What effect does molar mass have on the Procedure behaviour of a gas? In fact, molar mass helps to 1. Using a periodic table, record the molar mass determine whether a compound or element is of each of the gases listed in the table. gaseous or not. You will examine the connection 2. Plot a graph of boiling points of gases ( y-axis) between boiling point and molar mass here. versus their molar masses ( x-axis). Table 11.3 The Boiling Points of Various Gases Analysis 1. From the graph obtained, what relationship exists between the molar mass of a gas and its boiling point? 2. Using the graph, what would be the boiling points of gases such as hydrogen (H2), fluorine (F2) and radon (Rn) ? 3. Predict whether a substance such as bromine (Br2) would be a gas or liquid at room Materials temperature. Use a reference book to check graph paper; periodic table your