How does the weight of nitrous oxide compare to that of air?

Nitrous oxide (N₂O) has a molecular weight of approximately 44 grams per mole, while the average molecular weight of air is about 29 grams per mole. Because nitrous oxide has a higher molecular weight than air, it is denser and therefore heavier than air. This means that when nitrous oxide is released, it tends to accumulate closer to the ground rather than dispersing into the atmosphere like lighter gases would. The higher density is significant in various applications, including its use in dental and medical settings, as it can affect the distribution and potential accumulation of the gas in a confined environment.