the reactant concentration is 0.0761 M 40.1 s after the reaction starts. How many seconds after the start of the reaction does it take for the reactant concentration to decrease to 0.0183 M?

What is the half-life of uranium-238? 2. What is the half-life of lead-206? 3.What is the...

What is the half-life of uranium-238? 2. What is the half-life of lead-206? 3.What is the main difference between alpha decay and beta decay? 4. Is there an application for either type of decay that is beneficial to humans? 5. During radioactive decay, which additional type of radiation is often emitted along with alpha or beta particles? 6. Why does the table not include the type of radiation discussed in question five? 7. Including your answer for question five, list...

Suppose a chemical reaction is first order and has a half-life of 2.5 hr at 100...

Suppose a chemical reaction is first order and has a half-life of 2.5 hr at 100 ºC. Which of the following statements is false regarding this reaction if the temperature is changed? Question 5 options: A) The half-life at 125 ºC is 1.8 hr. B) The half-life at 275 ºC is 3.5 hr. C) The half-life at 75 ºC is 4.7 hr. D) Not enough information has been provided in order to make a conclusion.

Define activation energy, half-life, and zeroth order reaction in your own words.

A certain first order reaction has a half-life of 0.35 hours. How long will it take...

A certain first order reaction has a half-life of 0.35 hours. How long will it take for 12.5 % of the reactant to react? For a certain first order reaction, it was found that after 35 seconds; only 15 % of the reactants had reacted. What is the numerical value of the rate constant? A certain first-order reaction has a half-life of 25 seconds. What percentage of the reactant will remain after 125 seconds? A certain first-order reaction has a...

1) A first-order reaction has a half-life of 15.5 s . How long does it take...

1) A first-order reaction has a half-life of 15.5 s . How long does it take for the concentration of the reactant in the reaction to fall to one-eighth of its initial value? 2) The rate constant for a certain reaction is k = 4.30×10−3 s−1 . If the initial reactant concentration was 0.350 M, what will the concentration be after 8.00 minutes?

The half-life of a reaction, t1/2, is the time required for one-half of a reactant to...

The half-life of a reaction, t1/2, is the time required for one-half of a reactant to be consumed. It is the time during which the amount of reactant or its concentration decreases to one-half of its initial value.Determine the half-life for the reaction in Part B using the integrated rate law, given that the initial concentration is 1.95 mol⋅L−1 and the rate constant is 0.0019 mol⋅L−1⋅s−1

Question