The solubility of zinc bromide at 20°c and 80°c are 446 and 645 respectuvely. what is the weight og zinc bromide crystal formed when 100 gram of solution cooled from 80°c to 20°c.

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.

yes

ya te ayud espera