/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 11 K+聽is an electrolyte required b... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 6: Q. 11 (page 214)

K+is an electrolyte required by the human body and found in many foods as well as salt substitutes. One of the isotopes of potassium is potassium-40, which has a natural abundance of 0.012%and a half-life of 1.30脳109yr. The isotope potassium-40decays to calcium鈥�40or to argon-40. A typical activity for potassium-40is 7.0渭颁颈per gram.(5.2,5.3,5.4)


Potassium chloride is used as a salt substitute.

a. Write a balanced nuclear equation for each type of decay and identify the particle emitted.

b. A shaker of salt substitute contains 1.6ozof K. What is the activity, in millicuries and becquerels, of the potassium in the shaker?

Short Answer

Expert verified

a. A balanced nuclear equation isK1940鈫�Ar1840+e+10.

b. The activity is1.67脳1012Bq.

Step by step solution

01

Part (a) step 1: Given Information 

We need to write a balanced nuclear equation for each type of decay and identify the particle emitted.

02

Part (a) step 2: Simplify

Beta-decay:

K1940鈫�C2040a+e-10

Positron emission:

K1940鈫�Ar1840+e+10

03

Part (b) step 1: Given Information 

We need to find the activity, in millicuries and becquerels, of the potassium in the shaker.

04

Part (b) step 2: Simplify

Consider:

Activity=7mCigmass=1.6ozK

1oz=28.34g1.6ozK=1.6脳28.34g=45.344g

1Ci=3.7脳1010A=45.344脳3.7脳1010=1.67脳1012Bq

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Using each of the following electron arrangements, give the formulas for the cation and anion that form, the formula for the compound they form, and its name.

Name each of the following molecular compounds:

a. N2O3

b. Si2Br6

c. P4S3

d. PCl5

e.SeF6

Write the name for each of the following ionic coenpounds:

a.MgCl2

b. localid="1652627035260" K3P

c. localid="1652627056006" role="math" Li2S

d. localid="1652627059290" CsF

e.MgO

f. localid="1652627098249" SrBr2

Consider an ion with the symbol X2+formed from a representative

element.

a. What is the group number of the element?

b. What is the Lewis symbol of the element?

c. If Xis in Period 3, what is the element?

d. What is the formula of the compound formed from Xand

the nitride ion?

Name each of the following molecular compounds: (6.5)

(a) CF4(b) SF6(c) BrCl(d) N2O4(e) SO2(f)CS2
See all solutions

Recommended explanations on Chemistry Textbooks

Ionic and Molecular Compounds

Read Explanation

Chemical Reactions

Read Explanation

The Earths Atmosphere

Read Explanation

Inorganic Chemistry

Read Explanation

Making Measurements

Read Explanation

Nuclear Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.