EBK FOUNDATIONS OF COLLEGE CHEMISTRY
EBK FOUNDATIONS OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781118930144
Author: Willard
Publisher: JOHN WILEY+SONS INC.
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Chapter 5, Problem 54AE

(a)

Interpretation Introduction

Interpretation:

The percent of electrons to the total mass of one aluminium atom has to be given.

(a)

Expert Solution
Check Mark

Answer to Problem 54AE

The percent of electrons in an aluminium atom is 0.2642%.

Explanation of Solution

Given,

The mass of one aluminum atom is 4.480×10-23g.

The mass of an electron is 9.1093897×10-27g.

The total number of electrons in Al is 13.

The mass percent can be calculated as,

  Masspercent=MassofelectronMassofatom×100

  Masspercent=13×9.1093877×10-27g4.480×10-23g×100

  Masspercent=0.2642%

The percent of electrons in an aluminium atom is 0.2642%.

(b)

Interpretation Introduction

Interpretation:

The percent of electrons to the total mass of one phosphorus atom has to be given.

(b)

Expert Solution
Check Mark

Answer to Problem 54AE

The percent of electrons in phosphorus atom is 0.2656%.

Explanation of Solution

Given,

The mass of one phosphorus atom is 5.143×10-23g.

The mass of an electron is 9.1093897×10-27g.

The total number of electrons in P is 15.

The mass percent can be calculated as,

  Masspercent=MassofelectronMassofatom×100

  Masspercent=15×9.1093877×10-27g5.143×10-23g×100

  Masspercent=0.2656%

The percent of electrons in phosphorus atom is 0.2656%.

(c)

Interpretation Introduction

Interpretation:

The percent of electrons to the total mass of one Krypton atom has to be given.

(c)

Expert Solution
Check Mark

Answer to Problem 54AE

The percent of electrons in Krypton atom is 0.2355%.

Explanation of Solution

Given,

The mass of one Krypton atom is 1.392×10-22g.

The mass of an electron is 9.1093897×10-27g.

The total number of electrons in Kr is 36.

The mass percent can be calculated as,

  Masspercent=MassofelectronMassofatom×100

  Masspercent=36×9.1093877×10-27g1.392×10-22g×100

  Masspercent=0.2355%

The percent of electrons in Krypton atom is 0.2355%.

(d)

Interpretation Introduction

Interpretation:

The percent of electrons to the total mass of one platinum atom has to be given.

(d)

Expert Solution
Check Mark

Answer to Problem 54AE

The percent of electrons in platinum atom is 0.2193%.

Explanation of Solution

Given,

The mass of one platinum atom is 3.240×10-22g.

The mass of an electron is 9.1093897×10-27g.

The total number of electrons in Pt is 78.

The mass percent can be calculated as,

  Masspercent=MassofelectronMassofatom×100

  Masspercent=78×9.1093877×10-27g3.240×10-22g×100

  Masspercent=0.2193%

The percent of electrons in platinum atom is 0.2193%.

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