Question

Cati atomi se gasesc in 10g de H,He,Li,Na,K,P,Hg,Cl,I,Nr,N?
Va rog!!

Answer 1

-Se rezolva in doua etape:

-se calculeaza nr.moli:  niu=m/M

-se calculeaza nr.at: N= niuxN,A

H     niu=10g/1g/mol=10mol       N= 10molx6,023x10²³at= 60,23x10²³at

He       = 10g/4g/mol= 2,5mol    N= 2,5x6,023x10²³at=.............................

Li         = 10g/7g/mol=1,43mol      N= 1,43x6,023x10²³at=....................

Na       = 10g/23g/mol=0,43mol.. .N= 0,43X6,023X10²³at=......................

K          =10g/39g/mol=0,26mol    N= 0,26X6,023X10²³at=.......................

continua !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!