Question

3. Cati atomi se gasesc in a) 50 g P b) 20 Cu
va rog!!! dau coroana​

Answer 1

Răspuns:

a)

MP=31g/mol

n=m/M=50/31=1,6mol P

1mol P..................6,022x10²³atomi

1,6moliP.....................x atomi

x=1,6x6,022x10²³atomi/1=calcuelaza

b)

MCu=64g/mol

n=m/M=20/64=0,3moli Cu

1mol Cu..................6,022x10²³atomi

0,3moliCu....................y atomi

y=0,3x6,022x10²³atomi/1=calculeaza

Explicație: