The gas could be which of the following? Select all that apply. Hint: These gases are more dense than air. Nitrogen Neon Argon Carbon Dioxide Helium Hydrogen Propane Carbon Monoxide
![The gas could be which of the following Select all that apply Hint These gases are more dense than air Nitrogen Neon Argon Carbon Dioxide Helium Hydrogen Propan class=](https://us-static.z-dn.net/files/d7d/d69709423b357d641955461b30196dde.jpg)