
Concept explainers
(a)
Interpretation:
The percent of protons to the total mass of one selenium atom has to be given.
(a)

Answer to Problem 55AE
The percent of protons in a selenium atom is 43.37%.
Explanation of Solution
Given,
The mass of one selenium atom is 1.311×10-22 g.
The mass of a proton is 1.6726219×10-24 g.
The total number of protons in Se is 34.
The mass percent can be calculated as,
Mass percent=Mass of electronMass of atom×100
Mass percent=34×1.6726219×10-24 g1.311×10-22 g×100
Mass percent=43.37%
The percent of protons in a selenium atom is 43.37%.
(b)
Interpretation:
The percent of protons to the total mass of one xenon atom has to be given.
(b)

Answer to Problem 55AE
The percent of protons in a xenon atom is 41.13%.
Explanation of Solution
Given,
The mass of one xenon atom is 2.180×10-22 g.
The mass of a proton is 1.6726219×10-24 g.
The total number of protons in Xe is 54.
The mass percent can be calculated as,
Mass percent=Mass of electronMass of atom×100
Mass percent=54×1.6726219×10-24 g2.180×10-22 g×100
Mass percent=41.13%
The percent of protons in a xenon atom is 41.13%.
(c)
Interpretation:
The percent of protons to the total mass of one Chlorine atom has to be given.
(c)

Answer to Problem 55AE
The percent of protons in a Chlorine atom is 48.30%.
Explanation of Solution
Given,
The mass of one Chlorine atom is 5.887×10-23 g.
The mass of a proton is 1.6726219×10-24 g.
The total number of protons in Cl is 17.
The mass percent can be calculated as,
Mass percent=Mass of electronMass of atom×100
Mass percent=17×1.6726219×10-24 g5.887×10-23 g×100
Mass percent=48.30%
The percent of protons in a Chlorine atom is 48.30%.
(d)
Interpretation:
The percent of protons to the total mass of one Barium atom has to be given.
(d)

Answer to Problem 55AE
The percent of protons in a Barium atom is 41.08%.
Explanation of Solution
Given,
The mass of one Barium atom is 2.280×10-22 g.
The mass of a proton is 1.6726219×10-24 g.
The total number of protons in Ba is 56.
The mass percent can be calculated as,
Mass percent=Mass of electronMass of atom×100
Mass percent=56×1.6726219×10-24 g2.280×10-22 g×100
Mass percent=41.08%
The percent of protons in a Barium atom is 41.08%.
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Chapter 5 Solutions
EBK FOUNDATIONS OF COLLEGE CHEMISTRY
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