there would be atleast 24 moles of air not counting the irreplacable ones
hope this helped
When invisible waves of radiant energy come into contact with a solid, the particles in the solid vibrate faster. The solid becomes hotter. The solid can in turn, reradiate some of this energy back into the area where it is standing.
Answer : The chemical formula for the molecule is 
Explanation :
Molecular formula : It is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Structural formula : It is a formula in which the lines are used between the bonded atoms and the atoms are also shown in the structural formula.
In the structural formula, the lines are used between the atoms.
As per given information of compound we conclude that, there are 4 carbon atoms, 9 hydrogen atoms and 2 oxygen atoms.
Thus, the chemical formula for the given molecule will be, 
Answer:
The correct option is I and II.
Explanation:
The two goods are substitutes when the price of one good increases the demand for other good increases.
Movies at theaters and movies at homes are substitutes in (I) since the higher price of theater movies causes an increase in demand for home movies.
However, movies at theaters and homes are complements in (II) as an increase in demand for one also causes an increases demand for the other.
Cross price elasticity of complementary goods, however is negative, so (III) is wrong.