Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 x 102º molecules of reactant at time t = 0, how many molecules remain unreacted after 100.0 minutes? 1.00 x 10 molecules 2.00 x 10 molecules 3.20 x 1016 molecules 5.00 x 1020 molecules A. В. С. D. Е. none of these choices is correct Carbon-14 is a radioactive isotope which decays with a half-life of 5730 years. What is the first-order rate constant for its decay, in units of years ? 5.25 x 10$ years" 1.21 x 104 years 1.75 x 104 years 3.49 x 104 years 3.97 x 10' years A. В. С. D. Е. The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year". What fraction of the tritium initially in a sample is still present 30 years later? А. 0.19 В. 0.60 С. 0.15 D. 2.8 x 10-38

A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 x 102º molecules of reactant at time t = 0, how many molecules remain unreacted after 100.0 minutes? 1.00 x 10 molecules 2.00 x 10 molecules 3.20 x 1016 molecules 5.00 x 1020 molecules A. В. С. D. Е. none of these choices is correct Carbon-14 is a radioactive isotope which decays with a half-life of 5730 years. What is the first-order rate constant for its decay, in units of years ? 5.25 x 10$ years" 1.21 x 104 years 1.75 x 104 years 3.49 x 104 years 3.97 x 10' years A. В. С. D. Е. The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year". What fraction of the tritium initially in a sample is still present 30 years later? А. 0.19 В. 0.60 С. 0.15 D. 2.8 x 10-38

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
See similar textbooks
icon
Related questions
Question
kindly answer the following question below, choose the best answer. thank u so much
32. A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 × 102º molecules of reactant at time t = 0, how many molecules remain unreacted after 100.0 minutes? 1.00 x 10* molecules 2.00 × 101º molecules 3.20 × 1016 molecules 5.00 x 1020 molecules A. В. С. D. Е. none of these choices is correct 33. Carbon-14 is a radioactive isotope which decays with a half-life of 5730 years. What is the first-order rate constant for its decay, in units of yearsl? 5.25 x 10$ years' В. 1.21 x 104 years А. С. 1.75 x 104 years D. 3.49 x 10“ years" 3.97 x 10' years E. 34. The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year". What fraction of the tritium initially in a sample is still present 30 years later? A. 0.19 В. 0.60 C. 0.15 2.8 x 1038 none of these choices is correct D. Е.
Transcribed Image Text:32. A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 × 102º molecules of reactant at time t = 0, how many molecules remain unreacted after 100.0 minutes? 1.00 x 10* molecules 2.00 × 101º molecules 3.20 × 1016 molecules 5.00 x 1020 molecules A. В. С. D. Е. none of these choices is correct 33. Carbon-14 is a radioactive isotope which decays with a half-life of 5730 years. What is the first-order rate constant for its decay, in units of yearsl? 5.25 x 10$ years' В. 1.21 x 104 years А. С. 1.75 x 104 years D. 3.49 x 10“ years" 3.97 x 10' years E. 34. The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year". What fraction of the tritium initially in a sample is still present 30 years later? A. 0.19 В. 0.60 C. 0.15 2.8 x 1038 none of these choices is correct D. Е.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS