Chapter 0, Problem 14PE

Practice Exercise 0.14

Neon, the gas used in neon lamps, is composed of 90.483% of ${}^{\text{20}}\text{Ne}$ atoms. 0.271% of ${}^{\text{21}}\text{Ne}$ atoms, and 9.253% of ${}^{\text{22}}\text{Ne}$ atoms. The ${}^{\text{20}}\text{Ne}$ atoms have a mass of 19.992 u, ${}^{\text{21}}\text{Ne}$ atoms have a mass of 20.994, and those of ${}^{\text{22}}\text{Ne}$ have a mass of 21.991 u. Calculate the average atomic mass of neon.