Need help 14. Consider the following first-order reaction, after 1200 seconds, only 9.072% of the original sample remains.What is the half-life of the reaction?Reaction:AProduct(A) 600.0 sec(B) 264.3 sec(C) 425.2 sec(D) 346.5 sec(E) 625.0 sec15. In the mechanism of a two-step reaction the rate determining step will have the lower activation energy.(A) True(B) False16. Beta (B) decay occurs when an unstable nucleus emits an electron: neutron → proton + emitted electronExample: The nuclear equation for the beta decay of radium-228 is (beta (B) particle: °,e)228Ra →88$Ac + °e22889-1QUESTION: Write the nuclear equation for the beta decay of thorium-234e)17. Positron emission: Proton → neutron + emitted positron (positron:_+1Example: The nuclear equation for the positron emission of phosphorus – 3030p1530Si14+e+1QUESTION: Write the nuclear equation for the positron emission of Na-2218. Alpha (a) decay occurs when an unstable nucleus emits a particle composed of 2 protons and 2 neutrons:Alpha (a) particle: He2Example: The nuclear equation for the alpha decay of uranium-238 is238U →92234TH +90HeQUESTION: Write three nuclear equations to represent the nuclear decay sequence that begins withthe alpha decay of U-235 followed by a beta decay of the daughter nuclide and then another alpha decay.

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What is the half-life of the reaction? Reaction: A Product (A) 600.0 sec (B) 264.3 sec (C) 425.2 sec (D) 346.5 sec (E) 625.0 sec 15. In the mechanism of a two-step reaction the rate determining step will have the lower activation energy. (A) True (B) False 16. Beta (B) decay occurs when an unstable nucleus emits an electron: neutron → proton + emitted electron Example: The nuclear equation for the beta decay of radium-228 is (beta (B) particle: ",e) 228Ra 88 228 Ac + e 89 QUESTION: Write the nuclear equation for the beta decay of thorium-234

What is the half-life of the reaction? Reaction: A Product (A) 600.0 sec (B) 264.3 sec (C) 425.2 sec (D) 346.5 sec (E) 625.0 sec 15. In the mechanism of a two-step reaction the rate determining step will have the lower activation energy. (A) True (B) False 16. Beta (B) decay occurs when an unstable nucleus emits an electron: neutron → proton + emitted electron Example: The nuclear equation for the beta decay of radium-228 is (beta (B) particle: ",e) 228Ra 88 228 Ac + e 89 QUESTION: Write the nuclear equation for the beta decay of thorium-234

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter11: Rate Of Reaction

Section: Chapter Questions

Problem 104QAP: In a first-order reaction, suppose that a quantity X of a reactant is added at regular intervals of...

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