Radioactive elements decay via first-order kinetics. Consider a certain type of nucleus that has a rate constant of 2.4 × 10-2 h-1. A sample contains 6.5 × 108 radioactive nuclides. Calculate the time required for 59% of the nuclides to decompose.?12=0.693?t12=0.693kln[?]?=−??+ln[?]?ln⁡[A]t=−kt+ln⁡[A]oGroup of answer choicesA. 2.2 × 10-1 hB. 1.6× 101 hC. 2.2 × 101 hD. 1.0 × 101 hE. 3.7 × 101 h 2.Which metal is the best reducing agent?Group of answer choicesA. ??+(??)+1?Ag+(aq)+1e- ⟶??(?);?∘=0.80?⟶Ag(s);E∘=0.80VB. ??3+(??)+3?Au3+(aq)+3e- ⟶??(?);?∘=1.50?⟶Au(s);E∘=1.50VC. ??2(?)+2?Cl2(g)+2e- ⟶2??⟶2Cl-; ?∘=1.36?E∘=1.36VD. ?2(?)+2?F2(g)+2e- ⟶2?⟶2F-1; ?∘=2.87?E∘=2.87VE. ??4+(??)+4?Sn4+(aq)+4e- ⟶??(?);?∘=0.15? 3.In an acidic solution, balance the following redox reaction with lowest possible coefficients. What is the coefficient in front of Fe2+???2+(??)+???−4(??)⟶??3+(??)+??2+(??)Fe2+(aq)+MnO4−(aq)⟶Fe3+(aq)+Mn2+(aq) Group of answer choicesA. 3B. 4C. 8D. 1E. 5

As radioactivity follows first order kinetics , so we can find time required in the first problem.

Answered: Radioactive elements decay via…

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter13: Chemical Kinetics

Section: Chapter Questions

Problem 13.50QE

See similar textbooks

Related questions

Question

Radioactive elements decay via first-order kinetics. Consider a certain type of nucleus that has a rate constant of 2.4 × 10^-2 h^-1. A sample contains 6.5 × 10⁸ radioactive nuclides. Calculate the time required for 59% of the nuclides to decompose.

?12=0.693?t12=0.693k

ln[?]?=−??+ln[?]?ln⁡[A]t=−kt+ln⁡[A]o

Group of answer choices

A. 2.2 × 10^-1 h

B. 1.6× 10¹ h

C. 2.2 × 10¹ h

D. 1.0 × 10¹ h

E. 3.7 × 10¹ h

Which metal is the best reducing agent?

Group of answer choices

A. ??+(??)+1?Ag+(aq)+1e^- ⟶??(?);?∘=0.80?⟶Ag(s);E∘=0.80V

B. ??3+(??)+3?Au3+(aq)+3e^- ⟶??(?);?∘=1.50?⟶Au(s);E∘=1.50V

C. ??2(?)+2?Cl2(g)+2e^- ⟶2??⟶2Cl^-; ?∘=1.36?E∘=1.36V

D. ?2(?)+2?F2(g)+2e^- ⟶2?⟶2F^-1; ?∘=2.87?E∘=2.87V

E. ??4+(??)+4?Sn4+(aq)+4e^- ⟶??(?);?∘=0.15?

In an acidic solution, balance the following redox reaction with lowest possible coefficients. What is the coefficient in front of Fe²⁺?

??2+(??)+???−4(??)⟶??3+(??)+??2+(??)Fe2+(aq)+MnO4−(aq)⟶Fe3+(aq)+Mn2+(aq)

Group of answer choices

A. 3

B. 4

C. 8

D. 1

E. 5

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions