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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Hello!
The volume of the gas when its pressure is increased to 880 mm Hg is
88,64 mLThis question can be easily answered using the
Boyle's Law, which states that as pressure increases, the volume is lower. It can be expressed in a mathematical way as follows:

So, from this equation we can clear V₂ to find the volume at 880 mm Hg:

Have a nice day!
The answer is machines, and object. I hope this helps.
Explanation:
According to the law of conservation of mass, it makes a generalized observation that there will occur no change in the mass of a substance even if it undergoes a chemical reaction.
Whereas this law of conservation does not explain any phenomenon of why this conservation of mass occurs.
Therefore, the given statements are classified as follows.
A) It was developed from past observations - Ture
B) It is subject to experimentation and revision - True
C) It explains why mass is conserved - False
D) It predicts future observations - True