Răspuns:
M= (4X12gC +10X1gH)/mol=58g/mol
58gC4H10..................4moli at.C
540g...........................x=540x4/58moli=37,24mol at.C
1mol at. ........ 6,023x10²³at
37,24mol....................x
x=224x10²³ at.= 2,24x10²⁵ at.
Explicație:
