Răspuns:
N,A=6,023X10²³ molec/mol numarul lui Avogadro
6,023x10²³molec..............1mol
12,044x10 ²⁴..........................
x= niu=20molO2
1mol...............22,4l
20mol............x
x=448l
SE POT UTILIZA RELATIILE niu=N/N,A niu= V/Vm, Vm=22,4l/mol
M,apa= 2gH +16gO=> 18g/mol
18g apa...........2gH
2700g.............x
x=m=300g H
Explicație: