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sergiy2304 [10]
1 year ago
10

What is a thermal insulation material that is no longer used because of formaldehyde gas emission?

Chemistry
1 answer:
Ludmilka [50]1 year ago
7 0

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.

brainly.com/question/14645797?referrer=searchResults

#SPJ4

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How much atomic mass does Osmium have
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190.23g

Explanation:

Osmium is element number 76 on the periodic table, with the atomic symbol "Os." The atomic mass of any element is listed underneath the atomic symbol. Osmium has an atomic mass of 190.23 grams.

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Which intermolecular force is characteristic of compounds with low molar mass, which are liquids at room temperature and have re
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3 years ago
can someone help me with these? I just started chemistry this semester, and since it's involving math I don't see myself doing g
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Any non zero digits are significant. (120 has 2 sig figs)

Zeroes between significant digits are significant. (103 has 3 sig figs)

Zeroes only count if there is a decimal point and if they are following a significant digit. (.600 has 3 sig figs; .067 has 2 sig figs)

1) <u>1278.50</u> = 6 sig figs

2) <u>12</u>0000 = 2 sig figs

3) <u>90027.00</u> = 7 sig figs

4) 0.00<u>53567</u> = 5 sig figs

5) <u>67</u>0 = 2 sig figs

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That's all I'm gonna do so yeah.

Now for the rounding, it's basically rounding but it must have the x amount of sig figs after rounding. It's pretty hard to explain.

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21) 0.0008769, the third sig fig here would be 6. You round 6 up to 7 because the number next to it is 9.

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So I hope you get it, I'm gonna let you do the rest.

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