Which rule concerning oxidation numbers is NOT true? A. Fluorine always has an oxidation number of –1 in molecules that contain two or more types of atoms.
B. Oxygen has an oxidation number of –2 in molecules that contain two or more types of atoms.
C. If all else fails, assume that the atom’s oxidation number is the same as what it would take on in an ionic compound.
D. Reduction is the process by which an atom gains electrons.
E. Oxidation is the process by which an atom gains electrons.

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.

2b2t

explanation:

2b2t