Answer:
1963.93 Moles
Explanation:
-We know the standard conversion ratio for the volume of a mole is
Given volume of rooms as 
Convert the volume into liters:
#From our conversion ratio above, we get the volume of air molecules in moles as:

Hence, the volume of air molecules is 1963.93 Moles
“The term significant figures refers to the number of important single digits (0 through 9 inclusive) in the coefficient of an expression in scientific notation . The number of significant figures in an expression indicates the confidence or precision with which an engineer or scientist states a quantity.”
Answer:
<em><u>number</u></em><em><u> </u></em><em><u>d</u></em>
Explanation:
<em><u>because</u></em><em><u> </u></em><em><u>plant</u></em><em><u> </u></em><em><u>need</u></em><em><u> </u></em><em><u>carbondioxide</u></em>
Length of the sheet is given as

width of the sheet is given as

now let say its thickness is "t"
so the volume of the sheet is given as



mass of the sheet is given as

now we have


by solving above we have

so the thickness of sheet will be above