Question

Calculati nr de protoni continuti de 1,38 g Na care are Z=11 si A=13

Answer 1

Z=11-->  1atom are 11electroni=11protoni

1molatomi.Na...are masa 23g.....contine N,A= 6,o23x1o²³at(numarul lui Avogadro)

                                      1,38g............N= 0,36x10²³atomi

1 atom............contine 11 protoni

0,36x10²³at..............x=...........................calculeaza !!!!