The mass of NaCl : 50.5 g
Further explanation
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
There are 5.20 x 10²³ units of NaCl, so mol NaCl :
[tex]\tt n=\dfrac{N}{No}\\\\n=\dfrac{5.2\times 10^{23}}{6.02\times 10^{23}}\\\\n=0.864~moles[/tex]
Mass of NaCl(MW=71 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=0.864\times 58.44\\\\mass=50.49\approx 50.5~g[/tex]
