What happens if you make all different chemicals together including gases

Though this may seem like a sure-fire way to eliminate household germs and diseases, the mixing of chemicals can produce highly toxic fumes or create an extremely corrosive product. The Skokie Fire Department strongly encourages citizens to refrain from the mixing of household chemicals.

Explanation:

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter