Răspuns:
Explicație:
MCl2 = 2 .35,5 = 71-------> 71g/moli
1mol Cl2----------71 g clor----------6,023.10²³molecule clor
MN2 = 2 . 14 = 28------> 28g/moli
1mol N2-----------28 g-----------6,023.10²³ molecule azot
MH2O =2 +16=18-------> 18g/moli
1mol H2O ---------18g---------6,023.10²³molecule H2O
MNaCl = 23 + 35,5= 58,5--------> 58,5g/moli
1mol NaCl ---------58,5g NaCl----------6,023.10²³molecule NaCl
MNH3 = 14 +3= 17------> 17g/moli
1mol NH3---------17g NH3---------6,023.10²³molecule NH3