sarinaneedshelp01

12.03.2021 • 

Chemistry

Which of the following statements regarding insulation is true? A. Unset starred question Blanket insulation comes in fiberglass rolls.
B. Loose fill insulation is no longer used due to concerns about formaldehyde.
C. Vermiculite and perlite are examples of blanket insulation.
D. Wallboard insulation often comes in 15.5-inch widths to fit between framing members.

Ответ:

AdrienneFaye

12.03.2021

Chemistry

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Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/wzUiVyK

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Ответ:

teacherpreacher

15.02.2020

Chemistry

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1) Silicon dioxide formula: SiO2  2 is a subscript for the O atom

2) From the formula you have 1 molecula of SiO2 contains 1 atom of SiO2

3) Then, 0.100 mol of SiO2 contains 0.1 mol of Si

4) Multiply by Avogadro's number: 0.100mol *  6.022*10^23 atoms/mol= 6.02*10^22 atoms

6.02*10^22 atoms

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