Răspuns:
Explicație:
8g xg
NaOH + HCl = NaCl + H2O
40g 58,5g
x= 8 . 58,5 :40= 11,7 g NaCl
n= 11,7g : 58,5g/moli=0,2 moli NaCl
MNaOH=23 +16+1=40------->40g/moli
MNaCl=23 +35,5=58,5--------> 58,5g/moli