Question

REPEDEEEEEEEE VA ROOOOOG​

Answer 1

Răspuns:

n=nr.moli ;  n=m:M ; m=masa subst.  ; M=masa molara

Explicație:

MMgO=24 +16=40---->40g/moli

n= 160g : 40g/moli=4 moli MgO

  mg      xg       160g

   2Mg + O2=2MgO

2.24g     32g   2.40g

m=48. 160 : 80=96g Mg

n= 96g  :24g/moli=4moli Mg

x=32 . 160 :80=64 g oxigen

n=64g : 32g/moli=2 moli O2