EXPLOR. CHEM ANALYSIS (LL) - W/ ACHIEVE
EXPLOR. CHEM ANALYSIS (LL) - W/ ACHIEVE
5th Edition
ISBN: 9781319468859
Author: Harris
Publisher: MAC HIGHER
Question
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Chapter 1, Problem 1.3P

(a)

Interpretation Introduction

Interpretation:

1013 joules has to be expressed with abbreviations for units and prefixes.

Concept Introduction:

SI units refers to ‘International System of Units’ which have been used in the modern scientific calculations and metric system.

It constitutes units of measurement of seven basic parameters – length, mass, time, electricity, temperature, amount of substance and luminous intensity.

The units derived from the seven fundamental units that are stated above are termed as SI derived units.

The SI unit of measurement and derived SI units must be written as symbol in lowercase but unit named after a scientist must be written with first alphabet as uppercase.

Prefixes are the terms used to express smaller and larger quantities – in microscopic and macroscopic level.

(a)

Expert Solution
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Explanation of Solution

The quantity 1013 joules can be expressed as 100 fJ. fJ is femtoJoule and the prefix femto is equivalent to 1015100 can be written as 102 and so 100 fJ is equivalent to 1013 joules as 102×1015J = 1013J.  1013 joules can also be written as 0.1 pJ.  pJ is picoJoule and the prefix pico is equivalent to 1012. Thus 0.1 pJ is equivalent to 1013 joules as 0.1×1012J = 101×1012J=1013J.

(b)

Interpretation Introduction

Interpretation:

4.31728×108 coulombs has to be expressed with abbreviations for units and prefixes.

Concept Introduction:

Refer to part (a)

(b)

Expert Solution
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Explanation of Solution

The quantity 4.31728×108 coulombs can be expressed as 4.31728×108 C.  C is coulomb.

(c)

Interpretation Introduction

Interpretation:

2.9979×1014 hertz has to be expressed with abbreviations for units and prefixes.

Concept Introduction:

Refer to part (a)

(c)

Expert Solution
Check Mark

Explanation of Solution

The quantity 2.9979×1014 hertz can be expressed as 299.79 THz.  THz is tera Hertz and the prefix tera is equivalent to 10122.9979×1014 hertz can also be expressed as 0.29979 THz. PHz is peta Hertz and the prefix peta is equivalent to 1015.

(d)

Interpretation Introduction

Interpretation:

1010meters has to be expressed with abbreviations for units and prefixes.

Concept Introduction:

Refer to part (a)

(d)

Expert Solution
Check Mark

Explanation of Solution

The quantity 1010meters can be expressed as 0.1 nm. nm is nanometer and the prefix nano is equivalent to 109.  1010meters can also be expressed as 100 pm. pm is picometer and the prefix pico is equivalent to 1012.  Therefore

  1010meter = 0.1 ×109m = 0.1 nm                   = 102×1010102m                   = 100×1012m = 100 pm

(e)

Interpretation Introduction

Interpretation:

2.1×1013watts has to be expressed with abbreviations for units and prefixes.

Concept Introduction:

Refer to part (a)

(e)

Expert Solution
Check Mark

Explanation of Solution

The quantity 2.1×1013watts can be expressed as 21 TW. TW is TeraWatts and the prefix tera is equivalent to 1012.  Therefore,

  2.1×1013watts = 21 ×101×1013watts                        = 21×1012 watts                        = 21 TW

(f)

Interpretation Introduction

Interpretation:

48.3×1020moles has to be expressed with abbreviations for units and prefixes.

Concept Introduction:

Refer to part (a)

(f)

Expert Solution
Check Mark

Explanation of Solution

The quantity 48.3×1020moles can be expressed as 0.483 amol or 483 zmol. amol is attomole and zmol is zeptomole. the prefix atto is equivalent to 1018 and the prefix zepto is equivalent to 1021. Therefore

48.3×1020moles =483 ×1021 moles                         483 zmol

Also,

    48.3×1020moles =0.483 ×1020×102 moles                         = 0.483 ×1018 moles = 0.483 amol

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