6. In a hexagonal close-packed crystal, every atom (except those on the surface) has neighbors.
6
8
12
10

the answer is the

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

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 that it is a exoplanet