9. A hypothetical element (Engineerium, En) has 2 stable isotopes: 123 En and 125 En. If the averageatomic weight of En is 124.27 amu, what is the isotopic abundance of each of the stable isotopes?

The average atomic mass can be calculated asAAM=100m1×%m1+m2×%m2Let the %m1 be x. Then %m2 is…

Answered: 9. A hypothetical element (Engineerium,…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Example 5: Pecar and Dolecek (2005) experimentally determined the densities and the partial molar volumes of a binary mixture of ethanol (1) and water (2) as a function of temperature and pressure. In a mixture with an ethanol mole fraction of 0.35 at 298K and 1bar, the mixture density and the partial molar volume of ethanol are determined as 891.9 kg /m3 and 57.31 cm3/mol, respectively. Calculate the partial molar volume of water.
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4. Argon has 3 stable isotopes: 36 Ar, 38 Ar, and 40 Ar with natural abundances of 0.3365%, 0.0632%, and 99.6003% respectively. The atomic weights of these 3 isotopes are 35.9675 amu, 37.9627 amu, and 39.9624 amu respectively. Calculate the average atomic weight of Ar.
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9. A hypothetical element (Engineerium, En) has 2 stable isotopes: 123 En and 125 En. If the average atomic weight of En is 124.27 amu, what is the isotopic abundance of each of the stable isotopes?