
Explanation: By convention, oxygen has a molar mass of 32g, while air has a molar mass of 29g. Thus, oxygen is heavier than air in the ratio of 32/29, equivalent to 1.1 times.

Explanation: By convention, oxygen has a molar mass of 32g, while air has a molar mass of 29g. Thus, oxygen is heavier than air in the ratio of 32/29, equivalent to 1.1 times.