Răspuns:
Explicație:
NaOH
10 moli Na-----> m= n .M
m= 10moli . 23g/moli = 230g Na
MNaOH= 23 + 16 +1=40-----> 40g/moli
40g NaOH------------------23gNa
yg NaOH--------------------230g Na
y= 40 . 230 : 23 = 400g NaOH
n= m : M
n= 400g : 40g/moli = 10moli NaOH