Question

Cati atomi de oxigen se gasesc in 64 g oxigen atomic

Answer 1

$Oxigenul \ atomic \ contine \ 1 \ atom \ de \ O.$

$M_{O}=16g/mol$

$n=\frac{m}{M_O}=4$

$1mol O..........6,023*10^{23} \ atomi$

$4moli O..........x$

$x=4*6,023*10^{23}$

$x=2,4092*10^{24} \ atomi \ de \ O$