Question

FOARTE URGENT!!! PUNCTE SI COROANA!​

Answer 1

Răspuns:

Explicație:

8moli  NaOH

g,moli Na

g,moliNa2O

g,moli H2O

xmoli   ymoli        8moli

2Na  + 2 H2O  =2 NaOH + H2

2moli   2moli        2moli

x= 8 .2 :2 = 8moli Na

n=m : M

m= n . M

m= 8moli . 23g/moli = 184 g Na

y=8 .2 : 2= 8moli H2O

m= 8moli .18g/moli = 144g H2O

zmoli        w moli    8moli

Na2O  +  H2O    = 2 NaOH

1mol        1mol           2moli    

z= 8 .1 : 2= 4moli Na2O      

MNa2O= 2.23 + 16=62-------> 62g/moli

m= 4moli .62g/moli = 248g Na2O    

w=8 : 2= 4moli H2O

m= 4moli .18g/moli =    72gH2O