What is Osmosis? Put it not so detailed so I can Ctrl+C and Ctrl+V

Osmosis is the passage ot water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)