Răspuns:
din ecuatia reactiei chimice, deduc moli si masaHCl
2mol 6mol
2Al + 6HCl--------> 2AlCl3 + 3H2
4mol..........x= 12molHCl
m,HCl= 12molx36,5g/mol=.....................calculeaza !!!!
mAl=4molx27g/mol=.....................calculeaza !!!
1mol Al................N,A atomi (NR.lui Avogadro)
4mol......................N= 4x6,023x10²³at=......................calculeaza
1atom.........13e
4xN,A---------Ne= 4x6,023X10²³X13=............CALCULEAZA !!!!!!
Explicație: