Oh this is extremely hard...i might just die lol jk its the last one measuring cylinder :)
Answer: 
Explanation:
Firstly, we have to find the Molecular mass of potassium oxide (
):
atomic mass: 39 u
atomic mass: 16 u
molecular mass: 
This means that in 1 mole of there are 
and we need to find how many moles there are in 
:
1 mole of ----- of
----- of
This is the quantity of moles in 73.9 g of potassium oxide
Now we can calculate the number of atoms in 73.9 g of potassium oxide by the following relation:
Where:
is the number of atoms in 73.9g of potassium oxide
is the Avogadro's number, which is determined by the number of particles (or atoms) in a mole.
Then:
This is the quantity of atoms in 73.9g of potassium oxide
As you go deeper into, the pressure rises. Density is defined as mass/volume. Because of pressure, the layers beneath us become densely packed.
Answer:
Stacking storage sacks/ bags by interlocking, and placing heavier object on lower shelves.
Explanation:
Not sure what you meant exactly, but this is my best guess.
