How many molecules are in 1.56 moles of NaCl?

9.39432 x10^23

Explanation:

no of particles = moles * avogradros no

=> 1.56 * 6.022 x10^23

  = 9.39432 x10^23

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.