A lecture cylinder contains
Cl₂(g) at 298 K and 5.0 atm. Naturally occurring chlorine consists of two stable isotopes, ³⁵Cl (75.77 % abundance) and ³⁷Cl (24.23 % abundance).
Answer the following questions about the material in the cylinder.
(a) Using the definition of a pure substance, argue whether the contents of the cylinder should be classified as a pure substance or a mixture.
(b) Calculate the weighted average atomic mass of chlorine to four significant figures.
(c) Explain how the calculation in part (b) supports or contradicts your classification from part (a).