What is the most important role that water plays for living organisms

a. all organisms need water to stay clean
b. all organisms need water to transport water into their cells
c. all organisms need water as an energy source
d. all organisms live in water

All organisms need water to transport chemicals into their cells.

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.