Is the gas from mixing vinegar and baking soda toxic?

No, the gas from mixing vinegar and baking soda is not toxic. The reaction between vinegar (acetic acid) and baking soda (sodium bicarbonate) produces carbon dioxide gas, which is harmless and is often used in carbonated beverages and as a leavening agent in baking. However, it's important to note that inhaling excessive amounts of any gas can be potentially harmful, so it's generally not recommended to inhale the gas directly from the reaction.