In this case, for the described chemical reaction, we can write:
Thus, by considering the 1:2 mole ratio of methane to water, and the molar mass of the latter (18.02 g/mol), the following is useful to calculate the mass of water that is produced:
Answer:Even if your door is closed, you would still smell the odors because of the space under the door and the space that is needed to close the door.