ajutorrrrrr.....urgent.....

Ajutorrrrrrurgent class=

Răspuns :

4Na + O2=2Na2O

Na2O+H2O=2NaOH

1mol H2O....2moli NaOH
8moli H2O,.....x

x=16moli NaOH

M NaOH=A Na + A O + A H = 40g/mol=> m NaOH=40*16=640g