Acell consists of a gold wire and a saturated calomel electrode (s. c.e.) in a 0.160 m auno3 solution at 25 °c. the gold wire is connected to the positive end of a potentiometer, and the s. c.e. is connected to the negative end of the potentiometer. what is the half-reaction for the au electrode?

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.

the answer is definitely c.