Callen H.B - Thermodynamics And An Introduction To Thermostatistics · Problem 1.3-2

THE PROBLEM AND THE POSTULATES

Physics — Statistical Mechanics · mole-fractions-isotopes

Problem

Naturally occurring boron has an atomic mass of 10.811 g. It is a mixture of the isotopes

{}^{10}

B with an atomic mass of 10.0129 g and

{}^{11}

B with an atomic mass of 11.0093 g. What is the mole fraction of

{}^{10}

B in the mixture?