Question

Cati atomi de fier sunt cuprinsi intr-un cui cu masa de 5g?

Answer 1

$\mathtt{A_{Fe}=56g/mol}$

$\mathtt{56g..........6,023\cdot10^{23} \ atomi}$

$\mathtt{5g..........x \ atomi}$

$\mathtt{x=\frac{5\cdot6,023\cdot10^{23}}{56}=0,5377\cdot10^{23}=5,377\cdot10^{22} \ atomi}$