Question

Care este masa unui atom de sulf ?Cati atomi si cati moli sunt cuprinsi in 16g de sulf

Answer 1

1 mol  are masa 32g
1mol contine 6,023x10²³ atomi; deci
6,023x10²³atomi        au masa  32g
1 atom........................m= 32/ 6,023x10²³  =5,3X10⁻²³g   

Se folosesc formulelel invatate : niu= m/M   si niu= N /N,Avogadro
niu= 16g/32g/mol= 0,5mol
o,5mol= N / 6,023x10²³--->N=3,011X10²³ ATOMI