A piece of silver metal weighting 194.3g placed in graduated cylinder containing 242.0ml of water the volume of water now reads 260.5ml, calculate the density of the metal

Explanation:

Volume of metal = 260.5ml - 242.0ml = 18.5ml

Density = Mass / Volume = 194.3 / 18.5 = 10.5g/cm³.

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.