Question

A cylinder of compressed gas rolls off a boat and falls to thebottom of a lake. Eventually it rusts and the gas bubbles to thesurface. A chemist collects a sample of the gas with the idea oftrying to identify the gas. The wet gas collected occupies a volumeof 275 mL at a pressure of 738 torr and temperature of 28.0oC. Thevapor pressure of water at 28.0oC is 0.0372 atm.

1. Calculate the volume (L) that the gas occupies after it is dried(the water vapor removed) and stored at STP

The mass of the dry gas is 872 mg. A fragment of the tank indicatesthat the gas is a monoatomic element.

2. Write out the full name of the gas.