Urea Formaldehyde Foam Insulation is the thermal insulation material that is no longer used because of formaldehyde gas emission
Urea Formaldehyde Foam Insulation is mixture of urea formaldehyde resin, foaming acid agent, and a propellant used in the 1970s for insulating purposes.
It was specifically designed to insulate the areas of the building that were hard to access. Unlike regular process, it was sprayed into the walls by using holes.
It is no longer used because it caused a raise in the formaldehyde gas in the residence. This gas caused irritations to the people living in the building. Residents started to report health issues like respiratory problems, and eyes, nose, throat irritation.
If you need to learn about the formaldehyde gas, click here.
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Answer:
its where a whale has died and the carcass of the whale sinks to the depth of the oceanic floor.
:) hope that helps
Explanation:
Answer:
foetus, baby, child, adolescent, adult and old person
Explanation:
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I would believe it to be 55g. A -> B YIELDS AB. So, 10g + 45g = 55g.
With a physical change you can actually see it change like ice turning into water, then with a chemical change you can't see it change, although within the molecules themselves they change which makes that possible.
Hope this helps!
